Factors Controlling the Synthesis of Natural and Induced Lignins in Phleum and Elodea

摘要: Lignin is peculiar to the cell walls of vascular plants, and produced only in specific cells at certain developmental periods. It not detectable aquatic plants such as Elodea, but tisstues these can be induced form lignin-like products if suitable precursors are added (25). Since Elodca were similar those found naturally other monocots Phleum, a comparison metabolism phenolic compounds 2 organisms might aid an understanding factors controlling lignification plants. generally agreed that monomers which polymerized into lignin arise from carbohydrates via shikimic acid pathway (fig 1) (3). Some enzymes involved have been demonstrated free extracts higher (5). Mechanisms effective any point this synthetic pathway. In addition, since probably attached sites wall, number type could factors. Possible regulatory agents terminal step studied celery peas by Siegel et al. (17,18) bamboo Higuchi (10). The agents, indoleacetic (IAA), ascorbic glutathione (GSH), postulated act antioxidants. mechanisms operating earlier level well peroxidation stage investigated study associated with biosynthesis Elodea Phleurn. order eliminate effects treatments on growth bv elongation nonelongating still incompletely lignified tissues chosen.