Consulta: subjectFacets:"Auxin"
Registros recuperados: 35
Data/hora: 06/06/2024 02:16:58

Propagación vegetativa de Pinus leiophylla Schiede Ex Schltdl. Et Cham.
Provedor de dados: 32
Autores: Cuevas Cruz, Juan Carlos.
Se probó el enraizado de estacas, acodo aéreo e injerto para clonar genotipos de un huerto semillero de P. leiophylla, putativamente resistentes al ataque de Dendroctonus sp. y Toumeyella pinicola Ferris. y que además muestran las mejores características fenotipicas. Con el primer método se clonó a la progenie, mientras que los otros métodos se desarrollaron para clonar a los árboles madre. En el enraizado de estacas se evaluó el efecto del substrato, tipo de estaca y concentración de ácido indolbutírico (AIB). Se utilizaron dos tipos de substrato (100 % de agrolita vs. una mezcla de turba-agrolita-vermiculita 1:1:1), dos tipos de estaca (apicales vs. basales) y dos concentraciones de AIB (0 vs. 10, 000 ppm). En el acodo aéreo se evaluó el efecto de cuatro...
Palavras-chave: Enraizado de estacas; Acodo aéreo; Injerto; Auxina; Raíces; Rooting cuttings; Air layering; Graft; Auxin; Roots; Ciencias Forestales; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2347

Gene expression of a putative glutathione S-transferase is responsive to abiotic stress in embryogenic cell cultures of Cyclamen persicum
Provedor de dados: 69
Autores: Hoenemann,Claudia; Ambold,Juliane; Hohe,Annette.
Background: Cyclamen persicum is an economically important ornamental crop that is propagated exclusively through seeds as vegetative propagation using cuttings is not possible. Therefore a micropropagation method through somatic embryogenesis is of high interest; however the method suffers from low reliability concerning quality and quantity of the produced plantlets. A crucial step of the protocol is the removal of plant growth regulators (PGRs) that triggers embryo development. In order to get a better insight in this crucial step of the propagation process, a gene expression analysis has been set up using five different genes of glutathione S-transferases (GST) as these are known to be auxin responsive as well as stress reactive. Results: One out of...
Tipo: Journal article
Palavras-chave: Auxin; Callus; Micropropagation; Semisolid medium; Suspension culture.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000100006

Influence of 2,4-D and BAP on callus growth and the subsequent regeneration of somatic embryos in long-term cultures of Pelargonium x domesticum cv. Madame Layal
Provedor de dados: 69
Autores: Haensch,Klaus-Thomas.
This long-term study demonstrates for the first time that it is possible to propagate embryogenic cultures in pelargoniums and to subsequently initiate the differentiation of embryos using the cultivar Madame Layal (Pelargonium x domesticum). Propagation of callus was only possible with combinations of 2,4-dichlorophenoxyacetic acid (2,4-D) and 6-benzylaminopurine (BAP), which gave rise to embryos from the primary culture stage on. However, the propagation of cells, as well as the differentiation of embryos, was inhibited by a continuous application of these growth regulators. For this reason, a long period on medium lacking growth regulators was necessary before the differentiation of embryos occurred again. The consequences for improving the propagation...
Tipo: Journal article
Palavras-chave: Auxin; Cytokinin; Propagation; Somatic embryogenesis.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000100007

Normalized embryoid cDNA library of oil palm (Elaeis guineensis)
Provedor de dados: 69
Autores: Chan,Pek-Lan; Ma,Lay-Sun; Low,Eng-Ti L; Shariff,Elyana M; Ooi,Leslie Cheng-Li; Cheah,Suan-Choo; Singh,Rajinder.
A normalized embryoid cDNA library (EON) was constructed based on reassociation kinetics reaction. Results from dot blot hybridization and sequencing of EON cDNA clones clearly indicated that the normalization process reduced the frequency of high abundance transcripts and increased the frequency of low abundance gene transcripts. A total of 553 non-redundant expressed sequence tags (ESTs) were identified, 325 of these were not observed in the standard oil palm cDNA libraries sequenced previously. A total of 10 EON cDNA clones were chosen for expression profiling across samples from different stages of the tissue culture process. Two of the genes exhibited promising expression patterns for predicting the embryogenic potential in callus. Some of these genes...
Tipo: Journal article
Palavras-chave: Auxin; Expressed sequence tags; Gene expression; Low abundance genes; Tissue culture.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000100010

CHEMICAL AGENTS AND SHADING LEVELS FOR THE PRODUCTION OF PEPPER SEEDLINGS
Provedor de dados: 70
Autores: Binotti,Eliana D. C.; Costa,Edilson; Binotti,Flávio F. da S.; Batista,Thiago B.
ABSTRACT The aim of this study was to evaluate protected cultivation environments with different levels of shading and application of foliar chemical agents, on growth, photosynthetic pigments and seedling quality of Capsicum frutensens L. The experiment was developed at the State University of Mato Grosso do Sul, University Unit of Cassilândia, with chili pepper. Three cultivation environments (screen of 18, 35 and 50% of shading) and six leaf chemical agents were used [(1) control – without application; (2) Nitrogen (N) 1%; (3) Paclobutrazol 50 mg L-1 + N 1%; (4) Auxin 0.05 g L-1 + N 1%; (5) Gibberellin 0.05 g L-1 + N 1%; and (6) Auxin 0.05 g L-1 + Gibberellin 0.05 g L-1 + N 1%]. Each environment was considered an experiment in which the completely...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Capsicum frutensens L; Gibberellin; Light; Nitrogen; Paclobutrazol.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400450

Interactions between plant hormones and heavy metals responses
Provedor de dados: 74
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

YUCCA4 overexpression modulates auxin biosynthesis and transport and influences plant growth and development via crosstalk with abscisic acid in Arabidopsis thaliana
Provedor de dados: 74
Autores: Munguía-Rodríguez,Aarón Giovanni; López-Bucio,Jesús Salvador; Ruiz-Herrera,León Francisco; Ortiz-Castro,Randy; Guevara-García,Ángel Arturo; Marsch-Martínez,Nayelli; Carreón-Abud,Yazmín; López-Bucio,José; Martínez-Trujillo,Miguel.
Abstract Auxin regulates a plethora of events during plant growth and development, acting in concert with other phytohormones. YUCCA genes encode flavin monooxygenases that function in tryptophan-dependent auxin biosynthesis. To understand the contribution of the YUCCA4 (YUC4) gene on auxin homeostasis, plant growth and interaction with abscisic acid (ABA) signaling, 35S::YUC4 seedlings were generated, which showed elongated hypocotyls with hyponastic leaves and changes in root system architecture that correlate with enhanced auxin responsive gene expression. Differential expression of PIN1, 2, 3 and 7 auxin transporters was detected in roots of YUC4 overexpressing seedlings compared to the wild-type: PIN1 was down-regulated whereas PIN2, PIN3 and PIN7...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arabidopsis; Auxin; Abscisic acid; YUCCA4; Root growth; Germination.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000100302

Somatic embryogenesis and plant regeneration from zygotic embryo explants of onion
Provedor de dados: 75
Autores: Sivanesan,Iyyakkannu; Kyoung,Kim E; Kyoung,Kim M; Young,Ko E; Park,Se W.
ABSTRACT: The study was undertaken to examine the effect of two synthetic auxins on somatic embryogenesis and plant regeneration from mature embryo explants of 16 onion cultivars. Cotyledons were removed from the embryos and remaining portions were cultured on MS medium supplemented with 1.0 mg/L 2,4-D and 5.0 mg/L picloram alone or in combination (1.0 mg/L 2,4-D + 2.5 mg/L picloram) to produce embryogenic callus. MS medium supplemented with 5.0 mg/L picloram was found to be the best one for both embryogenic callus induction (85%) and callus diameter (3.8 mm). Of the 16 cultivars studied, Yeoeuijuhwang exhibited the lowest frequency of embryogenic callus induction (50.5%), whereas all the other 15 cultivars showed more than 60% embryogenic callus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium cepa; Auxin; Embryogenic callus; In vitro propagation; Picloram.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000400441

New insight into how thigmomorphogenesis affects Epipremnum aureum plant development
Provedor de dados: 75
Autores: Benedetto,Adalberto Di; Galmarini,Claudio; Tognetti,Jorge.
ABSTRACT Climbing Epipremnum aureum plants develop larger leaves than unsupported, hanging plants. This effect may be regarded, in part, as a thigmomorphogenic response, but gravimorphogenetic effect may also be involved, since polar auxin transport is known to be negatively affected in plants with horizontal or hanging stems, which may result in an altered hormone balance at the whole plant level. The present work was aimed at studying how exogenous auxins and cytokinins may influence growth of E. aureum rooted cuttings under different training systems. Rooted cuttings of E. aureum were cultivated either climbing on an upright wooden board or creeping on the glasshouse bench or hanging from a basket. All leaves of each plant were sprayed to run-off at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Citokinin; Foliage plants; Gravitropism; Leaf growth; Leaf anatomy; Photosynthesis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300330

Efeito do 2,4-D + Thiabendazol e do AIB sobre o enraizamento de tocos enxertados de seringueira.
Provedor de dados: 14
Autores: PEREIRA, J. da P.; MORAES, V. H. de F.; OLIVEIRA JÚNIOR, R. C. de O.
Com base nos resultados positivos do emprego de 2,4-D associado ao Thiabendazol no enraizamento de mudas na fase "palito", superando inclusive o AIB l000 ppm, testou-se a sua utilizacao no enraizamento de tocos enxertados de seringueira e, se viavel, indica-los como sucedaneos do AIB por serem de baixo custo e mais facil aquisicao.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Porta-enxerto; Brasil; Amazonas; Rubber tree; Species; Grafting; Rootstock; Auxin; 2; 4-d.; Ácido Giberélico; Enraizamento de Estaca; Espécie; Hormônio Vegetal; Hevea; Seringueira.; Cutting.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665378

Interação entre reguladores vegetais, épocas do ano e tipos de substrato no enraizamento de estacas caulinares de Sapium glandulatum (Vell.) Pax. (pau-de-leite)
Provedor de dados: 190
Autores: Pimenta, Alex Caetano; Zuffellato-Ribas, Katia Christina; Oliveira, Brás Heleno de; Carpanezzi, Antonio Aparecido; Koehler, Henrique Soares.
O pau-de-leite (Sapium glandulatum (Vell.) Pax., Euphorbiaceae) é uma árvore nativa de vários biomas  brasileiros, com grande interesse para a recuperação  de ecossistemas degradados devido à sua rusticidade e ornitocoria intensa. Contudo, sua propagação sexuada é difícil, uma vez que a maioria das flores é masculina  e a porcentagem de germinação das sementes é muito baixa. Durante os anos de 2001 e 2002, foram realizados trabalhos de propagação vegetativa via estaquia na Embrapa Florestas (Colombo-PR), com  estacas semilenhosas de 15 cm de comprimento e  duas metades de folhas, coletadas nas quatro estações  do ano. As bases das estacas foram tratadas com 0, 6000 e 12000 mg L-1 ácido indol butírico (IBA),  sozinho ou associado com 100 mg L-1 de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estaquia; Auxina; Ácido indol butírico; Uniconazol Cutting; Auxin; Indolebutyric acid; Uniconazol.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/240

Cutting of the Berberis laurina Billb. Using Different Concentrations of Indolebutyric Acid
Provedor de dados: 190
Autores: Althaus, Michelle Melissa; Leal, Luciana Christina; Silveira, Fernanda Christina; Zuffellato-Ribas, Katia Christina; Ribas, Luciana Lopes Fortes.
Berberis laurina Billb. (Berberidaceae) is a native shrub from Floresta Ombrófila Mista ecological formation, very ornamental and useful specie for recovery of degraded areas. With medical applications, its fruit is edible and its roots are used as dye. This paper aims to analyze lhe induction of lhe rooting of Berberis laurina stem cuttings employing indolebutyric acid (IBA) in O, 1000 and 2000 mgL-1 concentrations, using the vermiculite as growing medium. In october 2003, stem cuttings were collected from eight stock plants, located in Fazenda Rio Grande - PR. Semi-hardwood cuttings were preppared with 8.0 cm long by 0.35 cm of diameter shape, containing three leaves on the top, cut in a half,  the base was cut in diagonal and the top was cut straight,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rooting; Auxin; Ornamental species; Species for recovery of degraded areas Enraizamento; Auxina; Espécie ornamental; Recuperação de áreas degradadas.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/243

2,4-D Hormesis Effect on Soybean
Provedor de dados: 87
Autores: SILVA,J.R.O.; MARQUES,J.N.R.; GODOY,C.V.C.; BATISTA,L.B.; SILVA,A.A.; RONCHI,C.P.
ABSTRACT: The hormesis effect of 2,4-D, applied at two stages of soybean development, on the physiological components of crop yield, was investigated. Soybean seeds of the cultivar ‘AG 3680 IPRO’ were sown in pots containing 7 L of a substrate and kept in a greenhouse. A randomized complete block design with four replicates was used. Eighteen treatments were tested, arranged in a split-plot scheme. The plots consisted of two stages of herbicide application (V4 and V6), and the split-plots were arranged by nine 2,4-D doses (0, 5, 10, 15, 20, 25, 30, 40, and 50 g ha-1). At the time of harvest, 100 days after sowing, significant interactions between crop development stages and 2,4-D doses were observed for the number of nodes in the main stem (NNMS) and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Auxin; Herbicide.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100154

Application of brassinosteroid to Tabebuia alba (Bignoniaceae) plants
Provedor de dados: 93
Autores: ONO,ELIZABETH ORIKA; NAKAMURA,TERUKO; MACHADO,SÍLVIA RODRIGUES; RODRIGUES,JOÃO DOMINGOS.
The objective of this study was to observe the effects of brassinosteroid, gibberelin, and auxin application on the development and foliar anatomy of Tabebuia alba (Cham.) Sandw. seedlings. T. alba seedlings were grown in plastic bags with fertilized soil and treated with the following: 1- water (control); 2- brassinolide (BR1) 0.104 mM; 3- BR1 0.208 mM; 4- 3-indoleacetic acid (IAA) 0.2854 mM; 5- IAA 0.5708 mM; 6- GA3 (gibberellin A3) 0.1443 mM; 7- GA3 0.2887 mM; 8- GA3 0.072 mM + IAA 0.1427 mM; 9- GA3 0.1443 mM + IAA 0.2854 mM; 10- GA3 0.072 mM + BR1 0.052 mM; and 11- GA3 0.1443 mM + BR1 0.104 mM. Plant height and petiole length were measured before the treatments and 21 days after application of the growth regulators. These data allowed the calculation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tabebuia alba L.; Brassinosteroids; GA3; Auxin; Growth.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312000000300002

AVOCADO SEEDLINGS MULTIPLE STEMS PRODUCTION
Provedor de dados: 94
Autores: PAIXÃO,MARCUS VINICIUS SANDOVAL; LOPES,JOSÉ CARLOS; SCHMILDT,EDILSON ROMAIS; ALEXANDRE,RODRIGO SOBREIRA; MENEGHELLI,CAROLINE MERLO.
ABSTRACT  This study aimed to evaluate the potential of multi-stems in avocado seeds according to their mass as well as the adventitious rooting of multi-stem budding with or without the use of auxin. The research was carried out at the Vegetation House of Federal Institute of Espírito Santo, Campus Santa Teresa -ES, with seeds of different masses: &lt;60 g, 61 to 80 g, 81 to 100 g and &gt;100 g, in which each experimental unit was made of five seeds, distributed within five repetitions, under a completely randomized design. The seeds were put to germinate and the percentage number of emergence and multiple stems were evaluated. After 150 days, the following evaluations were carried out: survival of rooted cuttings; number of leaves; stem diameter; root...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avocado; Seeds; Multi-stem; Rooting; Auxin; Persea americana Miller.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200901

CHANGES IN OSMOTIC AND IONIC INDICATORS IN Ananas comosus (L.) cv. MD GOLD PRE-TREATED WITH PHYTOHORMONES AND SUBMITTED TO SALINE MEDIUM
Provedor de dados: 94
Autores: MELO,YURI LIMA; DANTAS,CIBELLEY VANÚCIA SANTANA; LIMA-MELO,YUGO; MAIA,JOSEMIR MOURA; MACÊDO,CRISTIANE ELIZABETH COSTA DE.
ABSTRACT  The aim of this study was to evaluate the effect of NaCl on the hydroponic culture of cv. MD Gold pineapple pretreated with the phytohormones naphthaleneacetic acid (NAA) and 6-benzylaminopurine (BAP) using indicators of water stress and osmotic adjustment. Pineapple seedlings from saline treatments in the absence (-NB) and presence (+NB) of the phytohormones during the in vitro culture were grown in Hoagland &amp; Arnon (1950) nutrient solution in the absence and presence of different NaCl concentrations (50; 100 and 150 mM) for 10 days in a greenhouse. Plants obtained from in vitro culture pretreated with phytoregulators (+NB) showed distinct physiological responses compared to non-treated plants (-NB) in relation to dry mass (DM) in roots,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ananas comosus (L.); Auxin; Cytokinin; Osmoregulators; Salt stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200101

Effects of auxin and misting on the rooting of herbaceous and hardwood cuttings from the fig tree
Provedor de dados: 124
Autores: Sousa,Cleiton Mateus; Busquet,Rubens Nei; Vasconcellos,Marco Antônio da Silva; Miranda,Ricardo Motta.
Propagation of the fig tree predominately uses hardwood cuttings obtained from pruning stock plants. With a view to optimising fig tree propagation, the effects of auxin and misting on the rooting of herbaceous and hardwood cuttings from the fig tree were evaluated. An experiment was set up in a 2x2x2 factorial design, with two types of cuttings (softwood and hardwood), two levels of auxin (0 and 1000 mg L-1 indolbutyric acid) and two environments (with and without misting). Thirty days after starting the experiment, rooting, root length, sprouting and losses were all evaluated. The interaction of the type of cutting and the auxin was significant for rooting, sprouting, root length and cutting loss. Misting did not affect the variables analysed. In the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fig tree; Auxin; Plant propagation; Cut.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000200016

Gas exchange in Annona emarginata (Schltdl.) H. Rainer subjected to salt stress and application of plant growth regulator
Provedor de dados: 22
Autores: Dalanhol, Samanta Jaqueline; Mantoan, Luís Paulo Benetti; Amaro, Amanda Cristina Esteves; Ferreira, Gisela.
The aim of this study was to evaluate the effects of the application of plant growth regulator on gas exchange in A. emarginata seedlings subjected to different NaCl concentrations. We evaluated the gas exchange in A. emarginata seedlings subject to the presence and absence of plant growth regulator consisting of kinetin, gibberellic acid, and indolbutyric acid and three concentrations of NaCl (0 mM, 50 mM, and 100 mM). When assessing these factors individually, it was observed that in the presence of plant growth regulators, there was a reduction in stomatal conductance and transpiration, and NaCl concentration (50 mM and 100 mM) caused a reduction in CO2 assimilation, stomatal conductance, and transpiration. There was no significant interaction between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Cytokinin; Gibberellin; Photosynthesis; Sodium chloride.
Ano: 2018
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/16139

Plant proton pumps as markers of biostimulant action
Provedor de dados: 63
Autores: Zandonadi,Daniel Basílio; Santos,Mirella Pupo; Caixeta,Lisanne Santos; Marinho,Eduardo Barros; Peres,Lázaro Eustáquio Pereira; Façanha,Arnoldo Rocha.
ABSTRACT A standard protocol to evaluate the effects of biostimulants on plant physiology is still lacking. The proton pumps present in the vacuolar and plasma membranes are the primary agents responsible for the regulation of the electrochemical gradient that energizes the nutrient uptake system and acid growth mechanism of plant cells. In this study, two of these enzymes were characterized as biochemical markers of biostimulant activity. A simple and fast protocol based on the degree of root acidification using a pH sensitive dye and the Micro-Tom tomato as a plant model is proposed as an efficient methodology to prove the efficacy of biostimulants that are claimed to improve nutrient acquisition and root growth. The results agree with the data from more...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Micro-Tom; Acidification; Auxin; Rhizosphere; Bromocresol.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100024

Resposta rizogênica in vitro de ápices caulinares de mamoeiro ‘Tainung 01’ em diferentes tempos de permanência em meios de indução e regeneração - DOI: 10.4025/actasciagron.v31i4.863
Provedor de dados: 1
Autores: Schmildt, Edílson Romais; UFES; Amaral, José Augusto Teixeira do; UFES; Schmildt, Omar; UENF; Coelho, Ruimário Inácio; UFES; Rabello, Wanderson Souza; UENF; Martins Filho, Sebastião; UFV.
Este trabalho teve como objetivo avaliar a resposta rizogênica in vitro de ápices caulinares de plantas jovens de mamoeiro ‘Tainung 01’, em diferentes tempos de permanência em meios de indução e regeneração. O meio de indução empregado foi o MS, suplementado com complementos orgânicos constituídos de sacarose, mio-inositol, tiamina, piridoxina, ácido nicotínico, além de AIB. O meio de regeneração diferiu do meio de indução por ser desprovido de AIB. Os tratamentos consistiram em tempos variáveis de permanência dos explantes nos meios de indução e de regeneração (indução/regeneração): 0/25; 5/20; 10/15; 15/10; 20/5 e 25/0 dias. O delineamento experimental foi inteiramente casualisado, com seis tratamentos e quatro repetições, e cada unidade experimental foi...
Palavras-chave: 5.01.03.04-0    Produção de Mudas Carica papaya; Auxina; Micropropagação; Cultura de tecidos Carica papaya; Auxin; Micropropagation; Tissue culture.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/863

Níveis de ácido indol butírico (AIB) no enraizamento in vitro de microestacas de mamoeiro ‘Tainung 01’ - DOI: 10.4025/actasciagron.v32i1.866
Provedor de dados: 1
Autores: Schmildt, Edílson Romais; UFES; Amaral, José Augusto Teixeira do; UFES; Schmildt, Omar; UENF; Coelho, Ruimário Inácio; UFES; Rabello, Wanderson Souza; UENF; Martins Filho, Sebastião; UFV.
Este trabalho teve como objetivo avaliar níveis de AIB no enraizamento in vitro de microestacas de mamoeiro (Carica papaya L. ‘Tainung 01’). Ápices caulinares de plantas com 120 dias de idade foram estabelecidos e avaliados em meio MS, suplementado com complementos orgânicos constituídos de sacarose a 87,64 mM, mio-inositol a 555,06 µM, tiamina-HCl a 0,30 µM, piridoxina-HCl a 2,43 µM, ácido nicotínico a 4,06 µM e 0; 0,74; 1,48; 2,96 e 5,92 µM de AIB, em delineamento inteiramente casualizado, com quatro repetições e cinco tubos de ensaio por parcela. Após 30 dias, avaliou-se a percentagem de enraizamento, o crescimento das microestacas, o comprimento da maior folha e a massa de calo. Observou-se que o maior percentual estimado de enraizamento ocorreu com a...
Palavras-chave: 5.01.00.00-9    Agronomia Carica papaya; Auxina; Micropropagação; Cultura de tecidos Fitotecnia Carica papaya; Auxin; Micropropagation; Tissue culture.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/866

In vitro germination, callus induction and phenolic compounds contents from Pyrostegia venusta (Ker Gawl.) Miers
Provedor de dados: 3
Autores: Braga, Karina de Queiroz; Coimbra, Mairon César; Castro, Ana Hortência Fonsêca.
A protocol for the in vitro germination and callus induction in Pyrostegia venusta, a medicinal plant species from the Brazilian savannah (Cerrado) is provided. The establishment of cultures of P. venusta was originally obtained from seeds germinated in vitro and induced callus directly from leaf explants of seedlings. Seeds were germinated on MS and WPM media containing 100 and 50% of salt concentration, supplemented with 30 g L-1 sucrose. Callus induction consisted of the inoculation of leaf segments on MS medium plus 2,4-D or BAP in the presence or absence of light. The germination percentage averaged 85% and the aerial parts and roots of seedlings obtained in WPM with 50 and 100% of salt concentration showed elevated contents of total phenolic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.00.00.00-6; 2.03.00.00-0 seeds; Auxin; Cytokinin; Medicinal plant; Flavonoids 2.03.03.00-9.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/26067

Endophytic colonization of rice (Oryza sativa L.) by the diazotrophic bacterium Burkholderia kururiensis and its ability to enhance plant growth
Provedor de dados: 42
Autores: Mattos,Katherine A.; Pádua,Vania L.M.; Romeiro,Alexandre; Hallack,Leticia F.; Neves,Bianca C.; Ulisses,Tecia M.U.; Barros,Claudia F.; Todeschini,Adriane R.; Previato,José O.; Mendonça-Previato,Lucia.
Burkholderia kururiensis is a diazotrophic bacterium originally isolated from a polluted aquifer environment and presents a high level of similarity with the rice endophyte "B. brasilensis" species. This work assessed the ability of B. kururiensis to endophytically colonize rice plantlets by monitoring different tissues of root-inoculated plants for the presence of bacterial growth in different media, electron microscopy and by 16S rDNA analysis. Observations of roots, stems and leaves of inoculated rice plantlets by electron microscopy revealed B. kururiensis colonization predominantly on root hair zones, demonstrating endophytic colonization primarily through the endodermis, followed by spreading into xylem vessels, a possible pathway leading to aerial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Burkholderia kururiensis; Colonization; Rice; Diazotrophic bacterium; Auxin.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000300009

Agronomic performance of Marandu grass treated with plant growth biostimulants in the Amazon biome
Provedor de dados: 45
Autores: Oliveira,W.F.; Lima,E.M.; Gomes,D.I.; Alves,K.S.; Santos,P.M.; Azevedo,G.S.; Mezzomo,R.
ABSTRACT The aim was to evaluate the effect of different doses of two biostimulants on the productivity and canopy structure of Urochloa brizantha cv. Marandu grass in the establishment fase. The study was conducted in Universidade Federal Rural da Amazônia, Parauapebas, Pará, Brazil. One module of 35 plots of 25m² were established. A completely randomized experimental design was used, with seven treatments and five replicates. The treatments included a control, 0.5, 1, and 2kg/ha of biostimulant A (BIOST.A); and 0.25, 0.5, and 1L/ha of biostimulant B (BIOST.B). Three collections were performed. The data for application of the two biostimulants were analyzed separately, using the Dummy variable method and regression analysis. The application of 2kg/ha...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Cytokinin; Gibberellin; Forage stimulation; Urochloa brizantha.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000200603

Effects of plant growth promoting rhizobacteria (PGPR) on rooting and root growth of kiwifruit (Actinidia deliciosa) stem cuttings
Provedor de dados: 48
Autores: ERTURK,YASAR; ERCISLI,SEZAI; HAZNEDAR,AYHAN; CAKMAKCI,RAMAZAN.
The effects of plant growth promoting rhizobacteria (PGPR) on the rooting and root growth of semi-hardwood and hardwood kiwifruit stem cuttings were investigated. The PGPR used were Bacillus RC23, Paenibacillus polymyxa RC05, Bacillus subtilis OSU142, Bacillus RC03, Comamonas acidovorans RC41, Bacillus megaterium RC01 and Bacillus simplex RC19. All the bacteria showed indole-3-acetic acid (IAA) producing capacity. Among the PGPR used, the highest rooting ratios were obtained at 47.50% for semi-hardwood stem cuttings from Bacillus RC03 and Bacillus simplex RC19 treatments and 42.50% for hardwood stem cuttings from Bacillus RC03. As well, Comamonas acidovorans RC41 inoculations indicated higher value than control treatments. The results suggest that these...
Tipo: Journal article
Palavras-chave: PGPR; Stem cuttings; Kiwifruit; Rooting; Auxin.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000100011

Somatic embryogenesis and plant regeneration from callus cultures of Cleome rosea Vahl
Provedor de dados: 52
Autores: Simões,Claudia; Albarello,Norma; Callado,Cátia Henriques; Castro,Tatiana Carvalho de; Mansur,Elisabeth.
This paper describes a protocol for the efficient vegetative propagation of Cleome rosea by somatic embryogenesis. Leaf and stem explants from nursery-grown seedlings of C. rosea were cultivated on Murashige and Skoog (MS) medium supplemented with indole-3-acetic acid (IAA), a -naphthaleneacetic acid (NAA), 4-amino-3,5,6-trichloropicolinic acid (picloram) or 2,4-dichlorophenoxyacetic acid (2,4-D). Nodular calli were produced from both explant types in the presence of 4.5 and 9.0 µM 2,4-D. Embryo development and maturation were achieved when calli from stem explants were transferred to media containing a ten-fold reduction of 2,4-D concentration initially used (0.45 and 0.90 µM). Leaf-derived calli did not form embryos with the same treatments. The highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Embriogenic callus; Histology; Phytagel; Somatic embryos.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300024

Endophytes: exploitation as a tool in plant protection
Provedor de dados: 52
Autores: Dutta,Devanushi; Puzari,Keshab Chandra; Gogoi,Robin; Dutta,Pranab.
Endophytes are symptomless fungal or bacterial microorganisms found in almost all living plant species reported so far. They are the plant-associated microbes that form symbiotic association with their host plants by colonizing the internal tissues, which has made them valuable for agriculture as a tool in improving crop performance. Many fungal endophytes produce secondary metabolites such as auxin, gibberellin etc that helps in growth and development of the host plant. Some of these compounds are antibiotics having antifungal, antibacterial and insecticidal properties, which strongly inhibit the growth of other microorganisms, including plant pathogens. This article reviews the endophyte isolated from different plants, mode of endophytic infection and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibiotics; Auxin; Endophytism; Insecticidal; Symbiotic.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500621

Comparative study of wild and transformed salt tolerant bacterial strains on Triticum aestivum growth under salt stress
Provedor de dados: 58
Autores: Afrasayab,Shazia; Faisal,Muhammad; Hasnain,Shahida.
Eleven salt tolerant bacteria isolated from different sources (soil, plants) and their transformed strains were used to study their influence on Triticum aestivum var. Inqlab-91 growth under salt (100 mM NaCl) stress. Salt stress caused reduction in germination (19.4%), seedling growth (46%) and fresh weight (39%) in non-inoculated plants. In general, both wild and transformed strains stimulated germination, seedling growth and fresh weight in salt free and salt stressed conditions. At 100 mM NaCl, Staphylococcus xylosus ST-1 caused 25% increments in seedling length over respective control. Soluble protein content significantly enhanced (49%) under salt stress as compared to salt free control. At 100 mM NaCl parental strain PT-5 resulted about 32%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Plasmid; Rhizobacteria; Salinity; Auxin; Transformation.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400013

Synergistic response of auxin and ethylene on physiology of Jatropha curcas L.
Provedor de dados: 61
Autores: Joshi,Gargi; Shukla,Arvind; Shukla,Alok.
Jatropha curcas L. is a versatile crop since all its plant material is brought to use either as energy source, industrial or medicinal purpose. Several studies are ongoing in different parts of the world to optimize, enhance and exploit the growth, fruiting cycle and different developmental stages of the plant so that the economic yield of the plants can be utilized to the fullest limits. Foliar application of plant growth regulators such as ethrel (an ethylene releasing compound), indole acetic acid (IAA) and naphthalene acetic acid (NAA) at 50, 100 and 150 ppm, was found to influence different morpho-physiological characters in Jatropha curcas L, such as plant height, collar diameter, tree spread, flower initiation, number of inflorescence per plant,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha curcas; Auxin; Ethrel; Synergism; Morpho-physiological.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000100009

The architecture of Phaseolus vulgaris root is altered when a defense response is elicited by an oligogalacturonide
Provedor de dados: 61
Autores: Mata,Georgina Hernández; Sepúlveda,Baldemar; Richards,Alan; Soriano,Eva.
Phytoalexin accumulation is one of a myriad of plant defense responses; these responses can be elicited by pathogens or molecules such as oligogalacturonides (OGAs). Phytoalexin production has been considered a vital component of the resistance mechanisms that determine the outcome of many plant-microbe interactions. Besides inducing defense responses, OGAs have been shown to affect plant development, which normally is controlled by plant hormones, particularly auxin. In this work we measured phytoalexin accumulation in roots of bean (Phaseolus vulgaris L.) seedlings grown in the presence or absence of the auxin 3-naphtalenacetic acid (NAA) and treated with a decagalacturonide (OGA10). We found that OGA10 (0.01 mM) caused phytoalexin production and also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Phytoalexin; Phaseolus vulgaris; Root.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200012

Effects of light and ethylene on endogenous hormones and development of Catasetum fimbriatum (Orchidaceae)
Provedor de dados: 61
Autores: Suzuki,Rogério M.; Kerbauy,Gilberto B.
This study attempted to clarify the effects of dark, light and ethylene on plant growth and endogenous levels of indole-3-acetic acid (IAA), cytokinins and abscisic acid in Catasetum fimbriatum. Dark-incubation fully inhibited root and pseudobulb formation as well as leaf growth, but favored shoot elongation. The results of continuous and active growth in dark-incubated shoots (stolons) were induced by strong apical meristem sink activity and by the significantly increased levels of cytokinins in shoots. In fact, shoot length, cytokinin and IAA levels in dark-incubated shoots were about twice as great as for those grown under light conditions. Moreover, the total cytokinin level in shoots of C. fimbriatum under light conditions without ethylene was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Cytokinins; Etiolation; Plant growth; Plant hormones.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300002

Endogenous auxin and cytokinin contents associated with shoot formation in leaves of pineapple cultured in vitro
Provedor de dados: 61
Autores: Mercier,Helenice; Souza,Beatriz Maia; Kraus,Jane Elizabeth; Hamasaki,Regina Mayumi; Sotta,Bruno.
The in vitro culture of pineapple leaves on a shoot induction medium (SIM) results in the formation of protuberances and further development in shoots, and plantlets. The contents of endogenous indoleacetic acid (IAA) and five cytokinins (Cks), N6(2-isopentenyl)adenine (iP), N6(2-isopentenyl)adenosine (iPR), zeatin (Z), zeatin riboside (ZR) and N6-benzyladenine (BA), present in the basal portion of those leaves, were correlated to the organogenic response that occurs over 15 days of culture. The endogenous auxin/cytokinins ratio was lowest on the 3rd day, mainly due to a strong increase in the iP level. It seems that endogenous iP concentration triggered the induction signal for an organogenic response in pineapple leaf bases. The rise in iP content...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ananas comosus; Auxin; Bromeliaceae; Cytokinin; Hormone signalling; Plant regeneration.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200006

Reproductive physiology of mango
Provedor de dados: 61
Autores: Davenport,Thomas L.
Mango flowering involves hormonal regulation of shoot initiation and induction events resulting in reproductive shoot formation. A balance or ratio of endogenously regulated phytohormones, thought to be auxin from leaves and cytokinins from roots, appears to govern the initiation cycle independently from inductive influences. Induction of reproductive or vegetative shoots is thought to be governed by the ratio of a temperature-regulated florigenic promoter and an age regulated vegetative promoter at the time of shoot initiation. Management of off-season flowering in mango trees is being accomplished in the tropics by successfully synchronizing shoot initiation through tip pruning and use of nitrate sprays coupled with management of the stem age to induce...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Cytokinin; Flowering management; Fruiting; Hormones; Mangifera indica.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400007

In vitro rooting of Beilschmiedia berteroana, endemic to the South Central area of Chile
Provedor de dados: 118
Autores: Uribe,Matilde; Sandoval,Marian; Méndez,Amado; Mora,Freddy; Delaveau,Catherine.
Beilschmiedia berteroana ("belloto del sur") is a screrophyllous tree of the family Lauraceae that is endemic to the Central-South region of Chile. It is an endangered species; considered a second priority in the "Extinction Danger" category. This species is known for its timber, fruits and lots of mucilages, also has great potential for its size and ornamental evergreen foliage. This study had as a main objective to develop an in vitro rooting protocol of microshoots, obtained from the proliferation phase, by adding auxin: indole 3-butyric acid (IBA), naphthaleneacetic acid (NAA) and indole 3-acetic acid (IAA) in order to contribute to the recovery of the species. Results are discussed in the rooting phase, where this species is induced or maintained in...
Tipo: Journal article
Palavras-chave: Auxin; Beilschmiedia berteroana; Endangered species; Lauraceae.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100010

Vegetative rescue and ex vitro system production of Tibouchina sellowiana clonal plants by cutting and mini-cutting
Provedor de dados: 65
Autores: Fragoso,Rosimeri de Oliveira; Stuepp,Carlos André; Sá,Francielen Paola de; Kratz,Dagma; Zuffellato-Ribas,Katia Christina; Wendling,Ivar.
ABSTRACT: We aimed to evaluate the rooting potential of Tibouchina sellowiana through the experiments: I - Cuttings from current-year shoots and epicormic shoots were submitted to IBA concentrations: 0, 500, 1000, 1500 and 2000mg L-1, in a factorial arrangement 2 x 5 (two types of cuttings x five IBA concentrations), with four replicates and 20 cuttings each; II - mini-stumps of Tibouchina sellowiana were submitted to successive shoots collecting during the four seasons, in a split-plot design, with five replications of ten mini-stumps per experimental unit. From the shoots of mini-stumps, mini-cuttings were produced, which were initially kept in greenhouse and later transferred to full sun, in a 4 x 5 factorial arrangement (four seasons x five collections...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Clonal mini-garden; Ornamental species; Rejuvenation; Vegetative propagation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001100402