The Population Fluctuation and Bioactivity of Endophytic Fungi from Mangrove Plants in Different Seasons

From December 2003 to August 2004,the endophytic fungi of Kandelia cande and Bruguiera gymnorrhiza,which were collected from Fugong in Fujian Province,were isolated for six times.290 strains endophytic fungi were obtained.The results showed the number fastigium of endophytic fungi from Kandelia candel and Bruguiera gymnorrhiza were in April and October to December respectively.Penicillium?Alternaria?Dothiorell and the nonsporulating groups were the dominant genuses of the endophytic fungi from Kandelia cande,while the endophytic fungi from Bruguiera gymnorrhiza mainly belonged to Cephalosporium?Alternaria?Penicillium,and so on.The differences of the host played an important role in the attribution of the temporal variations of different endophytic fungi.In the investigation of antimicrobial activities,40 strains(13.8% of the total isolates) with antimicrobial activities were screened out.17 strains(5.9% of the total isolates) could inhibit the growth of Raji and/or KB tumor cell lines.The active strains obtained mostly belonged to Penicillium,Alternaria,Paecilomyces and other 7 genuses.The endophytic fungi from 2 mangrove plants also displayed seasonal variations in their antimicrobial and antitumor activities.