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FUNGAL ENDOPHYTES ASSOCIATED WITH THREE SOUTH AMERICAN MYRTAE (MYRTACEAE) EXHIBIT PREFERENCES IN THE COLONIZATION AT LEAF LEVEL.
Clustered responses
Fungal distribution
Endophytic fungi
Statistical modelling
Autor(es)
Afiliação
Departamento de Ciências Biológicas. Laboratório de pesquisa em Microbiologia. Universidade Estadual de Feira de Santana. Feira de Santana, BA, Brazil/Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Departamento de Estatística. Belo Horizonte, MG, Brazil
Universidade Federal do Rio de Janeiro. Instituto de Economia. Rio de Janeiro, RJ, Brazil
ADepartamento de Ciências Biológicas. Laboratório de pesquisa em Microbiologia. Universidade Estadual de Feira de Santana. Feira de Santana, BA, Brazil/Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Departamento de Estatística. Belo Horizonte, MG, Brazil
Universidade Federal do Rio de Janeiro. Instituto de Economia. Rio de Janeiro, RJ, Brazil
ADepartamento de Ciências Biológicas. Laboratório de pesquisa em Microbiologia. Universidade Estadual de Feira de Santana. Feira de Santana, BA, Brazil/Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Belo Horizonte, MG, Brazil
Resumo em Inglês
Fungal endophytes associated with Myrtaceae from Brazil and Argentina were isolated at three levels of nesting: leaf, individual host trees, and site collection. The alternating logistic regression (ALR) was used to model the data because it offers a computationally convenient method for fitting regression structures involving large clusters. The objectives of this study were to determine: (i) whether the colonization pattern is influenced by environmental variables, (ii) if there is some leaf part they prefer to colonize; (iii) if there is some fungal endophyte aggregation between hierarchical levels; (iv) what the distance effect is on the fungal association. The environmental variables were statistically significant only for Xylaria, i.e., when the elevation and water precipitation increase and the temperature decreases, the odds ratio of finding another fungal endophyte of that genus previously found increases. Sordariomycetes, Xylariales, and Xylaria exhibited leaf fragment preference to petiole and tip. Fungal endophytes showed association within leaf. The horizontal transmission mode and the dispersal limitation may explain this association at the leaf level. Moreover, our results suggest that when a fungal endophyte infects a leaf or host tree individual, the odds ratio of dispersal inside them is greater.
Palavras-chave em inglês
Alternating logistic regressionClustered responses
Fungal distribution
Endophytic fungi
Statistical modelling
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