RESISTANCE OF IRRIGATED RICE GENOTYPES TO BROWN SPOT AND PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES IN PLANTS TO Bipolaris oryzae

Authors

DOI:

https://doi.org/10.20873/2024_v3_25

Abstract

Rice is the staple food for around 2.4 billion people, playing an important economic and social role. Although Tocantins stands out as the third largest producer, it has the potential to increase productivity, as long as there is effective disease control. Among the main ones, Brown Spot stands out, due to the fungus Bipolaris oryzae also causing grain spot. Few studies have related the resistance of rice cultivars to the biochemical mechanisms of response to infections. Thus, the present work aimed to evaluate the resistance of irrigated rice genotypes to brown spot and physiological and biochemical responses of plants. The results obtained in the field through the Area Below the Disease Progress Curve (AACPD) and in a controlled environment, through enzymatic activities, demonstrated variation in resistance to Brown Spot. Regarding the enzymes measured, there were differences between the plants inoculated with B. oryzae and the control treatment, without inoculation. For the enzyme Phenol Peroxidase (POX) it was found that there was no enzymatic response in relation to B. oryzae infection. On the other hand, for Quit, there was a higher enzyme activity in infected plants when compared to uninfected plants.

Published

2024-03-30

How to Cite

Almeida Oliveira, J. V. de, de Sena Fernandes, P. R., Dias, B. L., de Souza Carlos Mourão, D., Gomes de Barros, M. R., Ribeiro Lima, L., … Rodrigues dos Santos, G. (2024). RESISTANCE OF IRRIGATED RICE GENOTYPES TO BROWN SPOT AND PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES IN PLANTS TO Bipolaris oryzae. DESAFIOS - Revista Interdisciplinar Da Universidade Federal Do Tocantins, 11(3). https://doi.org/10.20873/2024_v3_25