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Defense responses of wheat plants (Triticum aestivum L.) against brown spot as a result of possible elicitors application

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 severi...

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Published in:Arquivos do Instituto Biológico (São Paulo) 2019, Vol.86
Main Authors: Pittner, Elaine, Marek, Janaina, Bortuli, Douglas, Santos, Leandro Alvarenga, Knob, Adriana, Faria, Cacilda Marcia Duarte Rios
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container_title Arquivos do Instituto Biológico (São Paulo)
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Marek, Janaina
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Santos, Leandro Alvarenga
Knob, Adriana
Faria, Cacilda Marcia Duarte Rios
description 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. RESUMO: O objetivo desta pesquisa foi avaliar a resposta de plantas de trigo diante da aplicação de possíveis compostos elicitores perante o patógeno Bipolaris sorokiniana. Tal resposta foi examinada por meio da quantificação de enzimas antioxidantes, malondialdeído e flavonoides, da análise da severidade da doença mancha marrom e da produtividade na cultura do trigo, em casa de vegetação e em campo. Os tratamentos consistiram em suspensões de fungos endofíticos Aspergillus japonicus e Trichoderma tomentosum, ácido salicílico, acibenzolar-S-metil e fungicida. Nos ensaios em campo, em 2015 e 2016, o desenvolvimento da doença foi menor e a produtividade foi superior em todos os tratamentos, com destaque para o fungicida. No entanto, as suspensões de fungos endofíticos demonstraram potencial como promotores de crescimento, redutores da severidade da doença e ativadores de resposta antioxidante protetora, pois promoveram o aumento significativo das enzimas superóxido dismutase e catalase, das glutationas e flavonoides.
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subjects ascorbato
Bipolaris sorokiniana
catalase
flavonoides
glutationa
title Defense responses of wheat plants (Triticum aestivum L.) against brown spot as a result of possible elicitors application
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