Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/10549
Título: Influência do jasmonato de metila e do tween 20 na fisiologia e na severidade da ferrugem asiática na soja
Autores: Alvarenga, Amauri Alves de
Campo, Clara Beatriz Hoffmann
Alvarenga, Amauri Alves de
Alves, Eduardo
Paula, Ana Cardoso Clemente Filha Ferreira de
Palavras-chave: Glycine max
Jasmonato
Indução de resistência
Jasmonate
Resistance induction
Data do documento: 29-Out-2015
Editor: Universidade Federal de Lavras
Citação: OLIVEIRA, T. B. de. Influência do jasmonato de metila e do tween 20 na fisiologia e na severidade da ferrugem asiática na soja. 2014. 90 p. Dissertação (Mestrado em Agronomia)-Universidade Federal de Lavras, Lavras, 2014.
Resumo: The Asian soybean rust, caused by the Phakopsora pachyrhizi fungus, is a destructive foliar disease in almost all soy producing countries. In the attempt of mellowing the impacts caused by this disease, this study aimed at evaluating the effect of methyl jasmonate on the induction of resistance to Asian soybean rust through the severity of the disease and the temporal analysis of the chitinase and β-1,3-glucanase enzymes’ activities, as well as the qualitative and quantitative profiles of the phenolic compounds and gas exchange involved. Soy plants of the BRS 361 cultivar, in the V 5 stage, were sprayed with water, 0.02% Tween 20 and methyl jasmonate 1.25 mM in greenhouse. Twenty four hours after spraying, the plants were inoculated with 1.4x10 5 uredospores/mL of Phakopsora pachyrhizi, applying water to the witness plants. With the results obtained we may verify that the methyl jasmonate and Tween 20 were effective in promoting the reduction of disease severity. The application of methyl jasmonate increased the activity of chitinase and β-1,3-glucanase in leaves submitted or not to inoculation, regardless of the evaluation period. The compounds daidzein, daidzin, malonyl daidzin and coumestrol were produced only by plants sprayed with water (false-inoculated). Tween 20 and methyl jasmonate induced the accumulation of these phenolic compounds even in the plants not inoculated. The application of these products also promoted accumulation of other phenolic compounds. The inoculation promoted photosynthetic efficiency reduction expressed by the reduction of ecophysiological characteristics. The application of methyl jasmonate Tween 20 intensified the negative effect of inoculation in stomatal conductance and in transpiration, however, without altering photosynthesis. We conclude that methyl jasmonate and Tween 20 may be considered as Asian soybean rust resistance inducing compounds.
URI: http://repositorio.ufla.br/jspui/handle/1/10549
Aparece nas coleções:Agronomia/Fisiologia Vegetal - Mestrado (Dissertações)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
DISSERTAÇÃO_Influência do jasmonato de metila e do tween 20 na fisiologia e.pdf1,74 MBAdobe PDFVisualizar/Abrir


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.