Fungos endofíticos associados à Vellozia compacta Mart. ex Schult. F. (Velloziaceae) presente em afloramentos rochosos nos estados de Minas Gerais e Tocantins

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The Vellozia compact Mart. ex Schult. &Schult. F. (Velloziaceae), popularly known as canela-de-ema, is a tropical monocot, endemic, common in quartzite formations and adapted to multiple biotic and abiotic stresses. Endophytic fungi are microorganisms that live inside the vegetal tissues, in spaces inter or intracellular, without causing any apparent damage and they are poorly known, both in terms of biodiversity, as the various ecological factors involved in fungus-host and fungus-habitat of the plant involved association. In this study evaluated the presence of endophytic fungi associated with leaves and roots of V. compact on rocky outcrops of the states of Minas Gerais and Tocantins. Fragments of leaves and roots without any apparent damage or disease were targeted for isolation of endophytic fungi. After collection and isolation were obtained 97 isolates of endophytic fungi, 43 obtained from vellozias present in Serra do Ouro Branco and 54 of the vellozias present in Parque Estadual do Jalapão. Of the total, 37 isolates were obtained from the leaves and 60 from the roots. All isolates were properly preserved in the Culture Collection of Fungi of Microbiology Laboratory DECBI/ICEB/UFOP. The fungi were identified by sequencing of the regions ITS1-5.8S-ITS2 of rDNA gene and belong to the genus Acarospora A. Massal, Chaetomium Kunze, Diaporthe Nitschke, Gelasinospora Dowding, Fusarium Link, Penicillium Link, Pestalotiopsis Steyaert, Phoma Sacc., Phomopsis (Sacc.) Sacc., Xylaria Hill ex Schrank, Alternaria Nees, Cladosporium Link, Simplicillium Zare &W. Gams, Teratosphaeria Syd. &P. Syd. Among the identified species, Fusarium oxysporum was the most frequent, followed by Pestalotiopsis microspora and Cladosporium cladosporioides. In the genus level, Penicillium and Phomopsis were the most frequent. The Colonization Rate (Tc) obtained from V. compact was 20%, being 16.6% higher in PEJ than SOB and 22% higher in roots than in leaves. The results of this study showed that V. compact is an interesting and unique natural reservoir of endophytic fungi.

ASSUNTO(S)

vellozia compacta biodiversity endophytic fungi endemism. ecologia endemismo. fungos endofíticos biodiversidade fungal ecology vellozia compacta ecologia de fungos

ACESSO AO ARTIGO

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