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Physiological and biochemical responses involved in metabolism of nitrogen and sugars in sugarcane varieties fertilized with selenium

Grant number: 20/06461-3
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): March 01, 2021
Effective date (End): November 30, 2021
Field of knowledge:Agronomical Sciences - Agronomy
Principal Investigator:André Rodrigues dos Reis
Grantee:Maycon Anderson de Araujo
Host Institution: Faculdade de Ciências e Engenharia. Universidade Estadual Paulista (UNESP). Campus de Tupã. Tupã , SP, Brazil

Abstract

Selenium (Se) is essential for humans and animals and is considered a beneficial element for plants when applied in low concentrations. There is conclusive evidence about the deficiency of Se in soils in Brazil and consequently in agricultural and human products. Little is known about the effect of Se on the metabolism of nitrogen (N) and sugars. Recent work has shown that there is a close relationship between the metabolism of N and Se because they are part of active sites of amino acids and proteins. The present work has the hypothesis that Se can increase the efficiency of the use of N in sugarcane by activating the enzyme nitrate reductase, increasing chlorophyll, photosynthesis and, finally, greater sucrose deposit in different organs of the plant. The objective of this work is to evaluate Se doses in the metabolism of N and sugars by determining key enzymes such as nitrate reductase, invertase and sucrose synthase. To evaluate sucrose accumulation in different organs of the plant, primary compounds will be quantified, as well as the confirmation of the deposit of sugars through histological cuts to reveal starch. It is expected that Se increases the concentration of sucrose in sugarcane varieties by activating the primary metabolism, which may represent a greater amount of sucrose per hectare. There is still no recommendation to apply Se to sugarcane under Brazilian conditions. This study is of fundamental importance to establish Se doses based on plant physiology for possible future Se recommendations under field conditions for sugarcane. (AU)

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Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
ARAUJO, Maycon Anderson de. Morphophysiological and biochemical responses involved in nitrogen and sugar metabolism in sugarcane varieties fertilized with selenium. 2022. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Ilha Solteira Ilha Solteira.

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