期刊
PLANT PATHOLOGY JOURNAL
卷 24, 期 3, 页码 357-360出版社
KOREAN SOC PLANT PATHOLOGY
DOI: 10.5423/PPJ.2008.24.3.357
关键词
avrBs3; citrus bacterial canker; Xanthomons axonopodis. pv. citri
资金
- Ministry of Agriculture and Forestry, Korea [105058-03-1-HD120]
Several pathotypes have been recognized in citrus bacterial canker, which causing serious damage in citrus cultivation area. To control the disease, it is important to understand the pathological diversity and reason of difference in virulence of the causal pathogen. We analyzed 124 strains of Xanthomonas causing citrus bacterial canker by southern hybridization with an internal 3.4-kb BamHI fragment from pthA genes Assuming each band represented an intact gene, each strain of Xanthomonas was estimated to have approximately 1 to 4 copies of pthA gene. X. a. pv. cifti A type had more than 3 copies of pthA gene, and the number of pthA gene in X. a. pv. cifti A*, A(w), and X. a. pv. aurantifolii B, C were different from I to 3 according to the strains. When the pthA gene profile was classified into 13 groups according to the number and size of hybridization bands, most of the A types belong to the 3A group, and 4A and 4B type was dominant when they had 4 bands. However, there was no general pattern of difference between the virulence and pthA gene group in this test.
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