Structure and physiological activity of conidial polysaccharides of Mycosphaerella pinodes. I.

Abstract
Four polysaccharides were extracted with acetic acid from conidia of a pea brown spot-causing fungus, Mycosphaerella pinodes. Fraction II-I showed activity to induce accumulation of pisatin, a phytoalexin. Its molecular weight was about 45000, and it was composed of .alpha.-1,2-linked mannose and .alpha.-1,4- and .alpha.-1,6-linked glucose. The sugar chains were branched with .alpha.-1,4,6-linkages and the non reducing terminal was glucose.