稻瘟病菌致病性增强突变体B11的基因分析

doi:0.3969/j.issn.1001-7216.2009.06.08

中国水稻科学

稻瘟病菌致病性增强突变体B11的基因分析

吴小燕^1,2, 王教瑜^2，*,张震²,井金学¹,杜新法²,柴荣耀²,毛雪琴²,邱海萍², 姜华²,王艳丽²,孙国昌^2,*

¹西北农林科技大学植物保护学院，陕西杨陵 712100； ²浙江省农业科学院植物保护与微生物研究所，浙江杭州310021； *通讯联系人， E-mail： jiaoyuwang1@gmail.com； sungc01@sina.com

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-11-10 发布日期:2009-11-10

Analysis on Gene Locus of Magnaporthe oryzae B11, a PathogenicityEnhanced Mutant

WU Xiao-yan^{1, 2}, WANG Jiao-yu^2,*, ZHANG Zhen², JING Jin-xue¹, DU Xin-fa², CHAI Rong-yao², MAO Xue-qin², QIU Hai-ping², JIANG Hua², WANG Yan-li², SUN Guo-chang^2,*

¹Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; ²College of Plant Protection, Northwest Agricultural and Forest University, Yangling 712100, China; *Corresponding author, E-mail: jiaoyuwang1@gmail.com；sungc01@sina.com

Received:1900-01-01 Revised:1900-01-01 Online:2009-11-10 Published:2009-11-10

摘要/Abstract

摘要： 在农杆菌介导转化（AtMT）的稻瘟病菌突变体库中，筛选到一个菌丝生长增快，对大麦致病性增强的突变体B11。Southern杂交分析表明B11中TDNA为单拷贝插入。通过TAILPCR克隆插入位点侧翼序列，序列测定与比对分析显示TDNA位于假想基因MG01679的编码区内。利用PCR的方法，克隆基因的DNA和cDNA序列。该基因开放阅读框包括1个内含子和2个外显子，编码序列的长度为696 bp，编码231个氨基酸的多肽，编码产物属于ThiJ/PfpⅠ蛋白家族。因此，将该基因命名为MgThiJ1。MgThiJ1蛋白序列与尖胞镰刀菌假想蛋白FOXG_09029有57%的同源性，与禾谷镰刀菌假想蛋白FGSG_08979有54%的同源性。MgThiJ1基因可能为致病过程的负调控因子，其具体作用机制有待进一步研究。

关键词: 稻瘟病菌, 突变体, 致病性, 基因, 基因功能, 蛋白序列

Abstract: A Magnaporthe oryzae mutant B11 was obtained by Agrobacteriummediated transformation (AtMT) method, which enhanced the pathogenicity to barley. Southern blotting analysis indicated that TDNA insert in the B11 genome was single copy. TAILPCR and sequence alignment analysis indicated that the TDNA insertion broke the putative gene locus MG01679. By using PCRbased method, the DNA and cDNA of the gene locus were cloned and sequenced. The open reading frame of the gene includes one intron and two exons. And the coding sequence is 696 bp long and encodes a 231 amino acid peptide. Protein similarity analysis indicated that the product of the gene belongs to the ThiJ/PfpⅠ protein family, and the gene was thus assigned MgThiJ1. MgThiJ1 shows 57% similarity to FOXG_09029 from Fusarium oxysporum, and 54% similarity to FGSG_08979 from Fusarium graminearum in protein sequence. MgThiJ1 gene may be a negative regulator to vegetative growth and pathogenicity in filamentous fungi, and its specific mechanism need to be studied further.

Key words: Magnaporthe oryzae, mutant, pathogenicity, gene, gene function, protein sequence

吴小燕王教瑜张震,井金学,杜新法,柴荣耀,毛雪琴,邱海萍, 姜华,王艳丽,孙国昌,. 稻瘟病菌致病性增强突变体B11的基因分析[J]. 中国水稻科学 2009,23(6): 611-615 . , DOI: 0.3969/j.issn.1001-7216.2009.06.08 .

WU Xiao-yan,WANG Jiao-yu,ZHANG Zhen,JING Jin-xue,DU Xin-fa,CHAI Rong-yao,MAO Xue-qin,QIU Hai-ping,JIANG Hua,WANG Yan-li,SUN Guo-chang. Analysis on Gene Locus of Magnaporthe oryzae B11, a PathogenicityEnhanced Mutant [J]. Chinese Journal of Rice Science 2009,23(6): 611-615 ., DOI: 0.3969/j.issn.1001-7216.2009.06.08 .

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稻瘟病菌致病性增强突变体B11的基因分析

Analysis on Gene Locus of Magnaporthe oryzae B11, a PathogenicityEnhanced Mutant

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