Antifungal activity of two marine oligosaccharides to phytopathogens in vitro
XU Jun-guang, ZHAO Xiao-ming, BAI xue-fang, LI Shu-guang, DU Yu-guang
1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
Abstract: Two marine oligosaccharides, oligochitosan and oligocarrageenan, were evaluated for antifungal activity on mycelial growth of four phytopathogens including Pyricularia oryzae, Verticillium dahliae, Fusarium graminearum and Botrytis cinerea on potato dextrose agar (PDA) in vitro. A strong antifungal activity on mycelial growth and spore germination of Botrytis cinerea with ECso values of 680 mg/L and 162 mg/L was observed in oligochitosan. Oligochtiosan with a degree of polymerization from 2 to 20 showed higher antifungal activity on mycelial growth of Botrytis cinerea than oligochtiosan with a degree of polymerization from 2 to 10. In contrast, oligocarrageenan had no antifungal activity on the tested phytopathogens instead of improvement of mycelial growth in Pyricularia oryzae and Botrytis cinerea.
徐俊光, 赵小明, 白雪芳, 李曙光, 杜昱光. 两种海洋寡糖对植物病原真菌的抑制作用[J]. 大连海洋大学学报, 2007, 22(2): 153-155.
XU Jun-guang, ZHAO Xiao-ming, BAI xue-fang, LI Shu-guang, DU Yu-guang. Antifungal activity of two marine oligosaccharides to phytopathogens in vitro. Journal of Dalian Ocean University, 2007, 22(2): 153-155.