How does blue light modulate seed germination in tomato?

• Grant number: 18/20748-3
• Support Opportunities: Regular Research Grants
• Start date: December 01, 2019
• End date: November 30, 2021
• Field of knowledge: Biological Sciences - Botany - Pant Physiology
• Principal Investigator: Rogério Falleiros Carvalho
• Grantee: Rogério Falleiros Carvalho
• Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Although it has long been known that light controls seed germination of a wide range of species, the role of the blue light (BL) wavelengths still needs much to be explored. Many works show that BL induces or inhibits the seed germination, but through different irradiances. Since BL acts by means of photoreceptors, different responses during seed germination raises questions about how these molecules control seed germination dependent on the quality of the BL. For example, cryptochromes strongly modulate seed germination through interaction with abscisic acid and gibberellins, which classically inhibit and induce, respectively, seed germination. Nowadays, it has been shown, especially in barley grain, that cryptochromes inhibit the germination through ABA induction. However, the mechanisms by which cryptochromes act during seed germination are still quite elusive regarding: (I) the induction and inhibition of the seed germination by BL, (II) BL irradiances and (III) different modes of action on the seed germination in different species. Regarding tomato, one of the most important crops in the world, information about the effect of BL in the germination is scarce. Few evidences show in tomato that BL can inhibit seed germination, but if cryptochromes are part of this response, nothing is known. Thus, the aim of the present proposal is to study the role of the cryptochromes during seed germination of tomato under BL. (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)

DE OLIVEIRA, REGINALDO; ALVES, FREDERICO ROCHA RODRIGUES; PRADO, EMILAINE DA ROCHA; GOMES, LETICIA DANIELLE LONGUINI; FRESCHI, LUCIANO; GAION, LUCAS APARECIDO; CARVALHO, ROGERIO FALLEIROS. CRYPTOCHROME 1a-mediated blue light perception regulates tomato seed germination via changes in hormonal balance and endosperm-degrading hydrolase dynamics. PLANTA, v. 257, n. 4, p. 13-pg., 2023-04-01. (18/20748-3)