Primary Study on the Fungus P. cicadae and Its Sectors

摘要

Two sectors, sporing-type (JZD3-1) and hypha-type (JZD3-2), were isolated from P. cicadae on Sabouraud medium. The colony characters and conidiation between two sector isolates and the original strain (JZD3) were compared on different media. The contents of exopolysaccharide and protein, the activities of proteinase, SOD, POD and their pathogenicities to B. brassicae were tested. The results showed: The growth of the strain JZD3 was the fastest and the conidiation was largest on most media. As far as the contents of exopolysaccharide, SOD, POD and the pathogenicity to B. brassicae, JZD3 was also the best; however, the isolates JZD3-1 and JZD3-2 had the most proteinase and protein respectively.