Deciphering the Enigma of Lignification： Precursor Transport, Oxidation, and the Topochemistry of Lignin Assembly  

作　　者：Chang-Jun Liu 

机构地区：[1]Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA

出　　处：《Molecular Plant》2012年第2期304-317,共14页分子植物（英文版）

基　　金：This work was supported by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences of the US Department of Energy through Grant DEAC0298CH10886; the National Science Foundation through grant MCB-1051675; the Laboratory Directed Research and Development Program of Brookhaven National Laboratory （No 11-007）; the CAS/SAFEA International Partnership Program for Creative Research Teams in Plant Metabolisms, and the National Science Foundation of China for Oversea Distin- guished Young Scholars （31028003）. No conflict of interest declared.

摘　　要：Plant lignification is a tightly regulated complex cellular process that occurs via three sequential steps： the synthesis of monolignols within the cytosol; the transport of monomeric precursors across plasma membrane; and the oxidative polymerization of monolignols to form lignin macromolecules within the cell wall. Although we have a reasonable understanding of monolignol biosynthesis, many aspects of lignin assembly remain elusive. These include the pre- cursors＇ transport and oxidation, and the initiation of lignin polymerization. This review describes our current knowledge of the molecular mechanisms underlying monolignol transport and oxidation, discusses the intriguing yet least- understood aspects of lignin assembly, and highlights the technologies potentially aiding in clarifying the enigma of plant lignification.Plant lignification is a tightly regulated complex cellular process that occurs via three sequential steps： the synthesis of monolignols within the cytosol; the transport of monomeric precursors across plasma membrane; and the oxidative polymerization of monolignols to form lignin macromolecules within the cell wall. Although we have a reasonable understanding of monolignol biosynthesis, many aspects of lignin assembly remain elusive. These include the pre- cursors＇ transport and oxidation, and the initiation of lignin polymerization. This review describes our current knowledge of the molecular mechanisms underlying monolignol transport and oxidation, discusses the intriguing yet least- understood aspects of lignin assembly, and highlights the technologies potentially aiding in clarifying the enigma of plant lignification.

关 键 词：LIGNIFICATION monolignol transport ABC transporter LACCASE peroxidase. 

分 类 号：Q255[生物学—细胞生物学] U491[交通运输工程—交通运输规划与管理]