文献类型： 外文期刊

作者： Zhang, SZ ¹ ; Yang, BP ² ; Feng, CL ² ; Chen, RK ³ ; Luo, JP; Cai, WW; Liu, FH;

作者机构： 1.Chinese Acad Trop Agr Sci, State Key Lab Trop Crop Biotechnol, Haikou 571101, Peoples R China

2.Chinese Acad Trop Agr Sci, State Key Lab Trop Crop Biotechnol, Haikou 571101, Peoples R China; Chinese Acad Trop Agr Sci, Inst Trop Biotechnol, Haikou 571101, Peoples R China; Minist Agr, Key Lab Ecophysiol & Genet Improvement Sugarcane, Fuzhou 350002, Peoples R China; Yunnan Univ, Coll Life Sci, Kunming 650091, Peoples R China

3.Chinese Acad Trop Agr Sci, State Key Lab Trop Crop Biotechnol, Haikou 571101, Peoples R China; Chinese Acad Trop Agr Sci, Inst Trop Biotechnol, Haikou 571101, Peoples R China; Minist Agr, Key Lab Ecophysiol & Genet Improvement Sugarcane, Fuzhou 350002, Peoples R Chin

关键词： drought tolerance;Grifola frondosa;Saccharum officinarum;trehalose synthase gene

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）

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收录情况： SCI

摘要： Trehalose is a nonreducing disaccharide of glucose that functions as a protectant in the stabilization of biological structures and enhances stress tolerance to abiotic stresses in organisms. We report here the expression of a Grifola frondosa trehalose synthase (TSase) gene for improving drought tolerance in sugarcane (Saccharum officinarum L.). The expression of the transgene was under the control of two tandem copies of the CaMVSSS promoter and transferred into sugarcane by Agrobacterium tumefaciens EHA105. The transgenic plants accumulated high levels of trehalose, up to 8.805-12.863 mg/g fresh weight, whereas it was present at undetectable level in nontransgenic plants. It has been reported that transgenic plants transformed with Escherichia coli TPS (trehalose-6-phosphatesynthase) and/or TPP (trehalose-6-phosphate phosphatase) are severely stunted and have root morphologic alterations. Interestingly, our transgenic sugarcane plants had no obvious morphological changes and no growth inhibitionin the field. Trehalose accumulation in 35S-35S: TSase plants resulted in increased drought tolerance, as shown by the drought and the drought physiological indexes, such as the rate of bound water/free water, plasma membrane permeability, malondialdehyde content, chlorophyll a and b contents, and activity of SOD and POD of the excised leaves. These results suggest that transgenic plants transformed with the TSase gene can accumulate high levels of trehalose and have enhanced tolerance to drought.