Consulta: subjectFacets:"Ethylene"
Registros recuperados: 50
Data/hora: 11/06/2024 00:33:18

In vitro culture response of barley (Hordeum vulgare) ethylene synthesis mutant MC 169
Provedor de dados: Electronic Journal of Biotechnology
Autores: Biagioli,Carolina; Rios,Raúl; Basso,Alicia; Franzone,Pascual; Prina,Alberto.
Although it is generally accepted that plant in vitro culture response is influenced by the donor genotype, the genetic and molecular bases of this phenomenon are barely known. As a consequence, the optimization of tissue culture protocols is mainly empirically done. Researchers of the IGEAF studied the genetic basis of the in vitro regeneration of various plant species, including the tissue culture response of artificially induced barley mutants. One barley mutant, MC 169, carries a nuclear gene, recently described controlling the root growth in hydroponic cultivation. Under this condition, the roots of MC 169 mutant plants were longer than those of the original wild type line MC 182, a fact that was associated with a reduced ethylene biosynthesis. On the...
Tipo: Journal article
Palavras-chave: Callus induction; Ethylene; Habituated calli; Hydroponic culture; Regeneration.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300019

The effects of ethylene on the HCl-extractability of trace elements during soybean seed germination
Provedor de dados: Electronic Journal of Biotechnology
Autores: Liu,Chunming; Zhao,Yixin; Liu,Jianfeng; Gen,Wanting; Cheng,Yunqing.
Background Ethylene is capable of promoting seed germination in some plant species. Mobilization of metals such as Fe, Cu, Mn, and Zn in mature seeds takes place when seeds are germinating. However, whether ethylene is involved in the regulation of soybean seed germination and metal element mobilization during early seed germination stage remains unknown. In the present study, seeds were treated with ethylene synthesis inhibitor aminoethoxyvinylglycine (AVG) and ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), and double distilled H2O (ddH(2)0) treatment was used as control. Ethylene emission, ACC synthase (ACS) expression, ACS enzyme activity and Ca, Zn, Mn, Cu and Fe content in hypocotyls were qualified to analyze the relationship between...
Tipo: Journal article
Palavras-chave: ACC synthase; Bioavailability; Ethylene; Metallic elements; Seed germination; Soybean.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000500001

AgNO3: a potential regulator of ethylene activity and plant growth modulator
Provedor de dados: Electronic Journal of Biotechnology
Autores: Kumar,Vinod; Parvatam,Giridhar; Ravishankar,Gokare Aswathanarayana.
The aim of this review is to critically analyze the role of silver nitrate (AgNO3) in modulating plant growth and development. In recent years, basic studies on ethylene regulation opened new vistas for applied research in the area of micro-propagation, somatic embryogenesis, in vitro flowering, growth promotion, fruit ripening, and sex expression. Silver nitrate has proved to be a very potent inhibitor of ethylene action and is widely used in plant tissue culture. Few properties of silver nitrate such as easy availability, solubility in water, specificity and stability make it very useful for various applications in exploiting plant growth regulation and morphogenesis in vivo and in vitro. Silver ion mediated responses seem to be involved in polyamines,...
Tipo: Journal article
Palavras-chave: Calcium; Ethylene; Morphogenesis; Polyamines; Silver nitrate; Somatic embryogenesis.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000200008

Ethylene treatment improves diosgenin accumulation in in vitro cultures of Dioscorea zingiberensis via up-regulation of CAS and HMGR gene expression
Provedor de dados: Electronic Journal of Biotechnology
Autores: Diarra,Sabake T; He,Ji; Wang,Jianbo; Li,Jiaru.
Background: The perennial medicinal herb Dioscorea zingiberensis is a very important plant used for steroid drug manufacturing for its high level of diosgenin in rhizome. Although the stimulation of diosgenin accumulation by ethylene has been reported in a few of plant species, its regulation is not yet characterized at the molecular level, the underlying molecular mechanism remains elusive. Results: In this study, the effects of ethylene on diosgenin biosynthesis in in vitro cultures of D. zingiberensis were described. The results showed that, in samples treated with ethylene at concentration E3 (10(4) dilution of 40% ethephon), the diosgenin biosynthesis was significantly promoted in comparison with the control samples. Treatment with high concentrations...
Tipo: Journal article
Palavras-chave: Diosgenin; Dioscorea zingiberensis; Ethylene; Gene expression.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000500006

Color change and quality response of ‘lane late’ orange submitted to degreening process
Provedor de dados: Engenharia Agrícola
Autores: MACHADO,FRANCISCA L. DE C.; CAJAZEIRA,JOÃO P.; COSTA,JOSÉ M. C. DA.
This study aimed at evaluating the effects of ethylene on peel color and compositional changes in ‘Lane late’ orange stored under refrigerated and ambient conditions. Physiologically mature, but green-peeled, oranges were exposed to ethylene gas under room temperature and high relative humidity for 24 hours. Storage chamber was ventilated with fresh air after 12 hours to mitigate consequences derived from fruit respiration. Both nondestructive analysis, such as peel color (hue angle, chromaticity, and brightness) and weight loss, and destructive ones (soluble solids, titratable acidity, pH, soluble solids to acidity ratio, and puncture force) were performed upon harvest, after degreening, and every three days during eighteen days in storage. Experiment was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus sinensis (L.) Osbeck; Peel Color; Ethylene; Fruit Internal Quality.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000100144

Interactions between plant hormones and heavy metals responses
Provedor de dados: Genetics and Molecular Biology
Autores: Bücker-Neto,Lauro; Paiva,Ana Luiza Sobral; Machado,Ronei Dorneles; Arenhart,Rafael Augusto; Margis-Pinheiro,Marcia.
Abstract Heavy metals are natural non-biodegradable constituents of the Earth's crust that accumulate and persist indefinitely in the ecosystem as a result of human activities. Since the industrial revolution, the concentration of cadmium, arsenic, lead, mercury and zinc, amongst others, have increasingly contaminated soil and water resources, leading to significant yield losses in plants. These issues have become an important concern of scientific interest. Understanding the molecular and physiological responses of plants to heavy metal stress is critical in order to maximize their productivity. Recent research has extended our view of how plant hormones can regulate and integrate growth responses to various environmental cues in order to sustain life. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ABA; Auxin; Brassinosteroid; Ethylene; Abiotic stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200373

1-Methylcyclopropene delays tomato fruit ripening
Provedor de dados: Horticultura Brasileira
Autores: Moretti,Celso Luiz; Araújo,Alessandra L.; Marouelli,Waldir Aparecido; Silva,Washington Luiz C.
Tomato (Lycopersicon esculentum Mill.) fruits, cv. Santa Clara, were harvested at the breaker stage from commercial fields in Brazlândia, Brazil, to investigate the ability of 1-methylcyclopropene (1-MCP) to retard tomato fruit ripening. Fruit without external blemishes were graded for size (diameter = 80±5 mm) and mass (m = 130±10 g), placed inside hermetically sealed boxes, and 1-MCP was applied for 12 hours (T = 22±1°C; RH = 80-85%) at four different concentrations: 0 (control), 250, 500 and 1000 mL.L-1. Fruits were held at ambient conditions (T = 23±2°C; RH 80-85%) for 2 days and then stored inside a cold room (T = 20±1°C; RH = 85-95%). Every 3 days, during a 15-day period, fruits were analyzed for firmness, total soluble solids, titratable acidity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum; Acidity; Color; Carotenoids; Ethylene; Firmness; Postharvest.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362002000400030

Fresh cut yam stored under different temperatures
Provedor de dados: Horticultura Brasileira
Autores: Donegá,Mateus Augusto; Tessmer,Magda Andréia; Mooz,Edinéia D; Dall'Orto,Luigi TC; Sasaki,Fabiana FC; Kluge,Ricardo Alfredo.
The objective of this study was to evaluate the microbiological, physiological and qualitative changes in fresh cut yam (Dioscorea alata) stored at different temperatures. The experimental design was completely randomized in factorial scheme 4x4, with four storage temperatures (5, 10, 15 and 20ºC) and four evaluation periods (0, 3, 6 and 9 days after processing) with four replications. The microbiological analyzes were performed at 0, 3 and 9 days after processing. Fresh cut yam stored at 5ºC kept respiration rate, ethylene production at low levels similar to those found in yam not processed and stored at 20ºC. The weight loss, lightness and psicotrophic bacteria counting in fresh cut yam stored at 5ºC were kept within the trading patterns until the third...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dioscorea alata; Respiration; Ethylene; Microbiology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000200012

Quantificação da respiração e de etileno em vegetais por cromatografia gasosa com detectores em série.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: FRIGHETTO, R. T. S.; TERAO, D.; SASAKI, F. F. C.; CERQUEIRA, T. S.
Resumo: Os tecidos vegetais vivos respiram (consomem oxigênio e liberam dióxido de carbono) e sintetizam etileno que se difundem na fase gasosa através dos espaços intercelulares para fora dos tecidos. Esses gases podem ser produzidos por bactérias, fzação fisiológica das hortaliças e das frutas, pois sua produção varia entre os diferentes órgãos vegetais, estádios de desenvolvimento e maturação. A determinação destes parâmetros permite o estabelecimento de condições adequadas, como a temperatura, embalagem e o controle de gases como oxigênio e dióxido de carbono na atmosfera de armazenamento dos produtos vegetais. O objetivo desta publicação é propor uma nova metodologia para coleta e processamento de amostras e quantificação da respiração e da produção...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Planta; Respiração; Etileno; Amostragem; Plants (botany); Cell respiration; Sampling; Quantitative analysis; Ethylene.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1104649

Differential esterase activity in aerial and root tissues from 6as DHR wheat lines after phytohormonal treatments
Provedor de dados: Journal of Basic and Applied Genetics (BAG)
Autores: Tacaliti,M.S; Tocho,E; Castro,A.M.
Activity of aerial and root esterases in wheat DHR lines of chromosome 6AS was tested. Different patterns were found after applying phytohormone treatments that mimic stress conditions. Ethylene treated plants showed the lowest aerial and root weights; also, the smallest foliar area, in conjunction with absence of esterase activity in more than half of the lines, was observed. Additional studies will contribute to clarify the key role of ET in the expression of defense related genes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethylene; Esterase activity; Defense related genes; Etileno; Actividad de estearasas; Genes relacionados con defensa.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332016000100005

Effect of artificial treading on morphology and ethylene production in four herbage grasses
Provedor de dados: Obihiro University of Agriculture and Veterinary Medicine Academic Repository (OAK)
Autores: Hongo, Akio; Oinuma, Hideyuki; 本江, 昭夫; 生沼, 英之.
Palavras-chave: Artificial treading; Ethylene; Grasses; Injured rate; 人為的踏圧; エチレン; イネ科植物; 被害度.
Ano: 1998
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1284

Tratamentos pré-germinativos em sementes de palmiteiro
Provedor de dados: PFB - Pesquisa Florestal Brasileira
Autores: Ribeiro, Maitê dos Santos; Steffens, Cristiano André; Oliveira, Luciana Magda; Garcia, Cristhyane; Pikart, Tiago Georg; Souza, Gabriely Koerich.
Este trabalho objetivou avaliar a eficiência de tratamentos pré-germinativos na promoção da germinação e crescimento inicial de plântulas de palmiteiro. Os tratamentos avaliados foram: controle, imersão em solução de GA3, exposição ao etileno, imersão em água, imersão em H2SO4, escarificação mecânica, estratificação por 30 dias a 10°C, e escarificação seguida de estratificação. A imersão de sementes em solução de ácido giberélico (GA3; 2000 µL L-1 durante 24 h) ou sua exposição ao etileno (1000 µL L-1 durante 24 h) são eficientes para a promoção da emergência e crescimento inicial de plântulas de palmiteiro.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recursos Florestais; Silvicultura; Tecnologia de Sementes Florestais Euterpe edulis; Dormência; Etileno; Ácido giberélico Euterpe edulis; Dormancy; Ethylene; Gibberellic acid.
Ano: 2015
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/663

Latex production with depolymerizing compounds of actin cytoskeleton in rubber trees
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Zheng-Quan,Gao; Chun-Xiao,Meng; Nai-Hao,Ye.
The objective of this work was to assess stimulated latex flow from rubber trees (Hevea brasiliensis) with saturated macrolide (latrunculin A), 1, 5, and 10% potassium iodide in 2% methylcellulose compared with 0.3% ethylene in 2% methylcellulose (check) and 2% methylcellulose (blank). Latex output and contents of pure rubber, total solid, sucrose, inorganic phosphorus, thiol, and Mg2+ were measured. The treatments containing 1% KI or saturated macrolide increased latex yields compared to the blank with 2% methylcellulose alone. The 1% KI or saturated macrolide treatments were equal to that of 0.3% ethylene check treatment. However, 5 and 10% KI were harmful to bark of rubber trees, even caused prolonged tapping panel dryness.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethylene; Latex yields; Macrolide; Microfilaments; Physiological parameters; Potassium iodide.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000200018

Analysis of methodologies for the study of composition and biochemical carbohydrate changes in harvest and postharvest onion bulbs
Provedor de dados: Phyton: Revista Internacional de Botánica Experimental
Autores: Abrameto1,MA; Pozzo Ardizzi,CM; Gil,MI; Molina,LM.
Costly investments in storage and transport of onion bulbs makes it increasingly important to identify cultivars with the best chance of long-term storage. This paper discusses our own and other researchers' results and laboratory procedures on onion's pungency, soluble solids, dry matter, respiration rate, carbohydrates and catabolism-related enzymes under different storage conditions. The variability in parameters such as carbohydrate composition, pungency, soluble solids and soluble uronic acid concentration in water is growth dependent, and defines the quality of onion bulbs at harvest time. During storage, these parameters can be modified by environmental conditions, presence of pathogens or termination of dormancy. Under postharvest conditions,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium cepa L.; Respiration rate; Sprouting; Ethylene; Non-structural carbohydrates; Enzyme activity.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200003

Note on the germination of Vochysia tucanorum seeds treated with growth regulators
Provedor de dados: Revista Brasileira de Botânica
Autores: Pereira,Bruno F.; Simão,Edson; Terra Filho,João B.; Cardoso,Jean C.; Cardoso,Victor J. M.
(Note on the germination of Vochysia tucanorum seeds treated with growth regulators). The aim of this work was to evaluate the germination response of Vochysia tucanorum Mart. seeds treated with GA3 and CEPA and germinated under white light or darkness. Newly collected seeds from a Cerrado area were stored for 14 days at two temperatures (25 °C ± 2 and 7 °C ± 1). After the storage period the seeds were pre-treated with distilled water (control), gibberellic acid (GA3), 2-chloroethylphosphonic acid (CEPA) and a mixture of GA3 + CEPA. Following this, the seeds were sown in Petri dishes on filter paper moistened with distilled water and germinated in either darkness or white light. The results suggest that seeds are non-photoblastic and non-dormant, however a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CEPA; Ethylene; Gibberellin; Light; Temperature.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000200010

QUALITY PRESERVATION OF ‘LAETITIA’ PLUMS IN ACTIVE MODIFIED ATMOSPHERE STORAGE
Provedor de dados: Revista Brasileira de Fruticultura
Autores: STANGER,MAYARA CRISTIANA; STEFFENS,CRISTIANO ANDRÉ; AMARANTE,CASSANDRO VIDAL TALAMINI DO; BRACKMANN,AURI; ANESE,ROGÉRIO OLIVEIRA.
ABSTRACT Recent studies have shown that passive modified atmosphere storage (MA) delays the ripening of ‘Laetitia’ plums but it increases the incidence of internal browning in comparison to cold storage (CS), possibly due to high CO2 and/or ethylene accumulation inside the package. The aim of this study was to evaluate the effect of active MA conditions [LDPE film (40 µm)] with CO2 absorber combined with low ethylene (LE) on ripening and quality preservation of ‘Laetitia’ plums during storage at 0.5ºC±0.1ºC and RH of 96%±2%. The treatments evaluated were cold storage (CS; 21.0 kPa O2 + &lt;0.03 kPa CO2); nonperforated MA with CO2 absorber; non-perforated MA with CO2 absorber and LE; perforated MA (with two perforations with diameter = 0.5 mm) with CO2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prunus salicina; Internal breakdown; Ethylene; Postharvest; Ripening.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200307

Effect of aminoethoxyvinilglycine (AVG) on preharvest fruit drop and maturity of apples
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Amarante,Cassandro Vidal Talamini do; Simioni,Anderson; Megguer,Clarice Aparecida; Blum,Luiz Eduardo Bassay.
Apple trees cultivars Gala and Fuji were sprayed four weeks before commercial harvest with aminoethoxyvinilglycine (AVG), at doses of 0, 125, or 250 mg L-1, and assessed for preharvest fruit drop, fruit growth, and maturation on tree. In 'Gala', 64 days after AVG spraying, fruit drop for control treatment was 85%, and AVG (at 125 and 250 mg L-1) reduced it to 10%. In 'Fuji', 64 days after AVG spraying, fruit drop for control was 6%, while treatments with AVG (at 125 and 250 mg L-1) increased fruit drop to 10%. AVG was a powerful retardant of fruit maturation for 'Gala' but not for 'Fuji'. In 'Gala', the most affected attribute was the skin background color, followed, in decreasing order, by soluble solids content, the starch index, skin red color, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malus domestica Borkh.; Regulator; Ethylene; Fruit growth; Fruit quality.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452002000300022

Fruit quality of ‘Braeburn’ apple trees sprayed at post-bloom and preharvest with prohexadione-calcium and GA4+7
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Amarante,Cassandro Vidal Talamini do; Silveira,João Paulo Generoso; Freitas,Sergio Tonetto de; Steffens,Cristiano André; Mitcham,Elizabeth J.
Abstract  The objective of this study was to assess the effects of post-bloom (PB) or preharvest (PH) treatments of ‘Braeburn’ apple trees with prohexadione-calcium (ProCa; 300 mg L-1), an inhibitor of gibberellins biosynthesis, or GA4+7 (300 mg L-1) on fruit quality at harvest and after storage (four months at 0±0.5 oC, followed by five days of shelf life). PB treatments started 15 days after full bloom, with one application every week and six applications in total. PH treatments started five weeks before anticipated harvest, with one application every week and four applications in total. Control trees were sprayed with water. GA4+7 PB increased length/diameter ratio, and GA4+7 PH increased titratable acidity (TA) and flesh firmness and slightly reduced...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Anti-gibberellin; Ethylene; Malus domestica Borkh; Maturity; Skin color.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452021000103004

Postharvest quality of ‘Baigent’ apples as a function of single and multiple preharvest spray aminoetoxivinylglycine and ethephon applications
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Soethe,Cristina; Steffens,Cristiano André; Hawerroth,Fernando José; Amarante,Cassandro Vidal Talamini do; Heinzen,Angélica Schmitz; Stanger,Mayara Cristiana.
Abstract The aim of this work was to evaluate the effect of single and multiple pre-harvest spray aminoethoxyvinylglycine (AVG) applications with or without ethephon, in ‘Baigent’ apple trees cultivated under anti-hail screen and harvesting date on fruit quality after storage. The experiment was conducted in a commercial orchard in the municipality of Vacaria/RS, in the 2014/15 and 2015/16 harvests. Treatments consisted of: control (plants sprayed with water); AVG (125 mg L-1, 30 days before the predicted harvest date; BPHD); ethephon (120 mg L-1, seven BPHD); AVG (62.5 mg L-1 + 62.5 mg L-1, 30 and 20 BPHD); AVG (62.5 mg L-1 + 62.5 mg L-1, 30 and 20 BPHD) + ethephon (120 mg L-1, seven BPHD). Fruits of all treatments were harvested at commercial harvest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malus domestica; Growth regulators; Ethylene; Cold storage.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000300302

ETHEPHON AND CALCIUM CHLORIDE, A COMBINATION THAT IMPROVES SKIN COLOR OF ‘RUBI’ TABLE GRAPE
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Scavroni,Joseane; Ferreira,Leonardo Cesar; Ferrarese,Maria de Lourdes Lucio; Ono,Elizabeth Orika; Rodrigues,João Domingos.
ABSTRACT  ‘Rubi’ table grape has wide acceptance of the consumer market due to its affordable price and attractive color as a function of the accumulation of anthocyanins. However, environmental conditions do not always favor the suitable accumulation of these pigments, resulting in commercial devaluation and nutritional depreciation of fruits. Thus, the present study aimed to investigate the effect of application of different ethephon concentrations, associated or not with CaCl2 application, on the skin color and quality of ‘Rubi’ grape berries. First, specific traits of berries treated with 0, 200, 400, 600, 800 mg L-1 ethephon associated with 1.5% CaCl2 solution were evaluated and pH, titratable acidity (TA), soluble solids (SS), berry firmness, total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis vinifera L.; Ethylene; Calcium; Anthocyanins; Flavonols; Sugars; Phenylalanine ammonia lyase; Glutathione S-transferase.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000100103

ETHANOL AND NITRIC OXIDE IN QUALITY MAINTENANCE OF ‘GALAXY’ APPLES STORED UNDER CONTROLLED ATMOSPHERE
Provedor de dados: Revista Brasileira de Fruticultura
Autores: BRACKMANN,AURI; LUDWIG,VAGNER; THEWES,FABIO RODRIGO; ANESE,ROGERIO OLIVEIRA; SCHULTZ,ERANI ELISEU; BERGETTI,MAGNO ROBERTO PASQUETTI.
ABSTRACT  The aim of this work was to evaluate the effect of ethanol and two nitric oxide dose applications on the maintenance of the post-storage quality of ‘Galaxy’ apple during storage under controlled atmosphere (CA). Treatments evaluated were: [1] 1.2 kPa O2 + 2.0 kPa CO2; [2] CA + 20 µL L-1 of nitric oxide, [3] CA + 40 µL L-1 of nitric oxide; [4] CA + 1 ml of ethanol kg-1 fruit. Fruits received treatments before storage and were kept under CA during eight months and seven days of storage at 20 °C. Fruits had been kept on CA for eight months and seven days at 20° C. Fruits treated with ethanol showed higher ethylene production, low flesh firmness, high flesh breakdown, mealiness and acetaldehyde production. Fruits treated with 40 µL L-1 nitric oxide...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethylene; Respiration rate; Fermentation compounds; Malus domestica.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000500302

Carbohydrate levels in the leaves and production consistency of the Ponkan tangerine when thinned out with Ethephon
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Moreira,Rodrigo Amato; Ramos,José Darlan; Cruz,Maria do Céu Monteiro da; Pantoja,Lílian de Araújo; Santos,Alexandre Soares dos.
Management practices that maintain carbohydrate reserves in tangerines are necessary in order to ensure good yields. This experiment was carried out with the object of evaluating the levels of carbohydrates in the leaves, and consistency in the production of the Ponkan tangerine (Citrus reticulata Blanco) when subjected to chemical thinning with five concentrations of Ethephon for three consecutive years. The Ponkan tangerine evaluated had been grafted onto Rangpur lime (Citrus limonia Osbeck), cultivated with a spacing of 6.0 x 3.0 m and were 12 years old. The Ethephon concentrations tested were: 0; 200; 400; 600 and 800 mg L-1, applied in January of 2009; 2010 and 2011, when the fruits were of 25 to 30mm in transverse diameter. The experimental design...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus reticulata Blanco; Chemical thinning; Alternate bearing; Ethylene.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300020

Temperature-related changes in respiration and Q10 coefficient of Guava
Provedor de dados: Scientia Agricola
Autores: Bron,Ilana Urbano; Ribeiro,Rafael Vasconcelos; Cavalini,Flávia Cristina; Jacomino,Angelo Pedro; Trevisan,Marcos José.
Guava (Psidium guajava L.) is a tropical fruit that presents fast post-harvest ripening; therefore it is a very perishable product. Inappropriate storage temperature and retail practices can accelerate fruit quality loss. The objective of this study was to evaluate the respiratory activity (RA), the ethylene production (EP) and Q10 of guava fruit at different storage temperatures. 'Paluma' guava fruits were harvested at maturity stage 1 (dark-green skin) and stored at either 1, 11, 21, 31 or 41ºC; RA and EP were determined after 12, 36, 84 and 156 h of storage. RA and EP rates at 1 and 11ºC were the lowest - 0.16 and 0.43 mmol CO2 kg-1 h-1 and 0.003 and 0.019 µmol C2H4 kg-1 h-1, respectively. When guavas were stored at 21ºC, a gradual increase occurred in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava; Ethylene; Ripening.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500008

Optimization of in vitro organogenesis in passion fruit (Passiflora edulis f. flavicarpa)
Provedor de dados: Scientia Agricola
Autores: Trevisan,Flavio; Mendes,Beatriz Madalena Januzzi.
In vitro organogenesis of passion fruit was studied by the induction of adventitious buds from leaf discs in culture media supplemented with benzyladenine (BAP) or thidiazuron (TDZ). To minimize adverse effects of ethylene accumulation on shoot development, silver nitrate (AgNO3) was added to the induction media. Both BAP (0; 2.2; 4.4; 6.6 µmol L-1) and TDZ (0; 1.1; 2.2; 3.4 µmol L-1) were effective in promoting shoot development. Although no significant differences were detected using AgNO3 (23.5 µmol L-1), buds grown in AgNO3-supplemented media were more vigorous. The number of explants with buds obtained using TDZ and AgNO3-supplemented media (5.6) were higher than those obtained using BAP and AgNO3 (3.0). MSM + giberrellic acid (GA3), MSM + coconut...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Ethylene; Silver nitrate; Thidiazuron; Tissue culture.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000400007

Respiratory quotient: innovative method for monitoring ‘Royal Gala’ apple storage in a dynamic controlled atmosphere
Provedor de dados: Scientia Agricola
Autores: Weber,Anderson; Brackmann,Auri; Both,Vanderlei; Pavanello,Elizandra Pivotto; Anese,Rogério de Oliveira; Thewes,Fabio Rodrigo.
Apples (Malus domestica, Borkh.) which are not stored at low temperature or in a properly controlled atmosphere (CA) may have a high metabolic rate during the postharvest stage resulting in losses in quality. The aim of this study was to evaluate the quality of ‘Royal Gala’ apple fruit stored in accordance with a new method of dynamic controlled atmosphere (DCA).The respiratory quotient (RQ) was monitored at two temperatures which were then compared using a commercially available technology based on chlorophyll fluorescence DCA (DCA-CF) and static CA. Ethylene production and respiration rates were lower in apples stored in DCA than in CA, as a result of lower 1-aminocyclopropane-1-carboxylate oxidase activity, especially in apples stored in DCA-RQ2. Flesh...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethanol; Ethylene; Physiological disorders; Chlorophyll fluorescence.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000100028

Shelf life of peaches treated with 1-methylcyclopropene
Provedor de dados: Scientia Agricola
Autores: Kluge,Ricardo Alfredo; Jacomino,Angelo Pedro.
Peaches [Prunus persica (L.) Bastch] present reduced post-harvest shelf life, partially, due to their high respiratory rate and fast ripening. These processes are related to ethylene production, as well as its action. Peaches, cv. Aurora-1, were picked at two different ripening stages (mature green and ripe) and treated with 1-methylcyclopropene (1-MCP), the ethylene's competitive antagonist, at concentrations of 0, 100, 300 and 900 nL L-1 for 12 hours at 25ºC. After treatment, the fruits were stored at room temperature (25ºC) for six days. Fruits treated with 1-MCP presented better firmness and less ground color loss than non-treated fruits. The 1-MCP antagonist reduced the development of fruit rot at the mature green stage, but not at the ripe one. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prunus persica; 1-MCP; Ethylene; Storage; Firmness.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000100010

Potassium permanganate effects on the quality and post-harvest conservation of sapodilla ( Manilkara zapota (L.) P.Royen) fruits under modified atmosphere
Provedor de dados: Acta Agronómica
Autores: de Souza Freitas,Wallace Edelky; Bezerra Almeida,Maria Lucilania; Dantas de Morais,Patrícia Lígia; da Curnha Moura,Angélica Kaynne; Sales Júnior,Rui.
Abstract Sapodilla (Manilkara zapota (L.) P. Royen) is a climacteric fruit, very perishable, with high metabolic activity, rapid ripening and reduced storage time at room temperature, thus making difficult its commercialization. However, this research aimed to evaluate the effect of potassium permanganate (KMnO4) on the quality and post-harvest conservation of sapodilla fruit under modified atmosphere at room temperature. The sapodilla fruits were harvested when they reached physiological maturity and then accommodated in Styrofoam trays with PVC film coating. Within each package, KMnO4 were placed at different concentrations (0, 0.250, 0.375, and 0.500 g of KMnO4 per kg of fruit, respectively), impregnated in vermiculite. In addition, were kept in storage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethylene; Fruit quality analysis; Physiological maturity; Postharvest conservation; Storage time.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000300331

Leaf carbohydrates in ‘Ponkan’ mandarin fruit quality under chemical thinning - doi: 10.4025/actasciagron.v35i3.16219
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Moreira, Rodrigo Amato; Universidade Federal de Lavras; Ramos, José Darlan; Universidade Federal de Lavras; Cruz, Maria do Céu Monteiro da; Universidade Federal dos Vales Jequitinhonha e Mucuri; Pantoja, Lílian de Araújo; Universidade Federal dos Vales Jequitinhonha e Mucuri; Santos, Alexandre Soares dos; Universidade Federal dos Vales Jequitinhonha e Mucuri.
This study was performed to verify the influence of the levels of leaf carbohydrates on the fruit quality of ‘Ponkan’ mandarin trees subjected to chemical thinning for three years using different Ethephon concentrations. Five concentrations of Ethephon were tested: 0, 200, 400, 600 and 800 mg L-1, which were applied during the stage of fruit development when fruits were from 25 to 30 mm in transverse diameter. The experimental design was in randomized blocks, with four blocks and four plants per plot. Interactions were observed between the concentrations of Ethephon and the year of assessment for the percentage of thinning, transverse diameter, longitudinal diameter, mass, soluble solids, acidity and the ratio of fruits. For the contents of carbohydrates,...
Tipo: Pesquisa Empírica de Campo
Palavras-chave: 5.01.03.00-8 Citrus reticulata Blanco; Ethylene; Growth regulators Fitotecnia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16219

Germination and biochemical changes in ‘Formosa’ papaya seeds treated with plant hormones
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Zanotti, Rafael Fonsêca; Dias, Denise Cunha Fernandes dos Santos; Barros, Raimundo Santos; DaMatta, Fábio Murilo; Oliveira, Glauter Lima.
This study aimed to investigate the effects of growth regulators on germination rates and biochemical compound concentrations in Carica papaya L. seeds (‘Formosa’ group). The seeds were harvested from fruits at maturation stages 3 and 5 (50 and 75% yellow fruit skin, respectively). The effects of 2-chloroethylphosphonic acid (CEPA), KNO3 and gibberellic acid (GA3)on seed germination, germination index speed, soluble sugars, starch, lipids, soluble proteins and total proteins of the papaya seeds were evaluated. The seeds from stage 5 showed a higher rate of germination 30 days after sowing than did the seeds from stage 3. Treatment with CEPA decreased seed germination, apparently due to decreased starch mobilization; the opposite response was observed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.06-7 Carica papaya L; CEPA; Ethylene; Gibberellins; KNO3; Reserve compounds.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18057

Ethanol reduces ripening of 'Royal Gala' apples stored in controlled atmosphere
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: WEBER,ANDERSON; BRACKMANN,AURI; BOTH,VANDERLEI; PAVANELLO,ELIZANDRA P.; ANESE,ROGERIO O.; SCHORR,MÁRCIO R.W.
This work aims at evaluate ethanol effect of acetaldehyde application in post-storage quality of 'Royal Gala' apples maintenance, and to compare them with consolidated storage techniques. Thus two experiments were performed during the years of 2008 and 2009. In the first experiment (2008), the application of ethanol, acetaldehyde or 1-MCP and ethylene scrubbing were tested. Fruits were stored in controlled atmosphere (CA) with 1.0kPa O2 and 2.0kPa CO2 at 0.5°C. In the second experiment (2009), the treatments tested were ethanol application combined or not with low relative humidity (LRH) and LRH alone. In this experiment, apples were stored in CA with 1.2kPa O2 + 2.5kPa CO2 at 0.5°C. After eight months of storage, 0.5 mL ethanol kg-1 apples month-1 or 0.25...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acetaldehyde; Anaerobic respiration; Ethylene; Quality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100403

Supraoptimal ethylene acts antagonistically with exogenous gibberellins during Solanum lycopersicum (Solanaceae) hypocotyl growth
Provedor de dados: Boletín de la Sociedad Argentina de Botánica
Autores: Mignolli,Francesco; Rojas,Graciela Beatriz; Vidoz,María Laura.
In many plant species, ethylene and gibberellins interact to regulate plant growth and development. In some cases, these hormones can act in a synergistic way whereas in others they can be antagonistic. To date, the control of hypocotyl elongation by ethylene and gibberellins has been poorly explored in tomato. In this paper, we report that, application of exogenous ethylene to tomato seedlings or high endogenous ethylene production, as in the epinastic mutant, strongly prevent the effect of gibberellic acid (GA3) application. Moreover, constitutive activation of gibberellin signal in a DELLA deficient mutant is not able to counteract the inhibitory effect of ethylene on hypocotyl elongation, suggesting that ethylene acts independently from DELLA-mediated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethylene; Gibberellins; Tomato; Hypocotyl elongation.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000200004

Extremely low oxygen partial pressures for the storage of ‘Royal Gala’ apple
Provedor de dados: Bragantia
Autores: Berghetti,Magno Roberto Pasquetti; Brackmann,Auri; Thewes,Fabio Rodrigo; Schultz,Erani Eliseu; Ludwig,Vagner; Wendt,Lucas Mallmann; Thewes,Flavio Roberto; Schmidt,Suele Fernanda Prediger.
ABSTRACT The aim of this study was to evaluate the effect of storing ‘Royal Gala’ apple under extremely low oxygen partial pressures on their anaerobic metabolism, ethylene production and fruit quality after 9 months of storage plus 7 days of shelf life at 20 °C. The storage conditions tested were: 1.2 kPa O2 + 2.0 kPa CO2; 0.7 kPa O2 + 1.5 kPa CO2; 0.5 kPa O2 + 1.2 kPa CO2; 0.4 kPa O2 +1.2 kPa CO2 and 0.25 kPa O2 + 0.0 kPa CO2. The fruit storage temperature was 1.0 °C (± 0.1). Fruit stored at 0.4 kPa O2 + 1.2 kPa CO2 maintained higher flesh firmness and a higher percentage of healthy fruit. The fruit stored under the 0.25 kPa O2 + 0.0 kPa CO2 condition had lower flesh firmness as well as a reduced percentage of healthy fruit and a high production of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic metabolism; Ethyl acetate; Ethylene; Malus domestica; Physiological disorders.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020005001202

Study of banana (Musa aaa Cavendish cv Nanica) trigger ripening for small scale process
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Larotonda,Fábio Donato Soares; Genena,Aziza Kamal; Dantela,Daniela; Soares,Hugo Moreira; Laurindo,João Borges; Moreira,Regina Fátima Peralta Muniz; Ferreira,Sandra Regina Salvador.
The present work focuse on the impact of O2, CO2 and ethylene concentrations on ripening rate control of bananas as a contribution for the development of domestic equipments that could allow the user to drive the fruit shelf live. It represented the adjustment of metabolic activity rates in order to manage the maturity process. Ripening variables such as ethylene and CO2 concentrations and temperature were adjusted to accelerate or slow down the process, while the maturity degree was monitored through the physical and chemical parameters and sensorial analysis. Therefore, the objective of this work was to evaluate the influence of these parameters to manage the banana ripening. The optimum temperature was at 25 ÂºC of storage. The presence of oxygen, CO2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Banana; Ripening; Trigger; Ethylene; CO2.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500021

Metabolic activity of fresh-cut 'Pérola' pineapple as affected by cut shape and temperature
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Antoniolli,Lucimara R.; Benedetti,Benedito C.; Sigrist,José M.M.; Souza Filho,Men de Sá M.; Alves,Ricardo E.
The effects of cut shape and temperature on the respiratory activity and ethylene synthesis of fresh-cut 'Pérola' pineapple were investigated. Two experiments were carried out. In the first, slices and chunks were placed in air-tight packages kept at 4 or 10ºC. Gas samples were taken every 2 h during 12 h and analysed by gas chromatography. In the second experiment, peeled fruits, slices and chunks were placed in air-tight glass jars connected to a flowboard installed in a cold room at 5 ± 1ºC. This system provided a continuous flow of humid and cold air during 14 d. Respiration rate was determined every 2 h, during the first 12 h, then daily for 10 d and on days 12 and 14. Ethylene synthesis was not detected during 12 h of evaluation. The lower...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Ananas comosus; Ethylene; Minimal processing; Respiration rate.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300008

Ethylene production and acc oxidase gene expression during fruit ripening of Coffea arabica L.
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Pereira,Luiz Filipe Protasio; Galvão,Rafaelo M.; Kobayashi,Adilson K.; Cação,Sandra Maria B.; Vieira,Luiz Gonzaga Esteves.
The phytohormone ethylene is involved in several physiological and developmental processes in higher plants, including ripening of fruits, abscission of organs and tissues, senescence, wound response as well as in other abiotic stresses. The enzyme 1-aminocyclopropane-1-carboxylate oxidase (ACO) catalyzes the last step of ethylene biosynthesis. The production of ethylene and the expression of a Coffea arabica ACO gene during the last stages of fruit maturation were investigated. A rapid increase of ethylene production at the green-yellow stage of fruit ripening, after the end of endosperm formation, and a decrease of ethylene production at the cherry stage indicates a climacteric phase during ripening. An ACC oxidase (Ca-ACO) from coffee fruit cDNA was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ACC oxidase; Climacteric; Coffee; Ethylene; Maturation.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000300002

Alterations in leaf anatomy and physiology caused by the red mite (Oligonychus ilicis) in plants of Coffea arabica
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Fahl,Joel I.; Queiroz-Voltan,Rachel B.; Carelli,Maria Luiza C.; Schiavinato,Marlene A.; Prado,Ana K. S.; Souza,Júlio C.
Three degrees of red mite infestation (Oligonychus ilicis McGregor) (Acari: Tetranychidae) were evaluated with regard to leaf anatomy, photosynthetic gas exchange and leaf ethylene production, in a commercial crop of approximately 12-year-old trees of Coffea arabica 'Catuaí Vermelho'. As a complementary study, foliar anatomy was also evaluated in a recuperated crop of C. arabica 'Mundo Novo' that had presented a high degree of red mite infestation during the dry period of the prior growing season. The red mite-infested leaves were bronze-coloured, with intensity proportional to the degree of internal damage. On feeding, the red mite introduces its stylet in the adaxial epidermis and, as a result, chloroplasts are destroyed in the feeding area. The number...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffee; Ethylene; Leaf structure damage; Photosynthetic gas exchange.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000100007

Germination of dormant seeds of Stylosanthes humilis as promoted by ethylene accumulation in closed environments
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Ribeiro,Dimas Mendes; Barros,Raimundo Santos.
Germination of scarified dormant seeds of Townsville stylo (Stylosanthes humilis) is very low in Petri dishes, but may be appreciable in sealed Erlenmeyer flasks if ethylene accumulates in their atmospheres. When ethylene in the flask atmosphere was fixed by a mercuric perchlorate solution, emanation of the gaseous regulator and germination of dormant seeds were drastically decreased. On the other hand, ethylene produced by dormant seeds and accumulated in the flask atmosphere led to a further enhancement of ethylene accumulation and a corresponding increased seed germination. Germination of both dormant and non-dormant seeds did not occur when ethylene biosynthesis was completely blocked.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Townsville stylo; Closed environments; Dormancy; Ethylene; Germination; Seeds.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000200003

Oxidative processes during 'Golden' papaya fruit ripening
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Resende,Evellyn Couto Oliveira; Martins,Paula Fabiane; Azevedo,Ricardo Antunes de; Jacomino,Angelo Pedro; Bron,Ilana Urbano.
'Golden' papayas at maturity stage 1 (15% yellow skin) were chosen to study selected oxidative processes, the activity of antioxidant enzymes and lipid peroxidation in storage at 22°C, during the ripening of the fruit. An increase in ethylene production was observed on the second day of storage and it was followed by an increase in respiration. An increased activity of catalase, glutathione reductase and ascorbate peroxidase was observed concurrently or soon after this increase in ethylene production and respiration. The increased activity of these enzymes near the peaks of ethylene production and respiration is related to the production of oxidants accompanying the onset of ripening. On the fourth day of storage, there was an increased lipid peroxidation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carica papaya; Antioxidant system; Climacteric; Ethylene; Lipid peroxidation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000200002

Cell wall biochemistry of sapodilla (Manilkara zapota) submitted to 1-methylcyclopropene
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Morais,Patrícia L.D.; Miranda,Maria R.A.; Lima,Luis C.O.; Alves,José D.; Alves,Ricardo E.; Silva,José D.
Sapodilla (Manilkara zapota) is a climacteric fruit that ripens shortly after harvest. Studies on its conservation during storage have been mainly restricted to using low temperatures and modified atmospheres. In this study we investigated the influence of 1-methylcyclopropene (1-MCP) on the physiological and biochemical changes that sapodilla cell wall undergoes during ripening and evaluated its potential to preserve sapodilla fruits at postharvest. Fruits were treated with ethylene antagonist 1-MCP at 300 nL L-1 for 12 h and then stored under a modified atmosphere at 25ºC for 23 d. 1-MCP significantly delayed softening of sapodilla for 11 d as a consequence of inhibition of cell wall degrading enzyme activities, and thus 1-MCP-treated fruit exhibited a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cell wall hydrolases; Ethylene; Hemicellulose; Neutral sugar; Fruit ripening; Uronides.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200001

Possible involvement of proteasome activity in ethylene-induced germination of dormant sunflower embryos
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Borghetti,Fabian; Noda,Fabio Nakamura; Sá,Cezar Martins de.
Freshly harvested sunflower seeds (Helianthus annuus L., Asteraceae) present physiological dormancy localized at the embrionary axis which prevents germination at low temperatures. However, dormant embryos reach about 100 % germination when incubated with the phytohormone ethylene during imbibition. To examine whether proteinase activities are implicated in the breaking of dormancy by ethylene, dormant embryos were treated with the proteinase inhibitors leupeptin, E64 and the proteasome specific inhibitor clasto-lactacystin ß-lactone (lactacystin). A few embryos (&lt; 10 %) germinated at 10 ºC in absence of ethylene but ethylene-treated embryos reached high germinability (~90 %) in the presence of leupeptin, E64, water and DMSO. On the other hand,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus; Dormancy; Ethylene; Lactacystin; Proteasome.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000200007

Growth regulators and essential oil production
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Prins,Cláudia L; Vieira,Ivo J. C; Freitas,Silvério P.
The aroma and fragrance industry is a billion-dollar world market which grows annually. Essential oils comprise the majority of compounds used by these industries. These sets of metabolites are formed mainly by monoterpenes, which are products of the plants' secondary metabolism. Biosynthesized from mevalonate and methylerythitol phosphate, the essential oil production depends not only on genetic factors and the developmental stage of plants, but also on environmental factors which could result in biochemical and physiological alterations in plants modifying the quantity and quality of the essential oil. These modifications impair aromatic plant production aimed at essential oil by reducing their quality. It is desirable to develop techniques of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxins; Cytokinins; Gibberellins; Ethylene; Jasmonate; Terpenoids.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000200003

Ripening and quality of 'Golden' papaya fruit harvested at different maturity stages
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Bron,Ilana U.; Jacomino,Angelo P.
The objective of this study was to determine how ripening physiology and quality of 'Golden' papaya are affected by maturity stages at harvest. Papayas were harvested at four maturity stages (Stage 0: totally green; Stage 1: up to 15% of yellow skin; Stage 2: 16-25% of yellow skin; Stage 3: 26-50% of yellow skin) and evaluated during ripening at 23ºC. Physical and physico-chemical (skin color, pulp firmness, soluble solids, titratable acidity, and ascorbic acid), physiological (respiratory activity and ethylene production), and sensorial (flavor, odor, firmness, and appearance) characteristics were evaluated. Regardless of maturity stages, fruit showed similar variation in respiration rate, exhibiting constant values after the 2nd day of storage at 23ºC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carica papaya; Ethylene; Harvest time; Postharvest; Respiration.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300005

Ethylene and abscisic acid in the control of development of the rhizome of Kohleria eriantha (Benth.) Hanst. (Gesneriaceae)
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Almeida,Julieta Andrea Silva de; Kascheres,Concetta; Pereira,Maria de Fátima D.A.
Kohleria eriantha has rhizomes which are underground stems with buds enclosed by modified leaves, that store starch. The buds of this rhizome can develop in two morphological patterns: an aerial shoot (similar to the mother plant) or a rhizome, depending on the water level present in the substrate. Development of the shoot was inhibited by low water availability (1 mL) in the substrate. It was verified that ethylene and ABA were involved in controlling the development of the rhizome pattern under low water availability. Treatments with ethrel, PEG and ABA induced shoot development whereas treatments with AgNO3 or AVG inhibited shoot development. Increased ethylene and ABA were observed under conditions that inhibited shoot development. Moreover, it is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abscisic acid; Buds; Ethylene; Meristem; Rhizome.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000400007

Ripening of "Pedro Sato" guava: study on its climacteric or non-climacteric nature
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Azzolini,Marisa; Jacomino,Angelo Pedro; Bron,Ilana Urbano; Kluge,Ricardo Alfredo; Schiavinato,Marlene Aparecida.
Guava (Psidium guajava L.) is a tropical fruit exhibiting rapid post-harvest ripening. However, the physiological basis involved in the ripening process of guava is not totally clear, which makes it difficult to develop technologies to enhance fruit storability. Two experiments were carried out with the objective of determining the ripening behavior of 'Pedro Sato' guavas. In the first experiment, guava fruits at three maturity stages (I - dark green, II - light green and III - yellow-green) were stored at room temperature (23 ± 1°C and 85 ± 5 % RH). The respiratory rate, ethylene production, pulp and skin colours, and firmness were evaluated. In the second experiment, ethylene and 1-methylcyclopropene (1-MCP) were applied to guavas at the light green...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava; Ethylene; 1-methylcyclopropene; Respiration.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000300004

Heat treatment effects on ACC oxidase activity of 'Keitt' mangoes
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Bender,Renar João; Seibert,Eduardo; Brecht,Jeffrey K.
With the use of ethylene dibromide for mango disinfestation being ruled out, vapor heat or hot water treatments are the only alternatives for quarantine treatments of mangoes. Physical treatments such as heat treatments have been implicated in higher incidence of physiological disorders and enhancement of ripening processes. Therefore, the objective of the present work was to determine the effects of hot water treatments on ethylene production and on the in vitro activity of ACC oxidase. Cv. Keitt mangoes were immersed for 3 min in hot water at 53 °C or 90 min in water at 46 °C. Immediately after the treatments, some of the mangoes were analyzed for ACC oxidase activity and others were stored to be analyzed after 4 days at 12 °C. There was a significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethylene; Ethylene dibromide; Heat treatment; Mangifera indica L.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000300003

Effect of the Cooling System and 1-MCP on the Incidence of Superficial Scald in ‘Granny Smith’ Apples
Provedor de dados: Chilean Journal of Agricultural Research
Autores: Moggia,Claudia; Hernández,Omar; Pereira,Marcia; A. Lobos,Gustavo; Yuri,José Antonio.
A study was carried out to determine the effects of two cooling systems and the application of 1-methylcyclopropene (1-MCP, SmartFreshTM) on the incidence of superficial scald in apples (Malus domestica Borkh.) cv. Granny Smith. Fruit were collected from a commercial orchard (Colbún, Maule Region, Chile) during 2004-2005 season. A completely randomized design was used in a 2 x 2 factorial arrangement, using cooling systems (normal and step-wise cooling) and application of 1-MCP (0 and 625 nL L-1 i.a.) as the main factors. Fruit from normal cooling were kept at 0 °C throughout the storage period (180 days). Step-wise cooling consisted of storing the fruit at 10 °C for 10 days; 4 °C for the next 20 days and 0 °C for the remaining 150 days. Every month,...
Tipo: Journal article
Palavras-chave: Conjugated trienes; Antioxidants; -farnesene; 1-methylcyclopropene; Physiological disorder; Ethylene.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300011

Longevity of Oncidium varicosum (Orchidaceae) inflorescences treated with 1-methylciclopropene
Provedor de dados: Ciência Rural
Autores: Mattiuz,Claudia Fabrino Machado; Mattiuz,Ben-Hur; Rodrigues,Teresinha de Jesus Deléo; Pietro,Júlia de; Martins,Ramilo Nogueira; Grossi,Selma de Fátima.
Oncidium varicosum belongs to Orchidaceae family and nowadays it is commercialized on large scale due to its potential as cut flower. The species distinguishes decoratively in function of the high number of flowers golden yellow that compose its great and delicate inflorescence. The hormone ethylene performs an important function in the processes related with the senescence of cut flowers, and especially in relation to orchids anti-ethylene treatments are recommended to extend the vase life. Among chemicals used today for the postharvest treatment of flowers the 1-methylciclopropene (1-MCP) is an efficient inhibitor of autocatalytic production of ethylene. This research aimed to evaluate the effect of different concentrations of 1-methylciclopropene...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Postharvest; Orchids; Cut flowers; 1-MCP; Ethylene.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000600006

Thidiazuron affects the quality of 'Gala' apples stored under controlled atmosphere
Provedor de dados: Ciência Rural
Autores: Giehl,Ricardo Fabiano Hettwer; Sestari,Ivan; Eisermann,Ana Cristina; Brackmann,Auri.
This work was carried out aiming to evaluate the effect of thidiazuron (TDZ) on the quality of 'Gala' apples stored under controlled atmosphere (CA) conditions. Plants were sprayed at full bloom with TDZ at 0, 10, 20, or 40g ha-1 (a.i.). Harvested fruits were then stored in CA with 1.0+2.5, 1.5+2.5 and 1.5+5.0 (kPa O2+kPa CO2), both at 0.5°C. In addition, the partial pressure of 1.5kPa of O2+2.5kPa of CO2 was also evaluated at -0.5°C. Higher flesh firmness and titratable acidity was obtained by applying 20 or 40g ha-1 TDZ. Furthermore, these TDZ doses decreased the respiration rate as well as the occurrence of flesh breakdown, mealiness and decay. The application of TDZ at doses ranging from 20 to 40g ha-1 maintains higher fruit quality for up to 8 months...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenylurea; Cytokinin; Ethylene; Postharvest.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000400011

1-Methylcyclopropene and Aminoethoxyvinylglycine effects on yield components of field-grown cotton
Provedor de dados: Ciência e Agrotecnologia
Autores: Brito,Giovani Greigh de; Ferreira,Alexandre Cunha de Barcellos; Borin,Ana Luiza Dias Coelho; Morello,Camilo de Lelis.
Biotic and abiotic stresses can alter the hormone balance and trigger the activation of pathways involved in the cotton stress responses, resulting in the abscission of squares, flowers and young bolls and consequent reductions in the seed cotton yield and fiber yield. As part of the mechanism that primarily regulates the protective response of plants against stresses, ethylene is considered a key hormone involved in this response, and increased ethylene synthesis has been observed when plants are subjected to stress. Thus, the development of strategies aimed to mitigate their negative effects can reduce the shed rate of reproductive structures and positively impact cotton productivity. For this purpose, 1-methylcyclopropene (1-MCP), a compound that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AVG; 1-MCP; Ethylene; Gossypium hirsutum.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000100001

Postharvest conservation of alstroemeria ‘ajax’ using 1-methylcyclopropene
Provedor de dados: Ciência e Agrotecnologia
Autores: Galati,Vanessa Cury; Muniz,Ana Carolina Corrêa; Guimarães,João Emmanuel Ribeiro; Inestroza-Lizardo,Carlos Orlando; Mattiuz,Claudia Machado Fabrino; Mattiuz,Ben-Hur.
ABSTRACT Cut flowers deteriorate quickly and require postharvest technologies to increase their durability, which is usually around 8 days. Due to the scarce information related to postharvest physiology of Alstroemeria cut flowers, this study aimed to verify the best dose of 1-methylcyclopropene (1-MCP) to the postharvest conservation of inflorescences of Alstroemeria cv. Ajax, considering the factors associated with floral senescence and loss of the decorative life. The stems were submitted to four doses of 1-MCP (0; 100; 250; 500 ppb), then placed in containers with distilled water and stored at room temperature (22 ºC). The treatments were performed in triplicate containing three stems per replicate. The evaluations were performed every three days for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethylene; Longevity; Pigments; Enzyme activity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000200181