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Effects of elevated CO2 concentration on the dynamics of stable isotopes of carbon and nitrogen in two tropical forage (Panicum maximum and Stylosanthes capitata) cultivated in consortium

Grant number: 12/03439-0
Support type:Scholarships in Brazil - Master
Effective date (Start): August 01, 2012
Effective date (End): August 31, 2014
Field of knowledge:Biological Sciences - Botany - Pant Physiology
Principal Investigator:Carlos Alberto Martinez y Huaman
Grantee:Laís Batista Carmo Silva
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Associated research grant:08/58075-8 - Miniface climate-change impact experiment to analyze the effects of elevated CO2 and warming on photosynthesis, gene expression, biochemistry, growth, nutrient dynamics and yield of two contrasting tropical forage species, AP.PFPMCG.TEM
Associated scholarship(s):12/17755-1 - Effects of elevated CO2 concentration on the dynamics of stable isotopes of carbon and nitrogen in two tropical forage (Panicum maximum and Stylosanthes capitata) cultivated in consortium, BE.EP.MS

Abstract

The global atmospheric concentration of carbon dioxide (CO2), a greenhouse gas (GHG) has increased significantly over time as a result of human activities. Due to this, the flora and fauna from all over the world are being increasingly affected by global climate change, which is already well pronounced (it is expected an increase in CO2 concentration of 390 ppm today to over 800 ppm in 2100). The CO2 rise causes several changes in biochemical and physiological processes of plants with C3 and C4 metabolism, such as photosynthesis, respiration and transpiration. Because of the fact that there is a complex interaction between different species and their environment, it is difficult to predict the outcome of global change on tropical pastures C3/C4 grown intercropped. Based on isotopic analysis that allow to investigate the dynamics of carbon and nitrogen in systems that simulate future climate conditions (technology based on techniques for the enrichment of CO2 in the air as the system FACE - free air carbon dioxide enrichment), this study may contribute to the development of techniques capable of measuring the ability of tropical plants to sequester carbon dioxide from the atmosphere. It also can help to understand the physiology of tropical plant species and provide forecasts for the possible rearrangements of the flora that should occur due to climate change. It is expected that the first study envolving the adaptation of a C4 grass (Panicum maximum) and a C3 legume (Stylosanthes capitata) growing in a consortium, the climatic conditions are expected in the coming years will be useful in regard to the possible role of forage plants as a sink of CO2 in the tropical region. (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)
GONZALEZ-MELER, MIQUEL A.; SILVA, LAIS B. C.; DIAS-DE-OLIVEIRA, EDUARDO; FLOWER, CHARLES E.; MARTINEZ, CARLOS A. Experimental Air Warming of a Stylosanthes capitata, Vogel Dominated Tropical Pasture Affects Soil Respiration and Nitrogen Dynamics. FRONTIERS IN PLANT SCIENCE, v. 8, FEB 1 2017. Web of Science Citations: 5.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SILVA, Laís Batista Carmo. Effects of warming and elevated atmospheric CO2 concentration on carbon and nitrogen dynamics of two tropical forage species (Panicum maximum and Stylosanthes capitata). 2014. Master's Dissertation - Universidade de São Paulo (USP). Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto Ribeirão Preto.

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