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Study of the cadmium uptake kinetics and accumulation in tomato cultivars

Grant number: 17/05544-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): July 01, 2017
Effective date (End): November 30, 2020
Field of knowledge:Agronomical Sciences - Agronomy
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Ricardo Antunes de Azevedo
Grantee:Deyvid Novaes Marques
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Associated scholarship(s):18/20706-9 - Identification of key proteins in cadmium tolerance: proteomic analysis of CD tolerant and sensitive tomato cultivars, and reciprocally grafted plants, BE.EP.DR


Abiotic stresses commonly cause physiological limitations to plant growth and development, justifying studies efforts focused on understanding the endogenous mechanisms of plants that act in response to such stresses, ultimately contributing to increased plant tolerance. Cadmium (Cd) is one of the main contaminants that is a major threat to the environment, potentially damaging plant production. So far little is known about the kinetics of absorption and accumulation of this heavy metal in the tissues as well as on the dynamics of biochemical and molecular level responses throughout this process. The objective of this work is to characterize the physiological, biochemical and molecular alterations during the absorption and accumulation process of Cd, using sensitive and tolerant tomato genotypes. Methodologies will be used to analyze the kinetics of Cd and nutrient uptake over time in plant cultivation in a hydroponic system, in order to identify the most important times of recognition and response to stress. In a complementary way, reciprocal grafts between tolerant and sensitive tomato genotypes will be used as tools to study the signaling between the root system and the aerial part of the plants during the process of absorption and accumulation of the metal in the tissues. (AU)