Document Detail


Compositional characterization and imaging of "wall-bound" acylesters of Populus trichocarpa reveal differential accumulation of acyl molecules in normal and reactive woods.
MedLine Citation:
PMID:  18820945     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Acylesterification is one of the common modifications of cell wall non-cellulosic polysaccharides and/or lignin primarily in monocot plants. We analyzed the cell-wall acylesters of black cottonwood (Populus trichocarpa Torr. & Gray) with liquid chromatography-mass spectrometry (LC-MS), Fourier transform-infrared (FT-IR) microspectroscopy, and synchrotron infrared (IR) imaging facility. The results revealed that the cell wall of dicotyledonous poplar, as the walls of many monocot grasses, contains a considerable amount of acylesters, primarily acetyl and p-hydroxycinnamoyl molecules. The "wall-bound" acetate and phenolics display a distinct tissue specific-, bending stress responsible- and developmental-accumulation pattern. The "wall-bound" p-coumarate predominantly accumulated in young leaves and decreased in mature leaves, whereas acetate and ferulate mostly amassed in the cell wall of stems. Along the development of stem, the level of the "wall-bound" ferulate gradually increased, while the basal level of p-coumarate further decreased. Induction of tension wood decreased the accumulation of the "wall-bound" phenolics while the level of acetate remained constant. Synchrotron IR-mediated chemical compositional imaging revealed a close spatial distribution of acylesters with cell wall polysaccharides in poplar stem. These results indicate that different "wall-bound" acylesters play distinct roles in poplar cell wall structural construction and/or metabolism of cell wall matrix components.
Authors:
Jin-Ying Gou; Simone Park; Xiao-Hong Yu; Lisa M Miller; Chang-Jun Liu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-09-27
Journal Detail:
Title:  Planta     Volume:  229     ISSN:  0032-0935     ISO Abbreviation:  Planta     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-21     Completed Date:  2009-04-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1250576     Medline TA:  Planta     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  15-24     Citation Subset:  IM    
Affiliation:
Department of Biology, Brookhaven National Laboratory, Upton, NY 11973, USA.
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MeSH Terms
Descriptor/Qualifier:
Acylation
Cell Wall / chemistry*
Coumaric Acids / analysis
Esters / analysis*
Lignin / metabolism
Organ Specificity
Populus / chemistry*
Spectrometry, Mass, Electrospray Ionization
Spectroscopy, Fourier Transform Infrared
Wood / metabolism*
Chemical
Reg. No./Substance:
0/Coumaric Acids; 0/Esters; 11132-73-3/lignocellulose; 1135-24-6/ferulic acid; 9005-53-2/Lignin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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