Temporal dynamics of microbial communities in the rhizosphere of two genetically modified (GM) maize hybrids in tropical agrosystems

Autor(es)

Cotta, Simone Raposo ^[1] ; Franco Dias, Armando Cavalcante ^[2] ; Marriel, Ivanildo Evodio ^[3] ; Gomes, Eliane Aparecida ^[3] ; van Elsas, Jan Dirk ^[4] ; Seldin, Lucy ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Rio de Janeiro, Inst Microbiol Paulo Goes, Lab Genet Microbiana, Ctr Ciencias Saude, BR-21941590 Rio De Janeiro, RJ - Brazil

^[2] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Ciencia Solo, Piracicaba, SP - Brazil

^[3] EMBRAPA CNPMS Empresa Brasileira Pesquisa Agr, Ctr Nacl Pesquisas Milho e Sorgo, Sete Lagoas, MG - Brazil

^[4] Univ Groningen RUG, Ctr Ecol & Evolutionary Studies CEES, Dept Microbial Ecol, NL-9747 AG Groningen - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY; v. 103, n. 3, p. 589-601, MAR 2013.
• Citações Web of Science: 10

Resumo

The use of genetically modified (GM) plants still raises concerns about their environmental impact. The present study aimed to evaluate the possible effects of GM maize, in comparison to the parental line, on the structure and abundance of microbial communities in the rhizosphere. Moreover, the effect of soil type was addressed. For this purpose, the bacterial and fungal communities associated with the rhizosphere of GM plants were compared by culture-independent methodologies to the near-isogenic parental line. Two different soils and three stages of plant development in two different periods of the year were included. As evidenced by principal components analysis (PCA) of the PCR-DGGE profiles of evaluated community, clear differences occurred in these rhizosphere communities between soils and the periods of the year that maize was cultivated. However, there were no discernible effects of the GM lines as compared to the parental line. For all microbial communities evaluated, soil type and the period of the year that the maize was cultivated were the main factors that influenced their structures. No differences were observed in the abundances of total bacteria between the rhizospheres of GM and parental plant lines. (AU)

• Processo FAPESP: 08/54013-8 - Diversidade de arquéias e bactérias envolvidas na ciclagem do nitrogênio em sedimentos de manguezais
• Beneficiário: Armando Cavalcante Franco Dias
• Modalidade de apoio: Bolsas no Brasil - Doutorado