منابع مشابه
Order and Randomness in Lignin and Lignification: Is a New Paradigm for Lignification Required?
to say that other aspects of order in the polymer, such as the alignment of aromatic rings indicated by Raman spectroscopy (Atalla and Agarwal 1985), are impossible. Randomness has been used to imply that the process appeared to have no direct enzymatic control. Obviously, the polymerization of lignin is not completely random, and only a subset of the possible linkages are found. In fact, prior...
متن کاملVariations in Lignin: What do Recent Studies on Lignin-Biosynthetic-Pathway Mutants and Transgenics Reveal about Lignification?
traditional paradigm for lignification. Our view is in sharp contrast with a recent model of lignin biosynthesis requiring template dependent stereospecific control of lignin polymerization (Lewis and Davin 1998, Davin et al. 1997) [see p. 33]. Structural information has long been used to guide the search for underlying mechanisms for important biological processes, and the biosynthesis of lign...
متن کاملDeciphering the enigma of lignification: precursor transport, oxidation, and the topochemistry of lignin assembly.
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 a...
متن کاملUpdate on Lignification Lignin Formation in Plants. The Dilemma of Linkage Specificity
Lignification is the process of forming the collective of phenylpropanoid macromolecules termed lignin. There are two ways to define lignin: 1) from a chemical point of view (i.e. its chemical composition and structure), and 2) from a functional view that stresses what lignin does within the plant. It has been recognized for 50 years now that lignin is a polymeric material composed of phenylpro...
متن کاملLignification in sugarcane: biochemical characterization, gene discovery, and expression analysis in two genotypes contrasting for lignin content.
Sugarcane (Saccharum spp.) is currently one of the most efficient crops in the production of first-generation biofuels. However, the bagasse represents an additional abundant lignocellulosic resource that has the potential to increase the ethanol production per plant. To achieve a more efficient conversion of bagasse into ethanol, a better understanding of the main factors affecting biomass rec...
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ژورنال
عنوان ژورنال: Journal of the agricultural chemical society of Japan
سال: 1957
ISSN: 0002-1407,1883-6844
DOI: 10.1271/nogeikagaku1924.31.6_380