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Diversity of native rhizobia isolated in south Brazil and their growth promotion effect on white clover (Trifolium repens) and rice (Oryza sativa) plants

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Diversity of native rhizobia isolated in south Brazil and their growth promotion effect on white clover (Trifolium repens) and rice (Oryza sativa) plants

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Título Diversity of native rhizobia isolated in south Brazil and their growth promotion effect on white clover (Trifolium repens) and rice (Oryza sativa) plants
Autor Granada, Camille Eichelberger
Arruda, Letícia Machado
Lisboa, Bruno Brito
Passaglia, Luciane Maria Pereira
Vargas, Luciano Kayser
Abstract In this study, rhizobia strains isolated from white clover (Trifolium repens) root nodules were evaluated in an effort to identify an efficient nitrogen-fixing rhizobia strain that can also improve the growth of rice plants (Oryza sativa). White clover plants were collected from seven sites in south Brazil, and 78 native rhizobia isolates were obtained. The genetic diversity analysis of those isolates was carried out by BOX-polymerase chain reaction. Overall, the native rhizobia isolated showed a high genetic diversity, but when the bacterial isolates from the same site were compared, the diversity was lower. One native rhizobia, POA3 (isolated from the Porto Alegre locality), was able to promote the growth of both plants and is therefore a good candidate for new inoculant formulation. Finally, we can conclude that the community of native rhizobia symbiont of white clover plants in southern Brazil is highly diverse and the growth promotion effect of rhizobia inoculation on rice plants was more pronounced in a poor nutrient substrate condition than in a rich nutrient substrate condition.
Contido em Biology and fertility of soils. Heidelberg. Vol. 50, n. 1 (Jan 2014), p. 123–132
Assunto Oryza sativa
Rhizobium
Trifolium repens
[en] Diversity
[en] Plant growth-promoting bacteria
[en] Rhizobia
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/122640
Arquivos Descrição Formato
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