棉花碱胁迫响应蛋白的初步鉴定

来源 :2015全国植物生物学大会 | 被引量 : 0次 | 上传用户:yidatian2009
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  土地盐碱化造成耕地面积减少,而盐碱地对作物的主要危害之一是碱胁迫。本文使用耐盐碱棉花品种H177 作为材料,通过改良的TCA-丙酮法提取用NaHCO3/Na2CO3 混合碱液处理后的四叶期棉花的真叶总蛋白,进行双向电泳实验,分离可能的碱胁迫响应蛋白。经过研究分析得到22 个显著差异点,其中有7 个上调蛋白和15 个下调蛋白。这些蛋白与光合作用、防御机制、能量代谢等相关。在根部,共鉴定出11 个差异蛋白,其中3 个上调,8 个下调,对比发现根部得到的差异蛋白种类大大有别于真叶中发现的蛋白。在接下来的实验中发现,在某段时间内,碱处理条件下得到的差异蛋白都是上调的蛋白,这些蛋白的种类不但包括上述部分还有一些其他方面的蛋白,如分子伴侣蛋白、肌动蛋白、有机酸相关蛋白等,对其中5 个表达差异最明显的蛋白在基因水平上进行了分析,发现它们之间的相似度达到40%。对这些蛋白的研究给棉花耐碱机制提供了新的思路。
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