Phytochrome A, B1 and B2 of tomato on compatible solutes accumulation during seed germination under water deficit

• Grant number: 13/07331-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2013
• End date: November 30, 2013
• Field of knowledge: Biological Sciences - Botany - Pant Physiology
• Principal Investigator: Rogério Falleiros Carvalho
• Grantee: Lucas José Travessa
• Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Phytochromes are the best characterized and most extensively studied type of photoreceptors which control plant growth and development from germination to flowering. However, although the control of seed germination by the phytochromes is the most clear and well known response, the biochemical pathways by which these photoreceptors control seed germination seems to be very complex and to involve molecules that are essential to the embryo growth, such as compatible solutes which are very important molecules in response to abiotic stresses. The literature may support this approach: (a) the compatible solutes accumulation in seed during germination may have an important role in response to abiotic stresses, particularly drought stress. (b) Light may modulate the compatible solutes accumulation in seed and (c) phytochromes are the most obvious photoreceptors which control seed germination. Thus, to explore this approach, the aim of this work is to verify the role of phytochromes A, B1 and B2 of tomato on accumulation of compatible solutes during seed germination in response to drought stress.