Jasmonic acid participation in the shade tomato responses by weeds

• Grant number: 16/21042-1
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: July 01, 2017
• End date: December 31, 2018
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Pedro Luis da Costa Aguiar Alves
• Grantee: Izabela Orzari
• Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Plants emit signals to activate defense responses to stress caused by low solar radiation (shading), which may be caused by the presence of other plants. As jasmonic acid hormone (JA) participates in the protection of plants and is regulated by phytochrome, radiation receivers, it is likely to collaborate to overcome shadowing. The general aim of this study is to evaluate the participation of JA in tomato responses (Solanum lycopersicum L.) to shading. In the first step, the hybrid Heinz 9553 is cultivated under artificial environment without shading and covering, and is applied methyl jasmonate (MeJA - 0, 0.15, 0.25 and 0.50 mM) and ibuprofen (IBU - 0: 1 25, 2.5 and 5.0 mM) at 7, 14, 21 and 28 days after transplanting of plants. Growth analysis (dry weight and length of root and shoot, diameter and leaf area), biochemical (chlorophylls, carotenoids and anthocyanins) and gas exchange analysis will be carried out. With the control plants will be analyzed JA and protein zim-domain jasmonate (JAZ). The second step will be to carry out the same procedures with MeJA and IBU products in cultivar Micro-Tom and his mutant insensitive to JA (jai1). The third step is to maintain the H9553 tomato under shade promoted by weed Amaranthus viridis L. (pigweed-the-spot). Competition under different densities of A. viridis will be studied and applied MeJA in tomato in the best concentration and application time observed in other experiments.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

ORZARI, Izabela. Participação de ácido jasmônico nas respostas do tomateiro ao sombreamento por plantas daninhas. 2018. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal Jaboticabal.