منابع مشابه
Macromolecular replication during lignin biosynthesis.
Lignins play a crucial role in the cell-wall architecture of all vascular plants. They are composed of p-hydroxyphenylpropanoid units interconnected through covalent bonds formed during lignol radical coupling between six different pairs of atomic centers. For 50years, the primary structures of lignins have been thought to be random, but for a number of reasons such an assumption is not tenable...
متن کاملMathematical models of lignin biosynthesis
Background Lignin is a natural polymer that is interwoven with cellulose and hemicellulose within plant cell walls. Due to this molecular arrangement, lignin is a major contributor to the recalcitrance of plant materials with respect to the extraction of sugars and their fermentation into ethanol, butanol, and other potential bioenergy crops. The lignin biosynthetic pathway is similar, but not ...
متن کاملDual methylation pathways in lignin biosynthesis
Caffeoyl-coenzyme A (CoA) O-methyltransferase (CCoAOMT) has been proposed to be involved in an alternative methylation pathway of lignin biosynthesis. However, no direct evidence has been available to confirm that CCoAOMT is essential for lignin biosynthesis. To understand further the methylation steps in lignin biosynthesis, we used an antisense approach to alter O-methyltransferase (OMT) gene...
متن کاملThe origin and evolution of lignin biosynthesis.
SUMMARY Lignin, a phenolic polymer derived mainly from hydroxycinnamyl alcohols, is ubiquitously present in tracheophytes. The development of lignin biosynthesis has been considered to be one of the key factors that allowed land plants to flourish in terrestrial ecosystems. Lignin provides structural rigidity for tracheophytes to stand upright, and strengthens the cell wall of their water-condu...
متن کاملRoles of lignin biosynthesis and regulatory genes in plant development
Lignin is an important factor affecting agricultural traits, biofuel production, and the pulping industry. Most lignin biosynthesis genes and their regulatory genes are expressed mainly in the vascular bundles of stems and leaves, preferentially in tissues undergoing lignification. Other genes are poorly expressed during normal stages of development, but are strongly induced by abiotic or bioti...
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ژورنال
عنوان ژورنال: The Plant Cell
سال: 1995
ISSN: 1040-4651,1532-298X
DOI: 10.1105/tpc.7.7.1001