Is the hydrogen peroxide involved in long-distance signaling responsible for activating water deficit acclimatization mechanisms?

• Grant number: 19/20339-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2020
• End date: June 30, 2021
• Field of knowledge: Agronomical Sciences - Agronomy
• Principal Investigator: Lucas Aparecido Gaion
• Grantee: Aline Dell Passo Reis
• Host Institution: Faculdade de Ciências Agrárias (FCA). Universidade de Marília (UNIMAR). Marília , SP, Brazil

Abstract

Plants are sessile organisms that must perceive and respond to various environmental stimuli throughout their life cycle. Among these stimuli, drought stress has become the main limiting factor for agricultural production worldwide. The water deficit is initially perceived by the roots, which should efficiently signal the aerial part and thus trigger the mechanisms of acclimatization to drought. Therefore, in order to evaluate the role of hydrogen peroxide (H2O2) in root-shoot communication during water deficit, tomato (Solanum lycopersicum L.) cultivar Micro-Tom (MT) will be treated exogenously. with H2O2 and catalase (CAT - enzyme responsible for converting H2O2 into H2O and O2), and cultivated under irrigated and water deficit conditions. Plants will be grown in pots with a capacity of 500 mL in a split root scheme, in turn, the chemical treatments, H2O2 and CAT, will be applied together with water on the last day before the imposition of water deficit. In turn, the water deficit will be induced by the suspension of irrigation. Subsequently, growth, electrolyte leakage and water relations will be evaluated. In addition, a second trial using detached leaves will be performed to assess leaf water loss in response to H2O2 and CAT treatment. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

A. D. P. REIS; R. F. CARVALHO; I. B. COSTA; R. J. S. GIRIO; R. GUALBERTO; R. C. SPERS; L. A. GAION. O peróxido de hidrogênio está envolvido na sinalização de longa distância do déficit hídrico controlando o fechamento estomático precoce em plantas de tomate. Brazilian Journal of Biology, v. 82, 2022-11-14. (19/20339-9)