The action of histamine on maize seeds [Zea mays L.] under high temperatures

• Grant number: 21/08125-3
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): September 01, 2021
• Effective date (End): August 31, 2022
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal researcher: Adriana Lima Moro
• Grantee: Gabriel Cesar Monteiro
• Home Institution: Faculdade de Ciências Agrárias. Universidade do Oeste Paulista (UNOESTE). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

Corn [Zea mays L.] is a cereal cultivated worldwide that has great economic importance. Due to the substantial increase in global temperature, this crop is directly affected in its productive potential and in its morphological and physiological structures. However, an application of a biomolecule such as a histamine is able to act to mitigate the effects of stress. Histamine acts on germination, reproduction, growth, development, and also on cell metabolism processes, protecting against the effects of heat stress. The aim of this work is to evaluate the effects of exogenous Histamine application in corn seeds under to high temperatures. It will be tested the hypothesis that the exogenous application of Histamine in corn seeds may have a mitigating effect when subjected to high temperatures. The study will be the application of Histamine doses in corn seeds under to temperature increase, with an emphasis on mitigating the deleterious effects of stress. Therefore, tests will be performed on germination percentage, root and shoot lengths, fresh mass, dry mass, root morphological analysis, leaf anatomical analysis, and analysis of the activity of antioxidant enzymes superoxide dismutase, catalase, and peroxidase (SOD, CAT, and POD). The results will be evaluated from analysis of variance (ANOVA, p<0.05) and means compared by the Tukey test (p<0,05). (AU)