期刊
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
卷 93, 期 5, 页码 1010-1015出版社
WILEY-BLACKWELL
DOI: 10.1002/jsfa.5812
关键词
antibacterial activity; bacterial fruit blotch; watermelon; chitosan; Acidovorax citrulli
资金
- Zhejiang Provincial Natural Science Foundation of China [Y3090150]
- Zhejiang Provincial Project [2010R10091]
- Fundamental Research Funds for the Central Universities
- Agricultural Ministry of China [nyhyzx 201003029, 201003066, 201303015]
- State Education Ministry
- Key Subject Construction Program of Zhejiang for Modern Agricultural Biotechnology and Crop Disease Control [2010DS700124-KF1101, 2010DS700124- KF1203]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
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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