黄瓜是全球十大蔬菜栽培作物之一,我国的黄瓜总种植面积及总产量目前已跃居世界首位,而黄瓜霜霉病作为全球范围内黄瓜产区主要叶部病害之一,严重威胁着黄瓜的正常生产。鉴于目前黄瓜霜霉病的分子生物学研究较少和ESTs分析功能基因组具有的明显优越性,构建受霜霉菌侵染的黄瓜叶片cDNA文库并进行ESTs分析,对于研究黄瓜与霜霉菌互作过程中的基因表达,克隆黄瓜抗霜霉病基因,明了黄瓜的抗病机理具有重要指导意义。
试验比较了目前常用的十种RNA提取方法对黄瓜不同组织(根、茎、叶和幼果)总RNA的提取效果,进而采用改良SDS法提取接种霜霉病菌后第4h、8h、16h、24h、48h和72h的抗霜霉病黄瓜品种‘649’的叶片总RNA,等量混合作为反转录模板,使用CreatorTM SMARTTM cDNA Library Construction Kit构建霜霉菌接种初期黄瓜叶片的全长cDNA文库,从中随机大规模挑取阳性克隆进行序列测定并进行全面的生物信息学分析。主要研究结果如下:
1.黄瓜属于RNA易提取植物,十种方法基本上都可以从黄瓜四种组织中提取到RNA,但提取效果间存在一定的差异。十种方法...
【英文摘要】
Cucumber (Cucumis sativus L.) is one of the ten top cultivate vegetable crops in the world, and the total planting area and total yield of cucumber in China have taken the first place in the world. However, cucumber downy mildew, which is one of the most destructive diseases of cucumber leaves in cucumber production area, has great threat to cucumber production. In view of little is known about the molecular mechanisms of this disease and ESTs analysis has obvious advantages on studying functional g...