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大豆细菌性斑点病菌hrpZPsg12基因增强病原菌对大豆的致病性并引起烟草过敏性反应

ISSN号：1672-2779
期刊名称：《中国中医药现代远程教育》
时间：0
分类：S435.651[农业科学—农业昆虫与害虫防治;农业科学—植物保护]
作者机构：[1]青林农业大学农学院,吉林长春130118
相关基金：吉林农业大学科研启动基金资助项目“大豆细菌性斑点病菌hrpZPsg12蛋白功能的研究”（384）;农业部“十一五”转基因生物新品种培育重大专项“抗病虫转基因大豆新品种培育”（2008ZX08004-004）.

关键词：大豆细菌性斑点病菌, hrpZPsg12, 基因, 突变体, 致病性, Pseudomonas syringae pv. glycinea, hrpZpsg2 gene, Mutant, Pathogenicity, China

中文摘要：

[目的]明确hrpZPsg12基因对大豆细菌性斑点病菌致病性的影响。[方法]采用PCR方法从大豆细菌性斑点病菌中克隆hrpZPsg12基因,利用具有自杀特性的敲除质粒pKNOCK-Cm和具有功能互补作用的粘粒pUFR034,构建了hrpZPsg12基因的突变载体pKNOCK477-7和互补载体pU-FR1026-68,并筛选出hrpZPsg12基因的突变体477-1及其功能互补子1026-5。进一步将野生型Psg12、突变体477-1和互补子1026-5等3个菌株同时接种大豆叶片和烟草叶片,进行致病性测定和过敏性反应分析。[结果]所有被接种的大豆和烟草叶片都产生了反应斑。但是,反应斑的大小有差异,Psg12菌株接种的病斑较大,477-1的较小,互补子1026-5的接近野生型菌株Psg12。病斑中细菌繁殖量分析表明,野生型菌株Psg12繁殖量最高,突变体477-1的最低,互补子1026-5的接近野生型菌株Psg12的繁殖量。[结论]hrpZPsg12基因能够增强大豆细菌性斑点病菌对大豆的致病性,并且能够在烟草上产生过敏性反应。

英文摘要：

[ Objective ] The paper was to confirrm the effect of hrpZpsg12 gene on the pathogenicity of Pseudomonas syringae pv. glycinea. [ Method ] hrpZpsg12 gene was cloned from P. syringae using PCR method. The knockout plasmid pKNOCK-Cm with suicide characteristics and cosmid pUFR034 with complementation func- tion were used to construct the mutation vector pKNOCK477-7 and complementary vector pUFR1026-68 of hrpZpsg12 gene, the mutant 477-1 and the functional com- plementation unit 1026-5 of the gene was also screened out. Three strains including wild-type Psg12, mutant 477-1 and complementary unit 1026-5 were simultane- ously inoculated into soybean leaves and tobacco leaves, then pathogenicity determination and hypersensitive reaction analysis were carried out. [ Result] All the inoculated leaves of soybean and tobacco produced reaction lesion. However, the sizes of reaction lesion were different. The lesion in the leaves inoculated with Psgl2 was relatively large, while the lesion in the leaves inoculated with 477-1 was relatively small; the lesion of complementary unit 1026-5 was similar to wild- type Psgl2. Analysis of reproduction quantity of bacteria in lesions showed that the reproduction quantity of wild-type Psg12 was the highest, while that of mutant 477-1 was the lowest. The reproduction quantity of complementary unit 1026-5 was similar to that of wild-type Psg12. [ Conclusion] hrpZpsg12 gene could enhance the pathogenicity of P. syrimgae on Soybean and produce hypersensitive response in tobacco.

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