Effects of Partially N-acetylated Chitosans to Elicit Resistance Reaction on Brassica napus L.

作     者：ZHANG Xue-kun, TANG Zhang-lin, CHEN Li, GUO Yi-hong, CHEN Yun-ping and LI Jia-na(Agronomy Department, Southwest Agricultural University , Chongqing 400716 , China) 

作者机构：Agronomy Department Southwest Agricultural University Chongqing 400716 China 

出 版 物：《Agricultural Sciences in China》 (中国农业科学（英文版）)

年 卷 期：2002年第1卷第5期

页      面：516-519页

学科分类：09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学] 

基　　金：the Science and Technology Commission of Chongqing 

主　　题：Brassica napus L. Chitosan Degree of acetylation Resistance reaction 

摘      要：The effects to elicit resistance reaction on oilseed rape (Brassica napus L. cv Xinongchangjiao ) by four partially N-acetylated chitosan 7B, 8B, 9B and 10B (Degree of acetylation (D. A.) is 30% , 20% , 10%, 0%, respectively) and Glycol chitosan (GC, D.A. is 0%) were investigated and compared. Results showed that chitosan were similar to salicylic acid (SA), and could induce resistance reaction, but the reaction was influenced by the degree of acetylation of chitosan. Fully deacetylated chitosans, 10B and GC, elicited chitinase activity, but partially acetylated chitosan, 7B, 8B and 9B, inhibited chitinase activity. Phenyalanine ammonia-lyase (PAL) was also elicited. Elicitor activity increased with on increasing degree of acetylation, 7B induced highest PAL activity among all chitosans. All chitosans induced peroxidase (POD) in a similar level. After elicited by glycol chitosan, like SA treatment, the seedlings increased disease resistance to Sclerotinia sclerotiorum significantly.