Mottiar Yaseen, Mansfield Shawn D
Department of Wood Science, University of British Columbia, Vancouver, BC, Canada.
Front Plant Sci. 2022 Jul 22;13:938083. doi: 10.3389/fpls.2022.938083. eCollection 2022.
The lignin found in the cell walls of poplar fibres is decorated with ester-linked -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 -hydroxybenzoate groups were negatively correlated with syringyl units in a collection of 316 unrelated genotypes of black cottonwood (). Based upon this observation, several alternative hypotheses on the occurrence of lignin acylation are presented.
在杨树纤维细胞壁中发现的木质素带有酯键连接的对羟基苯甲酸部分，这些部分源于酰化单木质醇参与木质素聚合反应。尽管人们对这些细胞壁成分的生物学意义知之甚少，但从历史上看，有人推测酰化单木质醇可能会促进富含紫丁香基木质素的物种（如杨树）的木质化。然而，在316个无关的黑杨基因型群体中，细胞壁结合的对羟基苯甲酸基团与紫丁香基单元呈负相关。基于这一观察结果，提出了几种关于木质素酰化发生的替代假说。
