DEFESAS ANTIOXIDATIVAS DO SORGO FORRAGEIRO SOBRE O CULTIVO IRRIGADO COM EFLUENTE SALINO DE PISCICULTURA

Miguel Julio Machado Guimarães; Welson Lima Simões; Terezinha de Jesus Rangel Camara; Cláudia Ulisses de Carvalho Silva; Lilia Gomes Willadino

doi:10.1590/1983-21252018v31n116rc

Authors

Miguel Julio Machado Guimarães Agricultural Engineering Department, Universidade Federal Rural de Pernambuco, Recife, PE
Welson Lima Simões Embrapa Semiárido, Petrolina, PE
Terezinha de Jesus Rangel Camara Biology Department, Universidade Federal Rural de Pernambuco, Recife, PE
Cláudia Ulisses de Carvalho Silva Biology Department, Universidade Federal Rural de Pernambuco, Recife, PE
Lilia Gomes Willadino Biology Department, Universidade Federal Rural de Pernambuco, Recife, PE

DOI:

https://doi.org/10.1590/1983-21252018v31n116rc

Keywords:

Enzymes. Oxidative stress. Sorghum bicolor (L.). Moench.

Abstract

The objective of this work was to evaluate the biomass production and antioxidant enzymatic system activity of irrigated forage sorghum with saline aquaculture effluent under different leaching fractions. The experiment was conducted in the Caatinga Experimental Field of the Embrapa Semiarido, in Petrolina, State of Pernambuco, Brazil. The experimental design was a complete randomized block in a split-plot arrangement with four replications, consisting of three forage sorghum varieties (Volumax, F305 and Sudan) and four leaching fractions (0, 5, 10 and 15%). The vegetal materials were collected when the plants were at the soft-dough stage. The biomass production and activity of the enzymes superoxide dismutase, catalase and ascorbate peroxidase were evaluated. Irrigation with saline aquaculture effluent with leaching fraction of 15% results in low salinity level in the root zone and higher biomass production of forage sorghum Sudan and F305, in semiarid conditions. The antioxidant system was activated in the three sorghum varieties to prevent accumulation of reactive oxygen species, with the synchrony between the enzymes superoxide dismutase and catalase resulting in a better productive response of the varieties Sudan and F305.

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Author Biography

Miguel Julio Machado Guimarães, Agricultural Engineering Department, Universidade Federal Rural de Pernambuco, Recife, PE

Engenheiro Agrônomo formado pela Universidade Federal do Recôncavo da Bahia, Mestre em Engenharia Agrícola pela Universidade Federal Rural de Pernambuco (UFRPE). Atualmente é estudante de Doutoramento da UFRPE no Programa de Pós-Graduação em Engenharia Agrícola, atuando na linha de pesquisa Manejo Integrado de Água e Solo. Tendo como principais temas de estudo o Manejo da Irrigação e a Salinidade na Agricultura, desenvolve trabalhos em sistemas irrigados em fruteiras, hortaliças e forrageiras; e ainda o efeito dos sais na produção agrícola e o efeito deste estresse abiótico na fisiologia das plantas. Em paralelo, desenvolve trabalhos relacionando a irrigação com as características morfológicas das culturas, tendo como foco de estudo as culturas da bananeira, mandioca, beterraba, sorgo e citros.

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