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dc.creatorRibeiro, Paula Rose de Almeida-
dc.creatorSantos, Jessé Valentim dos-
dc.creatorCosta, Elaine Martins da-
dc.creatorLebbe, Liesbeth-
dc.creatorAssis, Emanuelly Silva-
dc.creatorLouzada, Marina Oliveira-
dc.creatorGuimarães, Amanda Azarias-
dc.creatorWillems, Anne-
dc.creatorMoreira, Fatima Maria de Souza-
dc.identifier.citationRIBEIRO, P. R. de A. et al. Symbiotic efficiency and genetic diversity of soybean bradyrhizobia in Brazilian soils. Agriculture, Ecosystems and Environment, [Amsterdam], v. 212, p. 85-93, Dec. 2015.pt_BR
dc.description.abstractThe symbiotic N2-fixing genus Bradyrhizobium includes 29 species distributed throughout different geographic regions. Only five species have recently been described based on isolates from tropical soils, three species from Brazil (B. manausense, B. ingae, B. neotropicale) and two species from Peru (B. paxllaere e B. icense), although tropical region is considered to be the origin of legume rhizobia symbiosis. Besides, some authors suggested that Bradyrhizobium was introduced in Brazil with first soybeans inoculants from USA. In this work, 46 Bradyrhizobium strains were isolated from soils collected in different regions of Brazil (Midwest, Northeast, Southeast, and South), using soybean as a trap plant. These strains were characterized genetically by analyzing the 16S rRNA gene and five housekeeping genes (atpD, gyrB, dnaK, recA, and rpoB). They were also characterized in terms of their symbiotic efficiency with soybean plants grown under axenic conditions in Leonard jars. The phylogenetic analysis of housekeeping genes revealed the possible presence of novel species in the Northeast and Southeast soils, some of which exhibited high symbiotic efficiency with soybean plants. These results emphasize the great diversity among native strains belonging to Bradyrhizobium genus in Brazilian soils as well as potential ones to be used as inoculants. They also indicate that symbiotically efficient native bradyrhizobia occur in Brazilian soils and are independent of strains introduced as soybean inoculant.pt_BR
dc.sourceAgriculture, Ecosystems and Environmentpt_BR
dc.subjectSoil microorganisms – Growth regulatorspt_BR
dc.subjectSoybean – Nitrogen – Fixationpt_BR
dc.subjectBacteria – Nitrifyingpt_BR
dc.subjectHousekeeping genept_BR
dc.subjectMicro-organismos do solo – Reguladores de crescimentopt_BR
dc.subjectSoja – Nitrogênio – Fixaçãopt_BR
dc.subjectBactérias nitrificantespt_BR
dc.subjectGenes essenciaispt_BR
dc.subjectBradyrhizobium sp.pt_BR
dc.titleSymbiotic efficiency and genetic diversity of soybean bradyrhizobia in Brazilian soilspt_BR
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