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Oligosaccharins Enhance Ability of Disease-Resistant of Wheat andWere Applied Studies Against Fusarium Graminearum Schwabe

Yu Lu ;Li Wei; Tan Jian; Xie HuiPing (Chengdu Institute of Biology,Academia Sinica) Zhao Yinhuai; Wang ShuWen; Zhou WenChun(Nailing Institute of Crops Breeding,Jiangsu Provincial Academy of Agricultural Sciences)  
The accumulation of Wheat phytoalexins elicited by oligosaccharins from Gibberella zeae(Schw. )Petch mycelial walls was efficient in Wheat etiolated seediling. Wheat phytoalexins produced byoligosaccharins have shown inhibitory ability against Gibberella zeae(Schw. ) Petch. Ears and leaves of Wheat was treated by same oligosaccharins of different concentration. Finally, we present the results of determining on the bioactivity of oligosaccharins. Percentages of diseased ears of species Ning Mai 6 and Mian Yang 11 treated by 20 g/ml oligosaccharins have significantly decreased by 44. 9 and 26. 9 percent.Wheat were treated by oligosaccharins elicitor isolated from Wheat cell wall. The elicitors haveshown similar inhibitory ability. Oligosaccharins at a concentration of 20 g/ml significantly increasedthe ability of disease-resistant of Wheat. The defensive efficiency of Ning Mai 6, Yang Mai 6, ChuanYu 12 against Gibberella zeae(Schw. )Petch are 90. 1, 81. 0, and 88. 9 percent respectively. The accumulation of Wheat phytoalexins of resistant varieties are higher than susceptible ones.
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