Monolignol

Monolignol
Structures of the three commonly occurring monolignols

Monolignols are phytochemicals acting as source materials for biosynthesis of both lignans and lignin. The starting material for production of monolignols is the amino acid phenylalanine. The first reactions in the biosynthesis are shared with the phenylpropanoid pathway, and monolignols are considered to be a part of this group of compounds. There are three main monolignols: coniferyl alcohol, sinapyl alcohol and paracoumaryl alcohol. Different plants use different monolignols. For example, Norway spruce lignin is almost entirely coniferyl alcohol while paracoumaryl alcohol is found almost exclusively in grasses.

Monolignols are synthetised in the cytosol as glucosides. The glucose is added to the monolignol to make them water soluble and to reduce their toxicity. The glucosides are transported through the cell membrane to the apoplast. The glucose is then removed and the monolignols are polymerised into lignin.

The phenylpropenes are derived from the monolignols.


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Monolignol — Structure des trois monolignols les plus courants Les monolignols sont des composés phytochimiques servant de source pour la biosynthèse de lignanes (composé de deux unités de monolignol) et lignines (polymère de monolignol) . Sommaire …   Wikipédia en Français

  • monolignol — noun Any of a class of phenolic alcohols, found in plants, that take part in the biosynthesis of lignans and lignin …   Wiktionary

  • Lignin — or lignen is a complex chemical compound most commonly derived from wood and an integral part of the secondary cell walls of plants.cite encyclopedia |last=Lebo |first=Stuart E. Jr. |author= |authorlink= |coauthors=Gargulak, Jerry D. and McNally …   Wikipedia

  • 458-35-5 — Alcool coniférylique Alcool coniférylique Général …   Wikipédia en Français

  • Alcool coniférylique — Général Nom IUPAC alcool 4 hydroxy 3 méthoxycinnamylique No CAS …   Wikipédia en Français

  • Lignifier — Lignine Structure possible d’une lignine …   Wikipédia en Français

  • List of gene families — This is a list of gene families or gene complexes, that is sets of genes which occur across a number of different species which often serve similar biological functions. These gene families typically encode functionally related proteins, and… …   Wikipedia

  • Phenylpropanoid — Phenylpropanoids are a class of plant derived organic compounds that are biosynthesized from the amino acid phenylalanine. They have a wide variety of functions, including defense against herbivores, microbial attack, or other sources of injury;… …   Wikipedia

  • Sinapyl alcohol — Chembox new ImageFile = Sinapyl alcohol.png ImageSize = 250px IUPACName = 4 hydroxy 3,5 dimethoxycinnamyl alcohol OtherNames = sinapoyl alcohol, 4 (3 hydroxy 1 propenyl) 2,6 dimethoxy phenol Section1 = Chembox Identifiers CASNo = 537 33 7 PubChem …   Wikipedia

  • Coniferin — IUPAC name (2R,3S,4S,5R,6S) 2 (Hydroxymethyl) 6 [4 [(E) 3 hydroxyprop 1 …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”