白樺BpGT14基因表達模式及對非生物脅迫誘導的響應
發(fā)布時間:2019-06-28 09:48
【摘要】:為了揭示BpGT14基因的分子結構特征,明確糖基轉移酶BpGT14基因的表達模式及其對非生物脅迫的響應機制,初步探索其在白樺生長發(fā)育中的功能,在克隆白樺GT14基因全長序列的基礎上,利用生物信息學對其理化性質進行了分析,應用實時熒光定量PCR技術分析BpGT14基因在野生白樺植株雄花序、木質部、韌皮部及葉片4個不同部位不同月份的表達差異;同時,選用白樺莖段懸浮細胞進行了水楊酸(SA)、鹽脅迫(NaCl)、重金屬鎘(CdCl_2)及4℃低溫非生物脅迫處理,檢測目的基因對逆境的響應情況。研究結果表明,BpGT14基因開放閱讀框為1 302 bp,編碼433個氨基酸。分析其氨基酸序列發(fā)現(xiàn),該蛋白含有乙酰氨基葡糖轉移酶結構域,屬于14家族的重要結構域。該蛋白與其他物種GT14蛋白比對分析表明,這些蛋白在100—350氨基酸區(qū)域內(nèi)保守性較高,而且該基因與毛果楊的GT14家族基因同源性高達79%。不同部位不同月份的表達模式分析結果表明,BpGT14基因的表達具有部位及時間特異性,其各部位表達量均與月份相關,同時發(fā)現(xiàn)其在木質部、韌皮部及葉片中的表達量較高,而在雄花序中表達量較低。非生物脅迫處理結果顯示,BpGT14基因對不同處理均產(chǎn)生響應,但其響應模式不盡相同:SA、CdCl_2及低溫處理結果顯示,處理初期(6 h)目的基因上調表達,6 h處理時分別達到了對照組的51.2、48.9及3.3倍,24 h后相對表達量與對照組相比均下調,只有低溫處理在96 h恢復上調表達;NaCl處理使白樺BpGT14基因的表達量全部呈現(xiàn)下調趨勢,24 h處理后,BpGT14基因表達量下調明顯,24 h后比對照組降低了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,
本文編號: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,
本文編號:2507200
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