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林产化学与工业 ›› 2013, Vol. 33 ›› Issue (5): 106-114.doi: 10.3969/j.issn.0253-2417.2013.05.021

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肌醇在植物体内的代谢概述——肌醇作为细胞壁木聚糖和果胶前驱物的代谢途径

张梦, 谢益民, 杨海涛, 姚兰   

  1. 湖北工业大学 制浆造纸工程学院, 湖北 武汉 430068
  • 收稿日期:2012-09-28 修回日期:1900-01-01 出版日期:2013-10-30 发布日期:2013-10-30
  • 通讯作者: 谢益民,教授,博士生导师,主要研究方向:木质素的生物合成、化学结构及资源化研究;E-mail:ppymxie@scut.edu.cn。

Myo-inositol Metamolism as the Precursor of Xylan and Pectin in Plants

ZHANG Meng, XIE Yi-min, YANG Hai-tao, YAO Lan   

  1. School of Pulping & Papermaking Engineering, Hubei University of Technology, Wuhan 430068, China
  • Received:2012-09-28 Revised:1900-01-01 Online:2013-10-30 Published:2013-10-30

摘要: 肌醇又称环己六醇,在植物发育中有着重要的生物学功能,肌醇有9种同分异构体,其中肌肉肌醇(myo-肌醇)是植物细胞中含量最为丰富的一种异构体,在植物体内,myo-肌醇是葡萄糖在己糖激酶、肌醇-1-磷酸合成酶和碱性磷酸酶的作用下成环生成的产物,参与植物体内重要的氧化代谢途径。植物细胞壁生物合成与肌醇代谢有着紧密联系,木聚糖和果胶是植物细胞壁多糖的重要组成成分,可由肌醇通过氧化途径代谢生成,这为同位素示踪法研究植物细胞壁中木质素与木聚糖和果胶之间的连接形式提供了重要依据,对植物纤维化学和制浆造纸研究有着重要意义。

关键词: 肌肉肌醇, 生物合成, 代谢途径, 多糖, 细胞壁

Abstract: Inositol, known as cyclohexanehexol, has very important biological functions in the growth of plants. The myo-inositol is the most abundant isomer of inositol in plants which is formed by glucose cyclization catalyzed by hexokinase, myo-inositol-1-phosphate synthase and alkaline phosphatase. It takes part in some vital oxidation pathway in plants. Cell wall formation has a close relationship with the metabolism of myo-inositol. Xylan and pectin are important contents of cell wall polysaccharides can be formed by myo-inositol oxidation pathway. This provides important basis for the study of the linkage between xylan and pectin and lignin in plant cell wall by isotopic tracer method. This also contributes to the study of plant fiber chemistry and pulp and paper science.

Key words: myo-inositol, biosynthesis, metabolism pathway, polysaccharides, cell wall

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