Abstract: Antioxidant activity and inhibitory effects on plant pathogenic fungi of the acidolysis and enzymolysis products with different molecular weights of fenugreek polysaccharide were studied in this paper. Results showed that: acidolysis and enzymolysis products have effects on clearing hydroxyl radical (·OH )and superoxide anion(O·2). They inhibit the decline of superoxide dismutase (SOD) activity of liver and nephros of S180 mice, and reduced the production of MDA. These two kinds of products both have obvious inhibitory effects on 4 plant pathogenic fungi: Botrytis cinerea, F.moniliforme, Ascochyta fabae speg and Eggplant Verticillicum wilt. And their dose-effect relationship is obvious. Enzymolysis products have more obvious effects on antioxidant and antimicrobial activity than acidolysis products.

Key words: fenugreek polysaccharide, acidolysis products, enzymolysis products, antioxidant, activity