Effect of chitosan solution on the inhibition of Acidovorax citrulli causing bacterial fruit blotch of watermelon

文献类型： 外文期刊

第一作者： Li, Bin

作者： Li, Bin;Shi, Yu;Shan, Changlin;Zhou, Qing;Ibrahim, Muhammad;Li, Hongye;Xie, Guanlin;Wang, Yanli;Sun, Guochang;Wu, Guoxing

作者机构：

关键词： antibacterial activity;bacterial fruit blotch;watermelon;chitosan;Acidovorax citrulli

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：3.638； 五年影响因子：3.802 ）

ISSN： 0022-5142

年卷期： 2013 年 93 卷 5 期

页码：

收录情况： SCI

摘要： BACKGROUND: The production of watermelon in China has been seriously hampered by fruit blotch disease and limited control measures are now applied. Chitosan has been employed to control a variety of plant diseases and is considered to be the most promising biochemical to control this disease. RESULTS: The in vitro antibacterial effect of chitosan and its ability in protection of watermelon seedlings from bacterial fruit blotch were evaluated. Results showed that three types of chitosan, in particular, chitosan A at 0.40 mg mL1 significantly inhibited the growth of Acidovorax citrulli. The antibacterial activity of chitosan A was affected by chitosan concentration and incubation time. The direct antibacterial activity of chitosan may be attributed to membrane lysis evidenced by transmission electron microscopic observation. The disease index of watermelon seedlings planted in soil and the death rate of seedlings planted in perlite were significantly reduced by chitosan A at 0.40 mg mL1 compared to the pathogen control. Fresh and dry weight of watermelon seedlings planted in soil was increased by chitosan seed treatment, but not by chitosan leaf spraying. CONCLUSION: The results indicated that chitosan solution may have a potential in controlling bacterial fruit blotch of watermelon. (c) 2013 Society of Chemical Industry

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