Interação entre fungos micorrízicos arbusculares e bactérias diazotróficas em trigo
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 bactéri...
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Published in | Pesquisa agropecuaria brasileira Vol. 42; no. 11; pp. 1593 - 1600 |
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Format | Journal Article |
Language | English |
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01.11.2007
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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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AbstractList | 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. |
Author | Sala, Valéria Marino Rodrigues Silveira, Adriana Parada Dias da Freitas, Sueli dos Santos |
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Cites_doi | 10.1111/j.1469-8137.1981.tb01702.x 10.1007/BF00336304 10.1590/S0100-06832005000300004 10.3923/pjbs.2003.344.358 10.1093/jxb/eri197 10.1007/BF00336374 10.1590/S0103-84782005000500035 10.1111/j.1462-2920.2005.00942.x 10.1016/S0038-0717(99)00084-X 10.1080/01904168109362919 10.1134/S0003683806020013 10.1007/BF02378857 10.1094/MPMI.2004.17.10.1078 10.1111/j.1469-8137.2004.01212.x 10.1023/A:1004658000815 10.1128/AEM.70.6.3600-3608.2004 10.1023/A:1004709209009 10.1016/S0929-1393(00)00075-5 10.1016/S0929-1393(00)00092-5 10.1016/S0007-1536(70)80110-3 10.1046/j.1439-037X.2003.00026.x |
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