Abstract:Resveratrol is a grape polyphenol with a variety of bioactivities.The precursor substances of resveratrol, polydatin, have high content in plants, such as Polygonum cuspidatum. In this paper, screening medium with polydatin was used to screen a strain that can convert polydatin into resveratrol from Polygonum cuspidatum. Then the screened strain was identified by morphology and 18S rDNA sequence analysis methods. The identified results showed that the strain was Penicillium camembert.