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Overexpression of wheat lipid transfer protein gene TaLTP5 increases resistances to Cochliobolus sativus and Fusarium graminearum in transgenic wheat

文献类型： 外文期刊

作者： Zhu, Xiuliang 1 ; Li, Zhao 1 ; Xu, Huijun 1 ; Zhou, Miaoping 2 ; Du, Lipu 1 ; Zhang, Zengyan 1 ;

作者机构： 1.Chinese Acad Agr Sci, Key Lab Crop Genet & Breeding, Natl Key Facil Crop Gene Resources & Genet Improv, Agr Minist,Inst Crop Sci, Beijing 100081, Peoples R China

2.Jiangsu Acad Agr Sci, Nanjing 210014, Peoples R China

关键词： Wheat;Lipid transfer protein;TaLTP5;Resistance;Common root rot;Fusarium head blight

期刊名称：FUNCTIONAL & INTEGRATIVE GENOMICS （ 影响因子：3.41； 五年影响因子：3.616 ）

ISSN：

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收录情况： SCI

摘要： The fungus Cochliobolus sativus is the main pathogen of common root rot, a serious soil-borne disease of wheat (Triticum aestivum L.). The fungus Fusarium graminearum is the primary pathogen of Fusarium head blight, a devastating disease of wheat worldwide. In this study, the wheat lipid transfer protein gene, TaLTP5, was cloned and evaluated for its ability to suppress disease development in transgenic wheat. TaLTP5 expression was induced after C. sativus infection. The TaLTP5 expression vector, pA25-TaLTP5, was constructed and bombarded into Chinese wheat variety Yangmai 18. Six TaLTP5 transgenic wheat lines were established and characterized. PCR and Southern blot analyses indicated that the introduced TaLTP5 gene was integrated into the genomes of six transgenic wheat lines by distinct patterns, and heritable. RT-PCR and real-time quantitative RT-PCR revealed that the TaLTP5 gene was over-expressed in the transgenic wheat lines compared to segregants lacking the transgene and wild-type wheat plants. Following challenge with C. sativus or F. graminearum, all six transgenic lines overexpressing TaLTP5 exhibited significantly enhanced resistance to both common root rot and Fusarium head blight compared to the untransformed wheat Yangmai 18.

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