棉 花 学 报  Cotton Science     2005,17(6):323-327

 

棉花胚珠与纤维蛋白质的两种提取方法比较研究
刘  康,胡凤萍,张天真
(南京农业大学棉花研究所作物遗传与种质创新国家重点实验室,南京 210095)

摘要:分别用三氯乙酸—丙酮沉淀和苯酚抽提两种方法,提取棉花胚珠和纤维总蛋白质,发现用三氯乙酸—丙酮沉淀法提取得到的蛋白质,获得率为2.3 mg·g-1,双向电泳后,用胶体考马斯亮蓝染色法染色后检测的蛋白质点数极少;银染色后,发现蛋白质点数没有明显的增加。而用苯酚抽提法得到的蛋白质获得率达到10.4 mg·g-1,是三氯乙酸-丙酮沉淀法的5倍,双向电泳后,用胶体考马斯亮蓝染色法染色后检测的蛋白质点数可以达到923个;银染色,可以检测到1061个蛋白质点。等电点pI从pH 3~10都有分布,但是集中在pH 4.3~8.6。结果表明:酚抽提法具有获得蛋白质种类更多、pI分布范围较宽,蛋白质容易溶解等优点,而且该方法操作简便,是适用于棉花胚珠和纤维的蛋白质组学研究的理想方法。
关键词:棉花;胚珠;纤维;蛋白质
中图分类号:S562.035.3       文献标识码:A
文章编号1002-7807(2005)06-0323-05[全文,6052KB]

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