Antioxidant Defenses of Irrigated Forage Sorghum With Saline Aquaculture Effluent

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.

Nutritional and fermentative profile of forage sorghum irrigated with saline water

“…The decreased dry matter is related to the toxic effect of ions such as Na + and Cl − on the net carbon fixation and hence photoassimilate production (Acosta-Motos et al 2017). This decrease in the dry matter as a function of salinity level differs from values found by Guimarães et al (2018), who evaluated genotypes of irrigated forage sorghum under different leaching fractions and observed a positive linear effect, with means ranging from 41.44 to 44.62% of dry matter. Dry matter values found are similar to those recommended by McDonald et al (1991), who justifies a variation in dry matter content from 30 to 35%, as ideal for the preparation of good quality silages.…”

Production and biochemical responses of cowpea under thermal and water stress

“…•and H 2 O 2 (Guimarães et al, 2018). The plants submitted to cultivation with an increase of 4.8 °C, despite having, in general, lower values of enzymatic activity, did not show regression adjustments for the enzymes APX and CAT, as well as synchronization of the behavior with the activity of the SOD.…”

Parâmetros bioquímicos, fisiológicos e produtividade de sorgo granífero irrigado com água salina

“…A variedade IPA-1011, apresentou comportamento quadrático para estas duas enzimas, com atividades máximas da CAT e APX nas FL de 9,26 e 7,18%, respectivamente. Os resultados encontrados estão de acordo com diversos estudos encontrados na literatura (Costa et al, 2005;Guimarães et al, 2018;Guimarães et al, 2020). A cultura do sorgo é caracterizada por uma alta variabilidade genética (Igartua et al, 1995), resultando em distintos comportamentos do metabolismo fisiológico para as variedades do gênero.…”