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GOTTARDO, E.P. Diversity of endophytic diazotrophic bacteria of red mangrove (Rhizophora mangle) and evaluation of the biotechnological potential. 2009. 85 f. Dissertacao (Mestrado em Biotecnologia) Instituto de Ciencias Biomedicas, Universidade de Sao Paulo, 2009. Mangroves are considered a coastal ecosystem, located in the transition between the terrestrial and marine environments. This environment is typical of tropical and subtropical regions and is found throughout the world, mainly in Brazil, Indonesia and Australia. In our country, the mangroves can be found from the Amapa to the south of Santa Catarina showing, almost always, conditions for feeding, breeding and protection of biodiversity in the ecosystem. The occurrence of a large amount of organic matter enhances the fact that microorganisms are important in the cycling of nutrients in these environments. Most of these microorganisms transform the dead vegetation in nutrients that can be used by plants, recycling and giving continuity to the organic flow of a mangrove. The biological nitrogen fixation is the process by which microorganisms existing perform the reduction of atmospheric N2 to ammonia, process catalyzed by the nitrogenase enzyme complex. These microorganisms, when endophytic, determine the atmospheric N2 "in plant" and transfer the products to the host, showing great potential as diazotrophic. Endophytic microorganisms can be extremely relevant to the plant existing in mangrove swamps, because live in the interior of these, in its entire life cycle or only part of it, not harm him or cause any apparent damage to it. The endophytic can give to your host important characteristics such as greater resistance to conditions of stress, changes in physiological conditions, supply of nutrients, production of plant growth regulators and other components of biotechnological interest (such as enzymes, antibiotics and drugs of pharmaceutical interest) . This paper therefore finds the diversity of endophytic diazotrophic bacteria exist in red mangrove (Rhizophora mangle) of Ilha do Cardoso (Cananeia SP) and study the functional biodiversity of the main groups and potential biotechnology.

Diversidade de bactérias diazotróficas endofíticas de mangue vermelho (Rhizophora mangle) e avaliação do potencial biotecnológico.