Consulta: subjectFacets:"Gibberellins"
Registros recuperados: 12
Data/hora: 08/06/2024 17:18:37

Bactérias promotoras de crescimento do feijoeiro (Phaseolus vulgaris L.).
Provedor de dados: 14
Autores: VIEIRA, R. F.; SILVEIRA, A. P. D. da; FERRACINI, V. L.; PAZIANOTTO, R. A. A.
Resumo: O objetivo deste trabalho foi avaliar os efeitos da inoculação do feijoeiro com bactérias promotoras de crescimento de plantas. Os microrganismos foram isolados de solo próximo às raízes de feijão, em quatro tipos de solo. Um total d e 360 bactérias foi selecionado quanto à capacidade para produzir fitohormônios e de solubilizar fosfato. As bactérias selecionadas foram testadas no feijoeiro em casa de vegetação. O delineamento experimental foi inteiramente casualizado, em esquema fatorial (2 x 8), com três repetições e os tratamentos: feijão não inoculado e inoculado com as bactérias K24, K36, K71, T30, T79, A24 e T22, isoladamente. Em todos os tratamentos o feijoeiro foi cultivado na presença e ausência de fertilização fosfatada. As bactérias K36...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Bactéria promotora de crescimento; Bactéria solubilizadora de fosfato; Bactéria; Estimulante de crescimento vegetal; Ácido indolacético; Fosfato; Feijão; Phaseolus vulgaris; Growth promotion; Beans; Indole acetic acid; Phosphates; Gibberellins; Zeatin.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1028911

Chemical growth regulators on postharvest sprout development of Sechium edule Swartz
Provedor de dados: 85
Autores: Aung,Louis H; Harris,C Max; Jenner,Joel F.
Chayote is viviparous and has a tendency to sprout under postharvest storage conditions. The precocious sprout development shortens storage life, lessens fruit quality (texture) and diminishes its value for sale and consumption.Based on the hypothesis that gibberellins (GAs) are essential in initiating chayote sprout development, GAs and GA-antagonists on postharvest sprout development were determined by injection of the chemical regulators via a punched cavity in the fruit adjacent to the embryo.Exogenous application of gibberellin A1 and A3 of 1 mM promoted, while 1 mM tetcyclacis (a GA inhibitor) inhibited sprout development.Prohexadione of 1 mM also inhibited sprout emergence in semi-mature fruits and retarded the development of emergent sprout of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chayote; Gibberellins; GA-antagonists; Sprouting.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100019

Exogenous application of phytohormones mitigates the effect of salt stress on Carica papaya plants
Provedor de dados: 91
Autores: Sá,Francisco V. da S.; Brito,Marcos E. B.; Silva,Luderlândio de A.; Moreira,Rômulo C. L.; Paiva,Emanoela P. de; Souto,Lauter S.
ABSTRACT The salinity has complex effects on the physiological, nutritional and hormonal interactions of plants. This study aimed to evaluate the mitigating action of exogenous application of different types and concentrations of phytohormones on Carica papaya under salt stress. The experiment was conducted in greenhouse, using a randomized block design with treatments formed from a 2 x 3 x 5 factorial scheme, relative to two concentrations of salts in the irrigation water (0.6 and 2.4 dS m-1), three types of phytohormones [Auxin = indole-3-acetic acid; Cytokinin = CPPU (N-(2-chloro-pyridyl)-N-phenylurea) and Gibberellin = gibberellic acid(AG3)], and five concentrations of the phytohormone (0, 12.5, 25.0, 37.5 and 50.0 µM L-1), with three repetitions,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxins; Cytokinins; Gibberellins; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000300170

Changes in hormonal balance as key to reserve degradation after dormancy overcoming in Annona macroprophyllata and Annona purpurea seeds
Provedor de dados: 94
Autores: Ferreira,Gisela; De-la-Cruz-Chacón,Ivan; González-Esquinca,Alma Rosa.
Abstract  Studies on the effect of the applying of phytoregulators to overcome seed dormancy have been carried out in Annonaceae species, thus the endogenous relationship between abscisic acid and gibberellins after the application of phytoregulators needs to be known in these species. Considering the importance of hormonal balance in dormancy mechanisms, the aim of this research was to elucidate how endogenous ABA and GA concentrations change after the application of phytoregulators in seeds and how these changes affect reserve degradation during germination of Annona macroprophyllata and A. purpurea seeds. Seeds were submitted to three conditions: - no soaking, soaking-in-water and soaking-in-GA4+7+benzyladenine. ABA, GA, lipids, proteins, and total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abscisic acid; Gibberellins; Germination; Lipids; Proteins; Soluble sugars; Plant growth regulators; Phytoregulators.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000602002

Influência do ácido giberélico sobre a arquitetura de plantas de feijão no início de desenvolvimento - DOI: 10.4025/actasciagron.v32i2.3721
Provedor de dados: 1
Autores: Souza, Clovis Arruda; UDESC; Coelho, Cileide Maria Medeiros; UDESC; Guidolin, Altamir Frederico; UDESC; Engelsing, Marcio José; UDESC; Bordin, Luiz Carlos; UDESC.
A baixa altura de inserção de vagem em feijão é pela baixa estatura dos entrenós basais da planta, que acarreta em problemas de manejo das plantas, qualidade de grãos e ineficiência na colheita com automotriz. Assim, o objetivo deste trabalho foi determinar o efeito de giberelina exógena para incrementar estatura dos entrenós basais das plantas. O experimento foi conduzido em casa-de-vegetação e a campo, com dois genótipos de feijão. Em ambas as condições realizaram-se os seguintes tratamentos: sementes tratadas com solução de ácido giberélico (GA3) 10 &amp;micro;M; pulverização sobre as plântulas (gancho, folhas primárias, primeiro e segundo trifólios) com o GA3; e água destilada (controle). As plantas foram colhidas e avaliadas no estádio de...
Palavras-chave: 5.01.03.00-8 Phaseolus vulgaris; Giberelinas; Alongamento da haste; Hipocótilo; Epicótilo Fitotecnia; Fisiologia de plantas cultivadas Phaseolus vulgaris; Gibberellins; Stem elongation; Hypocotyl; Epicotyl.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3721

Germination and biochemical changes in ‘Formosa’ papaya seeds treated with plant hormones
Provedor de dados: 1
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

Effect of storage in overcoming seed dormancy ofAnnona coriacea Mart. seeds
Provedor de dados: 42
Autores: DRESCH,DAIANE M.; SCALON,SILVANA P.Q.; MASETTO,TATHIANA E.
The aim of this study was to evaluate the effect of pre-treatments on overcoming dormancy of A. coriacea seeds. Seeds were processed and stored in polyethylene bags at temperatures of at -18°C (42% RH), 5°C (34% RH), 15°C (60% RH) and 25°C (34% RH), during 0, 30, 60, 90, 120 and 150 days. After storage, seeds were immersed in 350 mg.L−1 gibberellic acid for 144 hours. Sowing was carried out in plastic bags containing Red Latosol + Bioplant®. Moisture content, emergence percentage, emergence speed index, length and dry mass of seedlings, were evaluated. The experimental design was completely randomized in a factorial with four replications of 50 seeds each. The seed storage at 5°C and subsequent immersion in gibberellic acid was efficient to reach high...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annonaceae; Gibberellins; Brazilian Savanna; Temperatures.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000402077

Supraoptimal ethylene acts antagonistically with exogenous gibberellins during Solanum lycopersicum (Solanaceae) hypocotyl growth
Provedor de dados: 51
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

Effects of Storage and Exogenous Ga3 on Lychee Seed Germination
Provedor de dados: 52
Autores: Ono,Elizabeth Orika; Leonel,Sarita; Duarte Filho,Jayme; Rodrigues,João Domingos.
The effects of storage time and exogenous gibberellic acid on lychee seeds germination were studied. The seeds were removed from ripe fruits, washed, dried, stored at 8°C for 0, 15 and 30 days, and soaked during 24 hours in water and GA3 at 50, 100 and 200 mg.L-1 solutions. As the storage period increased, the germination capacity was lost, and the seeds had a short germinability after 30-day storage period. Gibberellic acid had not significant effect on enhancing both the germination percentage and rate.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gibberellic acid; Gibberellins; Deterioration; Viability; Recalcitrant seed.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400015

Application of plant growth regulators at pre-harvest for fruit development of 'PÊRA' oranges
Provedor de dados: 52
Autores: Almeida,Isolina Maria Leite de; Rodrigues,João Domingos; Ono,Elizabeth Orika.
The aim of the present work was to evaluate the effects of auxins and gibberellins when applied at pre-harvest to the fruit development, and to the ripening and natural fall of the fruit, in 'Pêra' oranges. Trees of Citrus sinensis Osbeck cv. Pêra, 5 years old, were utilized. The treatments applied were: GA3 + 2,4-D 12.5mg L-1 of each; GA3 + 2,4-D 25mg L-1 ; GA3 + 2,4-D 37.5mg L-1; GA3 + NAA 12.5mg L-1; GA3 + NAA 25mg L-1; GA3 + NAA 37.5mg L-1; NAA + 2,4-D 12.5mg L-1; NAA + 2,4-D 25mg L-1; NAA + 2,4-D 37.5mg L-1; and water (control). The treatments were applied 3 times, at intervals of 45 days. The variables evaluated were: rate of natural fall (%), fruit length and diameter (mm), and fresh fruit weight (g). None of the treatments promoved alterations in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxins; Gibberellins; Fruit drop; Development.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400003

Desiccation tolerance in seeds of Annona emarginata (Schldtl.) H. Rainer and action of plant growth regulators on germination
Provedor de dados: 61
Autores: Corsato,Jaqueline Malagutti; Ferreira,Gisela; Barbedo,Claudio Jose.
Annona emarginata (Schldtl.) H. Rainer ("araticum-de-terra-fria") is used as a rootstock for several species of Annonaceae. It is suggested that these seeds should be sown immediately after extraction and, therefore, they could be intolerant to desiccation. There are several mechanisms involved with desiccation tolerance. Soluble sugars, for example, can accumulate and act as osmoprotectants for the membrane system during desiccation. The aim of this study is to assess desiccation tolerance in A. emarginata seeds. In addition, we examined the soluble sugars involved in desiccation tolerance. Finally, we determined the effect of gibberellic acid (GA4+7) and N-(phenylmethyl)-aminopurine in promoting the germination of seeds with different water contents. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araticum-de-terra-fria; Desiccation; Cytokinins; Gibberellins; Soluble sugars.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000400004

Growth regulators and essential oil production
Provedor de dados: 61
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