Infection Process of Burkholderia glumae Before Booting Stage of Rice

文献类型： 外文期刊

第一作者： Li, Lu

作者： Li, Lu;Li, Qi-Qin;Huang, Shi-Wen;Li, Lu;Wang, Ling;Liu, Lian-Meng;Hou, Yu-Xuan;Huang, Shi-Wen

作者机构：

关键词： bacterial panicle blight;Burkholderia glumae;gfp-labelled;infection process;real-time fluorescence quantitative PCR;rice

期刊名称：JOURNAL OF PHYTOPATHOLOGY （ 影响因子：1.789； 五年影响因子：1.574 ）

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年卷期：

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收录情况： SCI

摘要： Burkholderia glumae is a well-known pathogen for causing bacterial panicle blight of rice. In this study, the infection process of B.glumae in rice plants at different growing stages was tracked by means of real-time fluorescence quantitative PCR. Burkholderia glumae tended to colonize at the growing point of rice plants, and the biomass of population was 10(4) to 10(8)CFU/g. The most intensive colonization was detected in the upmost leaf in the two-leaf period. However, after the two-leaf period, the population of pathogens decreased significantly, and they successfully recovered in the booting stage and broke out in panicles. We also illustrated the incubation location of B.glumae by presenting the infection pattern in the seedling and tillering stage of rice. Under fluorescent microscopy, the gfp-labelled pathogens were first found in the vascular bundle of lateral roots, taproots and injured cells, then they were observed in the root hairs, epidermal cells and main root cap. The pathogens in the vascular bundle laterally dispersed towards the epidermal cells. By spray application of a bacterial suspension, the pathogens landed on the leaf sheaths and leaves, colonized in the epidermal hairs and leaf hairs, or invaded into the cells through the stomas. At the same time, the pathogens from the vascular bundle of the roots spread into the vascular bundle of leaf sheaths and leaves, which caused the leaves to curl and wilt, beginning from the tip.

分类号： Q945

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