Growth-Related Esterification of Plant Cell Wall Pectins

果胶是细胞壁的主要结构多糖 在高等植物中存在，并且非常复杂。 他们有 被认为在生物学中扮演着多重角色 与细胞壁水合作用、可塑性和 细胞粘附 果胶似乎也参与了植物 防御反应。 这个项目将研究一些 果胶化学结构的详细修饰， 发生在细胞生长过程中。 要特别注意的是， 用于糖醛酸酯化的特定类型 玉米细胞中的残留物以及随着细胞的生长 成长 有证据表明酯化的半乳糖醛酸 甲基酯不能完全解释这些单元 导致需要进一步的工作，以更充分地表征 这些酯化的化合物。 该项目旨在 阐明酯化的细节以及它们之间的关系 果胶与多糖的相互作用 与细胞增大有关的肿瘤。 高等植物的细胞壁主要负责 植物的支持，是一个主要的决定因素， 植物 植物细胞壁由许多复杂的 聚合碳水化合物，包括纤维素、半纤维素 和果胶化合物。 果胶化合物是聚合物 由一系列糖酸组成的化合物， 以复杂的模式连接在一起。 这些果胶化合物 在它们的化学结构中发生微妙的变化， 增长，这些变化可能会发挥重要作用 决定了植物细胞的大小。 在 这个项目卡皮塔博士继续他的详细探索 玉米果胶的化学性质， 最先进的技术在充分表征这些重要的 复合物。*/

Pectins are major structural polysaccharides of the cell wall in higher plants and are of enormous complexity. They have been thought to play a multiplicity of roles in the biology of the cell in connection with wall hydration, plasticity and cell adhesion. Pectins also appear to be involved in plant defense responses. This project will examine some of the detailed modifications in chemical structure of pectins that take place during cell growth. Particular attention is to be paid to the specific type of esterification of uronic acid residues in maize cells and how this changes as the cells grow. Evidence that the esterified galactosyluronic acid units cannot be completely accounted for by methyl esters leads to the need for further work to characterize more fully these esterified compounds. This project is intended to elucidate details of esterification and how thesse may relate to polysaccharide interactions resulting from the pectin esterifications that are associated with cell enlargement. The cell wall of higher plants is largely responsible for the support of plants and is a major determinant of the form of plants. Plant cell walls comprise of a number of complex polymeric carbohydrates, including cellulose, hemicellulose and pectic compounds. Pectic compounds are polymeric compounds consisting of a series of sugar-acids that are linked together in complex patterns. These pectic compounds undergo subtle changes in their chemical structure during growth, and these changes may play an important role in determining how plant cells are able to grow in size. In this project Dr. Carpita continues his detailed exploration of the chemistry of maize pectins, making use of state-of- the-art technology in fully characterizing these important compounds.***//