Data/hora: 09/06/2024 04:18:30

Provedor de dados: | Brazilian Journal of Microbiology
País: | Brazil
Título: | Control of brown spot pathogen of rice (Bipolaris oryzae) using some phenolic antioxidants
Autores: | Shabana,Y.M.; Abdel-Fattah,G.M.; Ismail,A.E.; Rashad,Y.M.
Data: | 2008-09-01
Ano: | 2008
Palavras-chave: | Benzoic acid; Bipolaris oryzae; Hydroquinone; Salicylic acid; Systemic resistance.
Resumo: | Bipolaris oryzae is the causal agent of rice brown spot disease and is responsible for significant economic losses. In order to control this disease, three phenolic antioxidants were tested (salicylic acid, benzoic acid and hydroquinone). The antifungal activity of the tested substances were investigated against B. oryzae at different concentrations in vitro, as well as the efficacy of their exogenous application in controlling rice brown spot disease under field conditions. In vitro, benzoic acid or salicylic acid at 9 mM completely inhibited the growth of B. oryzae. Under field conditions, spraying of benzoic acid at 20 mM led to a significant reduction in disease severity (DS) and disease incidence (DI) on the plant leaves, in addition to a significant increase in the grain yield and its components. Some biochemical responses were also detected, where the application of the previous treatment led to a significant increase in the total photosynthetic pigments (chlorophyll a and b and carotenoids) in rice leaves and in the total carbohydrate and protein contents of the yielded grains.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300006
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822008000300006
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.39 n.3 2008
Fonte: | info:eu-repo/semantics/openAccess