interação entre fungos micorrízicos arbusculares e bactérias diazotróficas em trigo interaction between arbuscular mycorrhizal fungi and diazotrophic bacteria in wheat plants

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ID: 153834
2007
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Ranked #60 of 193 articles by views in proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006

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Abstract
O objetivo deste trabalho foi avaliar o efeito da inoculação de dois novos isolados de bactérias diazotróficas endofíticas e da interação destas bactérias com fungos micorrízicos arbusculares (FMAs), na cultura do trigo. Foi realizado um experimento em casa de vegetação, com dois isolados de bactérias diazotróficas endofíticas, IAC11HT (Achromobacter insolitus) e IAC12HT (Zoogloea ramigera), e dois FMAs (Glomus sp. e Acaulospora sp.). Houve efeito sinérgico da co-inoculação na colonização das raízes por bactérias diazotróficas, com o emprego do FMA do gênero Acaulospora. As plantas associadas a Glomus, na presença dos isolados bacterianos, apresentaram maior crescimento, acúmulo e aproveitamento dos nutrientes do que as plantas colonizadas por Acaulospora sp., entretanto, não superaram os tratamentos em que as bactérias e os fungos foram inoculados isoladamente. Apesar de não ter havido efeito benéfico da co-inoculação FMA-bactéria diazotrófica sobre a maioria dos parâmetros avaliados, essas novas bactérias propiciaram o dobro de crescimento, acúmulo e aproveitamento do N e P em plantas de trigo.
The aim of this work was to evaluate the inoculation effect of two new endophytic diazotrophic bacteria and the interaction between arbuscular mycorrhizal fungi (AMF) and these bacteria on wheat plants. The experiment was carried out in a greenhouse with the two strains of diazotrophic bacteria, IAC11HT (Achromobacter insolitus) and IAC12HT (Zoogloea ramigera), and two AMF (Glomus sp. and Acaulospora sp.). There was synergistic effect of the co-inoculation on root colonization by diazotrophic bacteria with the AMF of the genus Acaulospora. The plants colonized by Glomus associated to bacterial strains showed higher growth, accumulation and exploitation of the nutrients than plants colonized by Acaulospora sp., however, this effect did not surpass the treatments in which bacteria and fungi were inoculated separately. Although there were non-beneficial effects of the AMF-diazotrophic bacteria co-inoculation, for the most parameters assessed, these news bacteria strains promoted doubled shoot dry matter, shoot N and P concentration and accumulation in wheat plants.
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sala2007pesquisainterao Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Valéria Marino Rodrigues Sala;Sueli dos Santos Freitas;Adriana Parada Dias da Silveira
Journal proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006
Year 2007
DOI
10.1590/S0100-204X2007001100011
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007001100011
Keywords
nitrogen arbuscular mycorrhiza phosphorusagriculture (general)

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