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  

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

作　　者：张梦[1] 谢益民[1] 杨海涛[1] 姚兰[1] 

机构地区：[1]湖北工业大学制浆造纸工程学院,湖北武汉430068

出　　处：《林产化学与工业》2013年第5期106-114,共9页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(31070521;30901140)

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。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-l- 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.

关 键 词：肌肉肌醇 生物合成 代谢途径 多糖 细胞壁 

分 类 号：TQ351[化学工程]