摘要:前期研究表明,蜡质芽胞杆菌AR156通过同时激活SA、JA/ET两个信号通路诱导拟南芥及番茄产生系统抗病性,同时伴随着细胞水平上的活性氧迸发、胼胝质沉积和染色质凝集等现象的发生,以及分子水平上的SAR、ISR标志基因的表达。在对AR156诱导系统抗性过程中不同时间点取样并进行高通量测序时,我们发现sly-miR482在AR156处理后表达丰度明显降低,Northern blot检测结果和测序结果一致。因此我们假设sly-miR482在蜡质芽胞杆菌AR156诱导植物产生系统抗性过程中起着重要的作用。为研究解析sly-miR482在调控蜡质芽胞杆菌AR156诱导植物系统抗性过程中的作用机制,通过Gateway克隆技术对sly-miR482a、sly-miR482b、sly-miR482c、sly-miR482d、sly-miR482e基因进行克隆,后利用农杆菌介导的叶盘转化法,在番茄植株内进行过量表达,获得过表达转基因植株。26208 毕业论文关键词:蜡质芽胞杆菌,小分子RNA miR482,诱导系统抗性,转基因、番茄
Overexpression of sly-miR482 gene tomato building and screening
Abstract:It has been indicated that Bacillus cereus AR156 induced the disease resistance of Arabidopsis thaliana and tomato by simultaneously activating SA and JA / ET signaling pathways, accompanied by reactive oxygen bursts at the cellular level, callose deposition and chromatin Agglutination and other phenomena, as well as the molecular level of SAR, ISR marker gene expression. We found that the expression of sly-miR482 was significantly reduced after AR156 treatment, and the results were consistent with the results of Northern blot analysis when the AR156 induced the system resistance at different time points. Therefore, we hypothesized that sly-miR482 plays an important role in the induction of plant resistance to Bacillus cereus AR156. The sly-miR482b, sly-miR482c, sly-miR482d and sly-miR482e genes were analyzed by Gateway cloning technique in order to study the mechanism of sly-miR482 in regulating the resistance of Bacillus cereus AR156 to plant system resistance. Clones were used to express overexpressing transgenic plants in Agrobacterium tumefaciens-mediated leaf disc transformation.
Key words: Bacillus cereus, small RNA miR482, induced systemic resistance ; transgenosis ; tomato
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