白桦BpGT14基因表达模式及对非生物胁迫诱导的响应
发布时间:2019-06-28 09:48
【摘要】:为了揭示BpGT14基因的分子结构特征,明确糖基转移酶BpGT14基因的表达模式及其对非生物胁迫的响应机制,初步探索其在白桦生长发育中的功能,在克隆白桦GT14基因全长序列的基础上,利用生物信息学对其理化性质进行了分析,应用实时荧光定量PCR技术分析BpGT14基因在野生白桦植株雄花序、木质部、韧皮部及叶片4个不同部位不同月份的表达差异;同时,选用白桦茎段悬浮细胞进行了水杨酸(SA)、盐胁迫(NaCl)、重金属镉(CdCl_2)及4℃低温非生物胁迫处理,检测目的基因对逆境的响应情况。研究结果表明,BpGT14基因开放阅读框为1 302 bp,编码433个氨基酸。分析其氨基酸序列发现,该蛋白含有乙酰氨基葡糖转移酶结构域,属于14家族的重要结构域。该蛋白与其他物种GT14蛋白比对分析表明,这些蛋白在100—350氨基酸区域内保守性较高,而且该基因与毛果杨的GT14家族基因同源性高达79%。不同部位不同月份的表达模式分析结果表明,BpGT14基因的表达具有部位及时间特异性,其各部位表达量均与月份相关,同时发现其在木质部、韧皮部及叶片中的表达量较高,而在雄花序中表达量较低。非生物胁迫处理结果显示,BpGT14基因对不同处理均产生响应,但其响应模式不尽相同:SA、CdCl_2及低温处理结果显示,处理初期(6 h)目的基因上调表达,6 h处理时分别达到了对照组的51.2、48.9及3.3倍,24 h后相对表达量与对照组相比均下调,只有低温处理在96 h恢复上调表达;NaCl处理使白桦BpGT14基因的表达量全部呈现下调趋势,24 h处理后,BpGT14基因表达量下调明显,24 h后比对照组降低了93.7%。
[Abstract]:In order to reveal the molecular structure characteristics of the BpGT14 gene, the expression pattern of the glycosyltransferase BpGT14 gene and the response mechanism to the non-biological stress are clarified, the function of the BpGT14 gene in the growth and development of the white birch is preliminarily explored, and on the basis of cloning the full-length sequence of the Betula platyphylla GT14 gene, The physical and chemical properties of BpGT14 gene were analyzed by using bioinformatics, and the expression of BpGT14 gene in the different parts of the inflorescence, xylem, phloem and leaf of the wild betula platyphylla was analyzed by real-time fluorescence quantitative PCR. At the same time, Salicylic acid (SA), salt stress (NaCl), heavy metal salt (CdCl _ 2) and low-temperature abiotic stress at 4 鈩,
本文编号:2507200
[Abstract]:In order to reveal the molecular structure characteristics of the BpGT14 gene, the expression pattern of the glycosyltransferase BpGT14 gene and the response mechanism to the non-biological stress are clarified, the function of the BpGT14 gene in the growth and development of the white birch is preliminarily explored, and on the basis of cloning the full-length sequence of the Betula platyphylla GT14 gene, The physical and chemical properties of BpGT14 gene were analyzed by using bioinformatics, and the expression of BpGT14 gene in the different parts of the inflorescence, xylem, phloem and leaf of the wild betula platyphylla was analyzed by real-time fluorescence quantitative PCR. At the same time, Salicylic acid (SA), salt stress (NaCl), heavy metal salt (CdCl _ 2) and low-temperature abiotic stress at 4 鈩,
本文编号:2507200
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