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CLIMATE WARMING AND HIGH CO2 IMPACT ON GENETIC AND BIOLOGICAL PARAMETERS OF REPRODUCTIVE SYSTEM OF ONE TROPICAL FORAGE LEGUME IN A TROP-T-FACE SIMULATION SYSTEM

Abstract

The observed and predicted climate change, due to global warming associated with increasing greenhouse gases, as CO2 will undoubtedly have a significant economic and ecological impact on the pastures, forests and agricultural crops on the planet. However, to date, the responses of tropical species to these phenomena under field conditions have been little studied. Thus, this research aims to evaluate the effects of future climate change (simulations of temperature increase at + 2 °C and CO2 concentrations at 600ppm) in the parameters of mating system and other biological characteristics related to reproductive phenology and floral morphology of the forage species Stylosanthes capitata Vogel. These simulations will be realized under field conditions using the Trop-T-FACE system (Temperature free air controlled enhancement and free-air carbon dioxide enrichment). For the genetic analyzes will be used microsatellite markers (SSR), since these markers are considered the most suitable for the study of genetic diversity and out-crossing rates due to their co-dominant inheritance and the highest polymorphism. The general hypothesis of this proposal is that the exposure of S. capitata to high temperature (+ 2 ° C) and CO2 (600 ppm) will increase the pollinators number, out-crossing rates, the genetic diversity of progeny, flower weight and positively will affect the morphology of the flower in development. In addition, the treatments will not affect biological characteristics such pollen viability, percentage of pollen and seed germination compared to control (C) treatment. The main contribution of this study is related to the generation of new and relevant scientific knowledge, with emphasis on genetic and biological parameters related to the reproduction of a tropical forage legume species in a climatic environment future of higher atmospheric CO2 concentration and heating. This study will provide the first genetic data of this kind in the context of adaptation (or not) to a future scenario of global warming. (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)
ANA LILIA ALZATE-MARIN; CAROLINA COSTA-SILVA; PRISCILA MARLYS SÁ RIVAS; FERNANDO BONIFACIO-ANACLETO; LETICIA GOBETT SANTOS; RÔMULO MACIEL DE MORAES FILHO; CARLOS ALBERTO MARTINEZ. Diagnostic fingerprints ISSR/SSR for tropical leguminous species Stylosanthes capitata and Stylosanthes macrocephala. Scientia Agricola, v. 77, n. 3, p. -, 2020. Web of Science Citations: 0.

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