Estudo taxonÃmico e molecular de Zygomycetes em excrementos de herbÃvoros no Recife, Pernambuco, Brasil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Herbivore dung has been cited as one of the main substrates for isolation of Zygomycetes. However, there are few studies about species composition in these substrates and genetic variability between Zygomycetes from different geographic regions. The aims of this work were: a) To identify and isolate Zygomycetes from herbivore dung from Recife, Pernambuco, Brazil; b) To compare the number and species composition of Zygomycetes occurring in different animal dung and months; c) To compare the ITS rDNA sequences of the Mucorales isolates with sequences of the same species from different geographic regions deposited in the GenBank. The dung of tapir, camel, white-donkey, deer, waterbuck, llama, horse, and agouti were collected monthly from June/2005 to May/2006. Overall, thirty nine taxa, distributed in 15 genera, were identified. The results indicate that the number of taxa and species composition varies for each animal. The season influence Zygomycetes composition on dung but not the number of taxa. Polymorphism between different isolates of Cunninghamella elegans, Mycocladus blakesleeanus and Mucor circinelloides f. circinelloides was found; however, all specimens of Rhizopus oryzae were included in one clade. The molecular method employed here did not allow the four known forms of M. circinelloides to be resolved as the isolates formed one clade

ASSUNTO(S)

dimargaritales variabilidade genÃtica dimargaritales mucorales genetic variability zoopagales coprÃfilos micologia zoopagales mucorales coprophilous

Documentos Relacionados