Abstract
ABSTRACT: The objective of this research was to evaluate the response of wheat plants to the application of possible elicitor compounds against Bipolaris sorokiniana pathogen. This response was measured through the quantification of antioxidant enzymes, malondialdehyde and flavonoids, evaluation of the severity of brown spot disease and productivity in wheat, greenhouse and field crops. The treatments consisted of suspensions of endophytic fungi Aspergillus japonicus and Trichoderma tomentosum, salicylic acid, acibenzolar-S-methyl and fungicide. In the field trials, in 2015 and 2016, the development of the disease was lower and productivity was higher in all treatments, with emphasis on the fungicide. However, endophytic fungi suspensions demonstrated potential as growth promoters, disease severity reducers and protective antioxidant response activators, as they promoted significant increase in superoxide dismutase, catalase, glutathione and flavonoid enzymes.
Highlights
IntroductionDue to the high demand observed, domestic production of this grain is not sufficient to supply the domestic market
Wheat consumption in Brazil exceeds 10 million tons/year
It is noted that treatments 1 and 2, with the suspensions of A. japonicus and T. tomentosum, respectively, showed potential as growth promoters, once the yield was higher than the control values
Summary
Due to the high demand observed, domestic production of this grain is not sufficient to supply the domestic market. There is the need to import part of the wheat consumed (EMBRAPA, 2004). This lower production than the market demand is due to several factors, such as the reduction of cultivated areas and the climate with hot and humid winters, which favor the development of fungal diseases (IFTIKHAR et al, 2012). Among the pathogens that infect this culture can be cited Bipolaris sorokiniana Due to the great morphological, physiological and genetic variability of this pathogen, the adoption of adequate measures for control becomes difficult
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