PDF(Pubmed)
Abstract：
The lignin found in the cell walls of poplar fibres is decorated with ester-linked p-hydroxybenzoate moieties that originate from the participation of acylated monolignols in lignin polymerisation. Although little is known about the biological implications of these cell-wall constituents, it has historically been postulated that acylated monolignols might promote lignification in syringyl lignin-rich species such as poplar. However, cell-wall-bound p-hydroxybenzoate groups were negatively correlated with syringyl units in a collection of 316 unrelated genotypes of black cottonwood (Populus trichocarpa). Based upon this observation, several alternative hypotheses on the occurrence of lignin acylation are presented.
摘要：
在杨木纤维细胞壁中发现的木质素被酯连接的对羟基苯甲酸酯部分装饰，该部分源自酰化的单木素醇参与木质素聚合。尽管对这些细胞壁成分的生物学意义知之甚少，历史上有人推测，酰化的单木素醇可能会促进富含丁香基木质素的物种如杨树的木质化。然而,在316种无关基因型的黑杨木（Populustrichocarpa）的集合中，细胞壁结合的对羟基苯甲酸酯基团与丁香基单位呈负相关。基于这一观察,提出了几种关于木质素酰化发生的替代假设。
