ISSN: 0973-7510

E-ISSN: 2581-690X

Yulong Chen1, Zhongkang Wang1, Zhenji Wang2, Qinyan Xia1 and Youping Yin1
1Genetic Engineering Research Center, School of Life Science, Chongqing University, Chongqing, 400030, China.
2Department of Chemistry and Life Science, Chuxiong Normal University, Chuxiong, 675000, China.
J Pure Appl Microbiol. 2015;9(Spl. Edn. 1):105-113
© The Author(s). 2015
Received: 19/03/2015 | Accepted: 07/05/2015 | Published: 31/05/2015

D-amino acids exist in many bacteria, fungi and insects, but little investigation into their function has been performed. In this study, we determined the antibacterial effect of D-Leu on Xanthomonas citri subsp. citri (Xcc), a plant pathogen that is extremely detrimental to the production of Citrus fruit. Our results showed that 2 mM D-Leu morphologically altered Xcc strain 101 from rod to chain form and 7 mM D-Leu caused Xcc strain 101 to lose pathogenicity and/or die. Electro-microscopic examination revealed that the bacterial chain was formed by many bacteria own some cell membrane, and the cellular membrane broken and protoplasm prolapse out. This discovery has the potential to provide a new preventative strategy against bacterial diseases of plants and to screen for biocontrol bacteria.


D-amino acids; plant pathogenic bacteria; morphological change; killing effect;Xanthomonas citri subsp. citri

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© The Author(s) 2015. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.