木质素生物合成途径及调控的研究进展

木质素是植物体中仅次于纤维素的一种重要大分子有机物质，具重要生物学功能。木质素填充于纤维素构架中增强植物体的机械强度，利于疏导组织的水分运输和抵抗不良外界环境的侵袭。陆生植物的木质素合成是适应陆地环境的重要进化特征之一。然而，制浆造纸的中心环节是用大量化学品将原料中的木质素与纤维素分离，纤维素用于造纸，分离的木质素等成为造纸工业的主要废弃物，对江河湖海的污染触目惊心。脱木质素的化学品投入及废液的碱回收处理需大量耗能并增加造纸成本。饲草的木质素还影响牲畜的消化与营养吸收，木质素含量的高低是饲草优劣…

Recent Advances in Study of Lignin Biosynthesis and Manipulation

Lignin with important biological functions is the second abundant natural product, its content is only less than cellulose in plant. But the lignin must be extracted from the cellulose fraction in making paper pulp process leading energy_requiring, cost_increasing and pollution. Also, the lignin has negative effect on the digestibility of silage grass. So it is of considerable interest to reduce the lignin content in resource plants. The paper reviews the progress of lignin biosynthesis and regulation. The feasibility of reducing the lignin content and altering its composition for improving paper pulp production and decreasing pollution are discussed.