Diversity and Antimicrobial Activities of Endophytic Actinomycetes Isolated from Camptotheca acuminata Decne.

Abstract:

Ninety endophytic actinomycetes were isolated from surface-sterilized samples of Camptotheca acuminata Decne. collected from Yunnan University. Results of 16S rRNA gene sequences analysis showed that they belong to 10 genera, 6 families. Among them, 33.4% of endophytic actinomycete cultures presented antimicrobial activity. The polyketide synthasesⅠ(PKS-I), polyketide synthases Ⅱ(PKS-II) and non-ribosomal peptide synthase (NRPS) sequences were respectively detected by PCR in 28.9%, 44.4% and 48.9% of tested strains.