Nitrogen-Fixation in native leguminous species: strategy to increase carbon sequestration in plant communities

• Grant number: 10/05299-6
• Support Opportunities: Regular Research Grants
• Start date: August 01, 2010
• End date: November 30, 2012
• Field of knowledge: Biological Sciences - Botany - Pant Physiology
• Principal Investigator: Liliane Santos de Camargos
• Grantee: Liliane Santos de Camargos
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
• Associated researchers: Leandro Ferreira de Aguiar

Abstract

In terrestrial biomes the main source of fixed nitrogen are legumes that can establish a symbiotic relationship with bacteria of the Rhizobium and reduce atmospheric N2 to ammonia in the nodules. Under optimal conditions for the development of a vegetable is no need for a balanced inflow of nitrogen and carbon assimilated (organic). As the main form of available nitrogen in soil is nitrate which has a negative charge, produced by biological oxidation of ammonia by bacteria in the group of Nitrossomonas and Nitrobacter, and the load of the ground surface is also negative, this is easily leached from soil exist a chronic shortage of nitrogen in terrestrial biomes. Thus, a higher amount of N-disponible leads to greater carbon sequestration. Among the species that can establish this symbiotic relationship, there are species with low stability of the symbiotic front the presence of N-mineral, and those with high stability. The identification of stable species, enables this feature is best exploited in intercropping system with non-fixing species (eg in agro-forestry). Seedlings will fully nodulated mineral N (NO3-, NH4+) and have their main nitrogen compounds monitored in the tissues (roots and shoots) and xylem sap. In species with more favorable characteristics, fixation and stability of the anchorage system will be evaluated nitrogenase activity in different conditions. Thus it is intended to identify the species that have high fixation associated with stability of symbiotic system. These species will be tested in association with Eucalyptus in the experimental area in the city Selviria-MS, Brazil, evaluating the effect of association with legumes on forest productivity (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)

VITOR MOREIRA; GILBERTO COSTA JUSTINO; LILIANE SANTOS CAMARGOS; LEANDRO FERREIRA AGUIAR. Características adaptativas da associação simbiótica e da fixação biológica do nitrogênio molecular em plantas jovens de Lonchocarpus muehlbergianus Hassl., uma leguminosa arbórea nativa do Cerrado. Rodriguésia, v. 65, n. 2, p. 517-525, 2014-06-00. (10/05299-6)

FERREIRA, TASSIA CAROLINE; AGUILAR, JAILSON VIEIRA; SOUZA, LUCAS ANJOS; JUSTINO, GILBERTO COSTA; AGUIAR, LEANDRO FERREIRA; CAMARGOS, LILIANE SANTOS. pH effects on nodulation and biological nitrogen fixation in Calopogonium mucunoides. BRAZILIAN JOURNAL OF BOTANY, v. 39, n. 4, p. 1015-1020, DEC 2016. (10/05299-6, 11/00927-1)