天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

當(dāng)前位置:主頁 > 科技論文 > 基因論文 >

煙草類胡蘿卜素降解關(guān)鍵基因NCED3的克隆及功能研究

發(fā)布時(shí)間:2018-05-19 19:49

  本文選題:煙草 + 類胡蘿卜素。 參考:《河南農(nóng)業(yè)大學(xué)》2016年碩士論文


【摘要】:煙葉中的類胡蘿卜素以及它的降解生成物是引起煙葉揮發(fā)香味物質(zhì)的主要前體物質(zhì),其中降解產(chǎn)物的類型以及濃度值都能夠作為煙草質(zhì)量的評價(jià)指標(biāo),因此,研究煙葉內(nèi)部的類胡蘿卜素降解有關(guān)的基因情況,確定這些基因的重要功能,對于提升煙葉質(zhì)量具有重大的科研價(jià)值。類胡蘿卜素裂解雙加氧酶是植物類胡蘿卜素降解代謝途徑中的關(guān)鍵基因,CCDs家族有9個(gè)成員,其中包括NCED2,NCED3,NCED5,NCED6,NCED9等,本研究通過同源克隆方法獲得煙草品種K326類胡蘿卜素降解關(guān)鍵基因NCED3兩個(gè)c DNA全長序列,并對其進(jìn)行生物詳細(xì)的生物信息學(xué)分析,采用干旱脅迫研究基因的表達(dá)情況,同時(shí)采用in-fusion和gateway方法分別構(gòu)建了過表達(dá)和抑制表達(dá)載體,農(nóng)桿菌介導(dǎo)法轉(zhuǎn)化煙草植株,研究結(jié)果為進(jìn)一步分析NCED3在煙草抗旱性的功能研究方面提供一定的基礎(chǔ)。主要研究結(jié)果如下:1克隆得到烤煙品種K326類胡蘿卜素降解關(guān)鍵基因NCED3 2個(gè)拷貝NCED3-1、NCED3-2,并提交NCBI Genbank,登錄號(hào)KM605434和KM605435。序列分析表明:K326NCED3-1和NCED3-2基因分別包含一個(gè)1842bp和1830bp的開放讀碼框(ORF),各編碼613個(gè)和609個(gè)氨基酸。跨膜區(qū)預(yù)測、親水性和信號(hào)肽分析表明很可能是定位于線粒體膜上的親水性跨膜蛋白。二級結(jié)構(gòu)預(yù)測模型顯示此蛋白結(jié)構(gòu)以β折疊和無規(guī)則卷曲為主。蛋白三級結(jié)構(gòu)預(yù)測分析表明NCED3-1與NCED3-2空間結(jié)構(gòu)極為相似。2 PEG6000干旱脅迫分析表明,干旱脅迫可以誘導(dǎo)NCED3基因表達(dá)以及內(nèi)源ABA的積累。且在處理12h之前,NCED3表達(dá)與ABA累積速度均呈現(xiàn)升高趨勢,之后逐漸降低。3構(gòu)建了K326 NCED3基因的過表達(dá)和RNAi表達(dá)載體,并采用農(nóng)桿菌介導(dǎo)法轉(zhuǎn)化煙草植株。獲得了NCED3-1過表達(dá)和抑制表達(dá)陽性植株。
[Abstract]:Carotenoids in tobacco leaves and their degradation products are the main precursors causing volatile aroma substances in tobacco leaves. The types and concentrations of degradation products can be used as indicators of tobacco quality evaluation. It is of great scientific value to study the genes related to carotenoid degradation in tobacco leaves and to determine the important functions of these genes in order to improve the quality of tobacco leaves. Carotenoid cleavage dioxygenase is a key gene in the pathway of plant carotenoid degradation and metabolism. There are nine members of the CCDs family, including NCED2, NCED3, NCED5, NCED6, NCED9, and so on. In this study, the full-length sequence of NCED3 two c DNA, a key gene of carotenoid degradation in tobacco variety K326, was obtained by homologous cloning method, and its bioinformatics was analyzed in detail, and the expression of the gene was studied by drought stress. At the same time, the overexpression and inhibition expression vectors were constructed by in-fusion and gateway methods respectively. Agrobacterium tumefaciens mediated transformation of tobacco plants. The results provided a basis for further analysis of the function of NCED3 in the study of tobacco drought resistance. The main results were as follows: 1. The two copies of the key gene NCED3 of carotenoid degradation in flue-cured tobacco variety K326 were cloned as follows: NCED3-1, NCED3-2, and submitted to NCBI Genbank, accession numbers KM605434 and KM605435. Sequence analysis showed that the gene K326NCED3-1 and NCED3-2 contained an open reading frame of 1842bp and 1830bp, encoding 613 and 609 amino acids respectively. The hydrophilicity and signal peptide analysis indicated that the transmembrane proteins were probably located on the mitochondrial membrane. The prediction model of secondary structure showed that the protein structure was mainly 尾-folding and irregular crimp. Protein tertiary structure prediction analysis showed that the spatial structure of NCED3-1 and NCED3-2 was very similar to that of NCED3-2. 2 PEG6000 drought stress analysis showed that drought stress could induce the expression of NCED3 gene and the accumulation of endogenous ABA. The expression of NCED3 and the accumulation rate of ABA increased before treatment for 12 h, then the overexpression of K326 NCED3 gene and the expression of RNAi were gradually decreased. The vector was transformed into tobacco plants by Agrobacterium tumefaciens (Agrobacterium tumefaciens). NCED3-1 overexpression and inhibition expression positive plants were obtained.
【學(xué)位授予單位】:河南農(nóng)業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:Q943.2;S572

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 賈娟娟;孟秀萍;劉蕊;夏勉;王喜萍;;擬南芥NCED3基因在水稻中的過量表達(dá)可以提高水稻的干旱脅迫耐受性[J];復(fù)旦學(xué)報(bào)(自然科學(xué)版);2008年03期

相關(guān)碩士學(xué)位論文 前1條

1 師婷婷;煙草類胡蘿卜素降解關(guān)鍵基因NCED3的克隆及功能研究[D];河南農(nóng)業(yè)大學(xué);2016年

,

本文編號(hào):1911405

資料下載
論文發(fā)表

本文鏈接:http://sikaile.net/kejilunwen/jiyingongcheng/1911405.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶44557***提供,本站僅收錄摘要或目錄,作者需要?jiǎng)h除請E-mail郵箱bigeng88@qq.com
日韩美成人免费在线视频 | 国产精品日韩欧美第一页| 国内外激情免费在线视频| 一区二区三区欧美高清| 亚洲成人黄色一级大片| 91在线播放在线播放观看| 91精品国产av一区二区| 亚洲精品欧美精品一区三区| 一区二区三区免费公开| 日本人妻免费一区二区三区| 国产原创激情一区二区三区| 国产一级内片内射免费看| 亚洲二区欧美一区二区| 好东西一起分享老鸭窝| 中文字幕中文字幕一区二区| 亚洲在线观看福利视频| 日本不卡在线一区二区三区| 经典欧美熟女激情综合网| 中文字幕一区二区久久综合| 亚洲欧美日韩另类第一页| 99日韩在线视频精品免费| 欧洲偷拍视频中文字幕| 大香蕉久久精品一区二区字幕| 在线观看视频日韩成人| 老司机精品福利视频在线播放| 精品人妻一区二区三区在线看| 欧美日不卡无在线一区| 日本高清二区视频久二区| 久久亚洲精品成人国产| 国产伦精品一区二区三区高清版 | 国内午夜精品视频在线观看| 成人欧美一区二区三区视频| 日本人妻免费一区二区三区| 国产三级视频不卡在线观看| 中文字幕免费观看亚洲视频| 国产在线一区二区三区不卡| 欧洲一级片一区二区三区| 激情综合网俺也狠狠地| 日本不卡一本二本三区| 国产一区二区三区午夜精品| 亚洲欧美日韩色图七区|