文献类型：期刊文献

英文题名：Structural characterization of lignins from hydroxycinnamoyl transferase (HCT) down-regulated transgenic poplars

作者：Peng, Xiao-Peng[1,2,3] Sun, Shao-Long[1] Wen, Jia-Long[1] Yin, Wei-Lun[2] Sun, Run-Cang[1]

第一作者：Peng, Xiao-Peng

通信作者：Wen, JL[1]

机构：[1]Beijing Forestry Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China;[2]Beijing Forestry Univ, Coll Biol Sci & Biotechnol, Natl Engn Lab Tree Breeding, Beijing 100083, Peoples R China;[3]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China

年份：2014

卷号：134

起止页码：485-492

外文期刊名：FUEL

收录：;EI(收录号：20142717901747);Scopus(收录号：2-s2.0-84903463555);WOS:【SCI-EXPANDED(收录号:WOS:000340304100058)】；

基金：This work was supported by the grants from the National Natural Science Foundation of China (31110103902), Major State Basic Research Projects of China (973-2010CB732204).

语种：英文

外文关键词：HCT poplar; 2D-HSQC NMR; S/G ratio; p-Hydroxybenzoate (PB)

摘要：Detailed structural features of lignin from hydroxycinnamoyl transferase (HCT) down-regulated poplar has not been thoroughly illustrated. In the present study, MWL and CEL samples were successively extracted with higher yield and purity. NMR spectra demonstrated that the MWL and CEL presented similar structural features (beta-O-4', beta-beta', beta-5', and beta-1', although the subsequent CEL had a high beta-O-4' linkages content and S/G ratios, which are also related to their molecular weights. There were no significant differences in S/G ratio and the distribution of the inter-unit linkages between the control and HCT down-regulated poplar (HCT poplar). However, a minor amount of H units were detected in lignin of the HCT poplar. In addition, p-hydroxybenzoate (PB) content was observably increased in the lignin from the HCT poplar. These findings are of very importance in assessing of the digestibility of HCT down-regulated poplar in the fuel production. (C) 2014 Elsevier Ltd. All rights reserved.