Brassinolide
Mostrando 1-12 de 51 artigos, teses e dissertações.
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1. Influência de Estímulo ao Crescimento de Extratos Aquosos de Brassica sob Aplicação Foliar sobre os Atributos Morfológicos e de Rendimento de Trigo Panificável sob Regimes Diferentes de Fertilização
RESUMO: Este estudo foi realizado para investigar o efeito estimulador do extrato aquoso de plantas do gênero Brassica, sob aplicação foliar, no crescimento e na produtividade do trigo panificável (cv. Punjab 2011) em doses baixa e alta de fertilizantes. O extrato aquoso de Brassica (5%) e o regulador de crescimento benzilaminopurina (BAP) (5 ppm) foram
Planta daninha. Publicado em: 29/10/2018
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2. Análise funcional dos peptídeos RALF em Arabidopsis: avaliação do efeito do hormônio brassinolide em plantas superexpressoras e silenciadas para os genes AtRALF1 e AtRALF34 / Functional analysis of RALF peptides in Arabidopsis: evaluation of the hormone brassinolide effect in plants overexpressing and silenced for both AtRALF1 e AtRALF34 genes
A exemplo do que ocorre em animais, peptídeos hormonais em plantas desempenham papéis importantes no crescimento, desenvolvimento e defesa. RALF é um peptídeo hormonal ubíquo em plantas que foi primeiramente isolado de folhas de tabaco. Embora não se saiba exatamente sua função, as informações até agora existentes apontam para um envolvimento com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012
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3. Fruit set and growth of murcott mandarin hybrid (citrus reticulata blanco x citrus sinensis l. osbeck) and tahiti lime (citrus latifolia tanaka) with use of bioregulators. / Fixação e desenvolvimento dos frutos do tangor Murcote (Citrus reticulata Blanco x Citrus sinensis L. Osbeck) e da lima ácida Tahiti (Citrus latifolia Tanaka) com a utilização de biorreguladores.
A alternância de produção, o pequeno tamanho e a baixa capacidade de fixação dos frutos são alguns problemas encontrados em alguns cultivares cítricos. O presente trabalho foi conduzido em 2000/2001 sob condições de campo, em pomares comerciais de tangor Murcote (Citrus reticulata Blanco x Citrus sinensis L. Osbeck) e de lima ácida Tahiti (Citrus l
Publicado em: 2002
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4. Aplicação de brassinoesteróide em plantas de ipê (Tabebuia alba)
O objetivo deste estudo foi de se verificar o efeito da aplicação de brassinoesteróide, giberelina e auxina no desenvolvimento e anatomia foliar de plantulas jovens de Tabebuia alba (Cham.) Sandw. Para tanto, utilizaram-se plântulas de ipê de 104 dias cultivadas em saco plástico com capacidade para 1 litro contendo solo adubado. Os tratamentos aplicado
Revista Brasileira de Fisiologia Vegetal. Publicado em: 2000
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5. Blockage of Brassinosteroid Biosynthesis and Sensitivity Causes Dwarfism in Garden Pea.
Endogenous brassinosteroids (BRs) in the dwarf mutants lka and lkb of garden pea (Pisum sativum L.) and comparable wild-type plants were quantified by gas chromatography-selected ion monitoring using deuterated internal standards. In young shoots of the lkb mutant, the levels of brassinolide, castasterone, and 6-deoxocastasterone were 23-, 22-, and 9-fold lo
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6. Characterization of Brassinazole, a Triazole-Type Brassinosteroid Biosynthesis Inhibitor1
Screening for brassinosteroid (BR) biosynthesis inhibitors was performed to find chemicals that induce dwarfism in Arabidopsis, mutants that resembled BR biosynthesis mutants that can be rescued by BR. Through this screening experiment, the compound brassinazole was selected as the most potent chemical. In dark-grown Arabidopsis, brassinazole-induced morphol
American Society of Plant Physiologists.
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7. The Arabidopsis deetiolated2 mutant is blocked early in brassinosteroid biosynthesis.
The Arabidopsis DEETIOLATED2 (DET2) gene has been cloned and shown to encode a protein that shares significant sequence identity with mammalian steroid 5 alpha-reductases. Loss of DET2 function causes many defects in Arabidopsis development that can be rescued by the application of brassinolide; therefore, we propose that DET2 encodes a reductase that acts a
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8. A Putative Role for the Tomato Genes DUMPY and CURL-3 in Brassinosteroid Biosynthesis and Response1
The dumpy (dpy) mutant of tomato (Lycopersicon esculentum Mill.) exhibits short stature, reduced axillary branching, and altered leaf morphology. Application of brassinolide and castasterone rescued the dpy phenotype, as did C-23-hydroxylated, 6-deoxo intermediates of brassinolide biosynthesis. The brassinolide precursors campesterol, campestanol, and 6-deox
American Society of Plant Physiologists.
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9. Investigations on the Mechanism of the Brassinosteroid Response: VI. Effect of Brassinolide on Gravitropism of Bean Hypocotyls
Brassinosteroids are steroidal lactones of plant origin that promote growth of a number of plant systems, and particularly the growth induced by auxins. Biologically active brassinosteroids (BR) also promote the growth of gravisensitive hypocotyls of 7-day-old light grown Phaseolus vulgaris when gravistimulated. Brassinolide-mediated promotion of curvature o
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10. The Arabidopsis DIMINUTO/DWARF1 gene encodes a protein involved in steroid synthesis.
We have identified the function of the Arabidopsis DIMINUTO/DWARF1 (DIM/DWF1) gene by analyzing the dim mutant, a severe dwarf with greatly reduced fertility. Both the mutant phenotype and gene expression could be rescued by the addition of exogenous brassinolide. Analysis of endogenous sterols demonstrated that dim accumulates 24-methylenecholesterol but is
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11. Arabidopsis CYP85A2, a Cytochrome P450, Mediates the Baeyer-Villiger Oxidation of Castasterone to Brassinolide in Brassinosteroid Biosynthesis
The conversion of castasterone (CS) to brassinolide (BL), a Baeyer-Villiger oxidation, represents the final and rate-limiting step in the biosynthesis of BL in plants. Heterologously expressed Arabidopsis thaliana CYP85A2 in yeast mediated the conversion of CS to BL as well as the C-6 oxidation of brassinosteroids (BRs). This indicated that CYP85A2 is a bifu
American Society of Plant Biologists.
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12. A Rice Brassinosteroid-Deficient Mutant, ebisu dwarf (d2), Is Caused by a Loss of Function of a New Member of Cytochrome P450
We characterized a rice dwarf mutant, ebisu dwarf (d2). It showed the pleiotropic abnormal phenotype similar to that of the rice brassinosteroid (BR)-insensitive mutant, d61. The dwarf phenotype of d2 was rescued by exogenous brassinolide treatment. The accumulation profile of BR intermediates in the d2 mutants confirmed that these plants are deficient in la
American Society of Plant Biologists.