Mobilisation of storage cell wall polysaccharides in seeds
Mobilisation of storage cell wall polysaccharides in seeds
复制标题
DOI：
10.1016/s0981-9428(00)00162-5
复制
发表时间：
2000-01-01
影响因子：
6.5
通讯作者：
Tiné, MAS
中科院分区：
文献类型：
--
作者：
Buckeridge, MS;dos Santos, HP;Tiné, MAS
植物以多种形式储存碳水化合物聚合物。淀粉是主要形式，其次是果聚糖和细胞壁贮藏多糖（CWSP）。后者主要存在于种子中，并且由存在于细胞壁基质之一中的多糖之一的放大组成。CWSP被分类为甘露聚糖、木葡聚糖和半乳聚糖，第一种被细分为纯甘露聚糖、半乳甘露聚糖和葡甘露聚糖。本文综述了种子贮藏细胞壁多糖的发生、结构、代谢及其生理生态意义，重点介绍了种子贮藏细胞壁多糖在植物进化过程中对代谢和环境适应的重要性。CWSPs作为贮藏多糖的特性与淀粉和果聚糖进行了比较，并对甘露聚糖/半乳甘露聚糖、木葡聚糖和半乳聚糖的催化剂（包括控制）的现有知识进行了综述。在这些数据的基础上，提出的想法，CWSPs是多功能的分子，这一功能被用来作为证据的假设，在进化过程中，CWSPs参与了循环的功能转移，导致他们成为存储多糖，但保留了一些他们以前的主要细胞壁功能。(C)2000年，Elsevier SAS科学与医学版。
Plants store carbohydrate polymers in a number of forms. Starch is the principal form, followed by fructans and cell wall storage polysaccharides (CWSP). The latter are present mainly in seeds and consist of magnifications of one of the polysaccharides present in one of the cell wall matrices. CWSPs are classified as mannans, xyloglucans and galactans, the first being subdivided into pure mannans, galactomannans and glucomannans. The present review updates the principal discoveries concerning occurrence, structure, metabolism and eco-physiological significance of the seed storage cell wall polysaccharides with emphasis on their importance for plant metabolism and adaptation to their respective environments during evolution. The properties of CWSPs as storage polysaccharides are compared with starch and fructans and the current knowledge on the catabolism (including control) of mannan/galactomannan, xyloglucan, and galactan is reviewed. On the basis of these data, the idea that the CWSPs are multifunctional molecules is proposed and this feature is used as evidence for the hypothesis that, during evolution, the CWSPs were involved in cycles of transference of functions which led them to become storage polysaccharides, yet preserving some of their previous primary cell wall functions. (C) 2000 Editions scientifiques et medicales Elsevier SAS.