Molecular Structure of Plant Cuticle Polyesters

木栓质和木栓质是植物角质层的结构聚合物， 作为环境的保护屏障， 在不同的植物器官中。 虽然这些生物聚酯是 由已知的脂肪酸成分组成，它们的不溶性 阻碍了对单体单元如何连接的研究 在化学上。 一些新的研究策略是 本文提出：（1）~（13）C NMR谱和自旋弛豫研究 （交叉极化和魔角直接采集） 旋转），以评估角质弹性， （2）13C和2H NMR研究 角质-蜡和角质-水混合物中的分子相互作用;（3） 角质低聚物的制备和光谱鉴定 和来自选择性解聚处理的残余物;（4）13C 化学键和聚合物-聚合物相互作用的NMR研究 在木栓质细胞壁组装中。 通过这种协调一致的方法 植物角质层超分子结构解析 聚酯，应该有可能测试现有的假设， 发展关于它们在作物中的作用的新的机理思想 保护、植物发展和牲畜营养。

Cutin and suberin are the structural polymers of plant cuticle, functioning as protective barriers to the environment and also among various plant organs. Although these biopolyesters are composed of known fatty acid constituents, their insolubility has hampered investigations of how the monomer units are linked together chemically. Several new research strategies are proposed herein: (1) 13C NMR spectra and spin relaxation studies (cross-polarization and direct acquisition with magic-angle spinning) of intact cutin to assess cuticular resiliency at extremes of temperature; (2) 13C and 2H NMR investigations of molecular interactions in cutin-wax and cutin-water mixtures; (3) production and spectroscopic identification of cutin oligomers and residues from selective depolymerization treatments; (4) 13C NMR studies of chemical bonding and polymer-polymer interactions in suberin-cell wall assemblies. With this coordinated approach to supramoleclar structure elucidation in plant cuticle polyesters, it should be possible to test existing hypotheses and develop new mechanistic ideas regarding their function in crop protection, plant development, and livestock nutrition.