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Drought tolerance and proteomics studies of transgenic wheat containing the maize C-4 phosphoenolpyruvate carboxylase (PEPC) gene

文献类型： 外文期刊

作者： Qin, Na 1 ; Xu, Weigang 2 ; Hu, Lin 2 ; Li, Yan 2 ; Wang, Huiwei 2 ; Qi, Xueli 2 ; Fang, Yuhui 2 ; Hua, Xia 2 ;

作者机构： 1.Nanjing Agr Univ, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China

2.Henan Acad Agr Sci, Wheat Res Inst, Zhengzhou 450002, Henan, Peoples R China

关键词： Phosphoenolpyruvate carboxylase (PEPC);Transgenic wheat;Drought tolerance;Proteomic research

期刊名称：PROTOPLASMA （ 影响因子：3.356； 五年影响因子：3.298 ）

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收录情况： SCI

摘要： Enhancing drought tolerance of crops has been a great challenge in crop improvement. Here, we report the maize phosphoenolpyruvate carboxylase (PEPC) gene was able to confer drought tolerance and increase grain yield in transgenic wheat (Triticum aestivum L.) plants. The improved of drought tolerance was associated with higher levels of proline, soluble sugar, soluble protein, and higher water use efficiency. The transgenic wheat plants had also a more extensive root system as well as increased photosynthetic capacity during stress treatments. The increased grain yield of the transgenic wheat was contributed by improved biomass, larger spike and grain numbers, and heavier 1000-grain weight under drought-stress conditions. Under non-stressed conditions, there were no significant increases in these of the measured traits except for photosynthetic rate when compared with parental wheat. Proteomic research showed that the expression levels of some proteins, including chlorophyll A-B binding protein and pyruvate, phosphate dikinase, which are related to photosynthesis, PAP fibrillin, which is involved in cytoskeleton synthesis, S-adenosylmethionine synthetase, which catalyzes methionine synthesis, were induced in the transgenic wheat under drought stress. Additionally, the expression of glutamine synthetase, which is involved in ammonia assimilation, was induced by drought stress in the wheat. Our study shows that PEPC can improve both stress tolerance and grain yield in wheat, demonstrating the efficacy of PEPC in crop improvement.

  • 相关文献

[1]Pyramiding expression of maize genes encoding phosphoenolpyruvate carboxylase (PEPC) and pyruvate orthophosphate dikinase (PPDK) synergistically improve the photosynthetic characteristics of transgenic wheat. Zhang, HuiFang,Zhang, HuiFang,Xu, WeiGang,Wang, HuiWei,Hu, Lin,Li, Yan,Qi, XueLi,Zhang, Lei,Li, ChunXin,Hua, Xia.

[2]Physiological characteristics and metabolomics of transgenic wheat containing the maize C-4 phosphoenolpyruvate carboxylase (PEPC) gene under high temperature stress. Qi, Xueli,Qi, Xueli,Xu, Weigang,Zhang, Jianzhou,Guo, Rui,Zhao, Mingzhong,Hu, Lin,Wang, Huiwei,Dong, Haibin,Li, Yan.

[3]Improvement of the photosynthetic characteristics of transgenic wheat plants by transformation with the maize C4 phosphoenolpyruvate carboxylase gene. Hu, Lin,Li, Yan,Xu, Weigang,Zhang, Qingchen,Zhang, Lei,Qi, Xueli,Dong, Haibin,Hu, Lin. 2012

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