Abstract

A survey of the endophytic Pestalotiopsis associated with 27 plant species belonging to four families in Hainan Province was carried out from 2007 to 2008. Colonization frequencies of endophytic Pestalotiopsis species varied in the host plant’s tissues, sites and natural environmental conditions. Species composition of endophytic Pestalotiopsisvaried in different families of plants. A total of 43 endophytic Pestalotiopsis species were isolated, of which 23, 11, 9 and 8 species were obtained from families of Palmae, Rhizophoraceae, Podocarpaceae and Planchonellae, respectively. The species ofPestalotiopsis isolated from different hosts in Palmae family varied from 1 to 7. The colonization frequencies of endophytic Pestalotiopsis varied from environmental factors. The colonization frequencies of endophytic Pestalotiopsis in dry years were lower than that in usual years. Shannon-Wiener index of endophytic Pestalotiopsis in Palmae, Rhizophoraceae, Podocarpaceae and Planchonellae changed from 1.4775 to 2.5013. Evenness index changed from 0.3624 to 1.0431. Richness index of endophyticPestalotiopsis had no correlation with Shannon-Wiener index and evenness index. The coefficient of community of endophytic Pestalotiopsis among the four plant families was less than 0.5, showing low similarity.

Key words: Endophytic Pestalotiopsis, colonization frequencies, diversity, host preference, richness index.