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Position: Home > Articles > Identification of Corn Bacterial Wilt Pathogen by Nested-PCR Based on 16S rDNA Acta Phytopathologica Sinica 2005,35 (5) 420-427

16S nested-PCR技术检测玉米细菌性枯萎病菌(英文)

作  者:
吴琼;陈枝楠;范怀忠;金显忠
单  位:
华南农业大学资环学院植物病理学系;深圳出入境检验检疫局
关键词:
玉米细菌性枯萎病菌;16SrDNA;检测;巢式PCR
摘  要:
玉米细菌性枯萎病是玉米上的重要种传病害,病原菌为Pantoea stewartiisubsp.stewartii。本研究设计了16S通用引物,扩增该病菌及其近似种的16S rDNA,通过序列测定和分析,针对该病菌设计了特异性引物,采用nested-PCR技术,能够准确地区别该病菌及其近似种,检测的灵敏度在DNA水平上达到10-3pg级,检测活菌则达到2 cfu。检测人工污染的玉米种子时,不受种子提取液中其它物质的干扰,灵敏度依然达到2 cfu。
译  名:
Identification of Corn Bacterial Wilt Pathogen by Nested-PCR Based on 16S rDNA
作  者:
WU Qiong~(2),CHEN Zhi-nan~(1*),FAN Huai-zhong~(2),JIN Xian-zhong~(1)(~(1)Shenzhen Entry-Exit Inspection and Quarantine Bureau,Shenzhen 518010,China;~(2)Phytopathology Department,College of Environment and Resourses,South China Agricultural University,Guangzhou 510640,China)
关键词:
Pantoea stewartii subsp.stewartii;16S rDNA;detection;nested-PCR
摘  要:
Pantoea stewartii subsp.stewartii is the seed-borne causative agent of bacterial wilt and leaf blight of sweet corn and maize.In this study,a specific 16S rDNA-based nested-PCR(nPCR) was developed to(identify) the bacterium from a range of closely related bacteria.This PCR assay was proved to be highly sensitive with the detection limit of 10~(-3) pg genomic DNA or 2 colony forming units(cfu).Moreover,this PCR(assay) successfully detected the target bacteria as few as 2 cfu when tested with artificially contaminated seeds,and the sensitivity was not affected by seed compounds

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