Identification of the pathogen causing leaf spot of Polyscias guifoylei in Guangzhou
Journal Title: 广东农业科学 - Year 2018, Vol 45, Issue 8
Abstract
"Leaf spot is a new disease of Polyscias guifoylei in Ghuangzhou, resulting in seriously economic loss of P. guifoylei. It’s occurrance rate was 10%-50%. In this study, the pathogen isolate FLT4 was obtained from diseased P. guifoylei samples from Guangzhou. Identification of the isolate was carried out through physiological and biochemical identification and phylogeny analysis of 16S rRNA sequences, the results showed that FLT4 was clustered in the same branch with Xanthomonas campestris pv. vesicatoria、X. axonopodis and X. citri. According to Bergey’s Manual of Systematic Bacteriology (Second Edition), Xanthomonas campestris pv. vesicatoria and X. citri are classified in X. axonopodis. Then, the results of physiological and biochemical characteristics indicated that the similarity of pathogenic isolate FLT4 and X. axonopodis was 55.56%. Therefore, the pathogen of leaf spot of P. guifoylei was preliminarily identified as a Xanthomonas axonopodis."
Authors and Affiliations
Yu FU, Chun-ping YOU
Keywords
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- EP ID EP601532
- DOI 10.16768/j.issn.1004-874X.2018.08.014
- Views 63
- Downloads 0
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