Suberin Structure in Potato Periderm: Glycerol, Long-Chain Monomers, and Glyceryl and Feruloyl Dimers
作者:José Graça、Helena Pereira
DOI:10.1021/jf0006123
日期:2000.11.1
aliphatics. GC-MS analysis showed the presence of monomers, dimers, and trimers (87, 12, and 1% of identified compounds, respectively). A total of 26 dimers were identified by EIMS: monoacylglyceryl esters of alpha,omega-diacids, omega-hydroxyacids, and alkanoic acids (with predominance of the 1- and 2-isomers of the monoacylglyceryl ester of the octadec-9-enodioic acid), as well as feruloyl esters of omega-hydroxyacids
在无提取物马铃薯皮层中的Suberin约占NaOCH(3)甲醇分解测定的25%。单体成分的特征是甘油(占单体的20%),长链α,ω-二酸,ω-羟基酸,链烷酸和alkan-1-ols,主要为十八烷基-9-烯二酸和18-羟基十八烷基- 9-烯酸(分别占长链单体的39%和15%)。还存在芳族羟基肉桂基单体(<1%)。使用Ca(OH)(2)催化的甲醇分解作用对马铃薯皮层素木素进行部分解聚可溶解约10%的木脂素脂族化合物。GC-MS分析表明存在单体,二聚体和三聚体(分别为所鉴定化合物的87%,12%和1%)。通过EIMS识别出总共26个二聚体:α,ω-二酸,ω-羟酸的单酰基甘油酯,和链烷酸(以十八烷基9-烯二酸的单酰基甘油酯的1和2异构体为主),以及ω-羟基酸和alkan-1-ol的阿魏酸酯和少量的单铁酰甘油。在讨论了木质素大分子结构之后,提出了在具有亚醇的细胞壁中,多脂族聚合物具有由甘油确保的三维