膨胀素在果实完熟中的作用

 概述了细胞壁蛋白质膨胀素(Expansin)的发现、作用机制、基因家族、功能和研究现状。重点论述了膨胀素在果实完熟中的作用及其与细胞壁酶之间的相互关系，提出了利用转基因技术调节果实完熟和软化的新策略。关键词：中图分类号：

The Role of Expansin in the Fruit Growth and Development

Many proteins involve fruit ripening,of which a class of protein called expansin is a new discovered member.During fruit ripening modification of the primary cell wall is required.Expansin,without enzyme activity,but has been shown to promote cell wall loosing.There are evidences expansin binding in cellulose microfibrils disrupting the hydrogen bonds formed with xyloglucan during fruit ripening.In order to let more people to know the new area,its current status and developing trands were reviewed.The discovery,mechanism,gene family and function of expansin were introduced.Their role in the fruit ripening was discussed.Correlation with cell wall enzymes of expansin was suggested.New strategies using transgenic technology to regulate fruit ripening were proposed.