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
Related Articles
- EP ID EP601532
- DOI 10.16768/j.issn.1004-874X.2018.08.014
- Views 67
- Downloads 0
Dynamic monitoring of spring maize chilling injury in Shaanxi-Gansu-Ningxia Area
"In order to improve the estimated accuracy of daily mean temperature，multiple regression equations were constru-cted by coupling microwave brightness temperature and geographical factors，which realized the calculation...
Effect of combination of Sulfate-potassium magnesium on Citrus reticulata Blanco cv. tankan
"The effects of different rates of sulfate-potassium magnesium fertilizer include 20.7, 41.4, 62.1, 82.8 kg/667 m2 on foliar nutrient content, agronomic characters, fruit quality, yield and planting benefit of Citrus ret...
Comparative study on antioxidant activity of 10 Chinese herbal medicines
Ten commonly-used Chinese Herbal Medicines were investigated for their antioxidant properties of aqueous extracts using DPPH radical scavenging capacity assay, ferric reducing antioxidant potential (FRAP) assay, and Foli...
Effects of low temperature pre-cooling on the inner temperature and mass loss of longan fruits treated with SO2 fresh-keeping paper before and during storage at normal atmospheric temperature
"This paper aimed to study the effects of low temperature pre-cooling in refrigeration room at 5℃ on the inner temperature and mass loss of longan fruits covered with SO2 fresh-keeping paper and stored in sealed foam box...
Study on the production process of kapok dry flower
"In order to enrich the varieties of dried flowers on the market and meet people's needs for dried flowers, this article explored the production process of dried kapok flowers. The flowers were pretreated by Ethanol and...