Document Detail


Relationship of growth cessation with the formation of diferulate cross-links and p-coumaroylated lignins in tall fescue leaf blades.
MedLine Citation:
PMID:  12244444     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We examined relationships among cell wall feruloylation, diferulate cross-linking, p-coumarate deposition, and apoplastic peroxidase (EC 1.11.1.7) activity with changes in the elongation rate of leaf blades of slow and rapid elongating genotypes of tall fescue ( Festuca arundinacea Schreb.). Growth was not directly influenced by ferulic acid deposition but leaf elongation decelerated as 8-5-, 8- O-4-, 8-8-, and 5-5-coupled diferulic acids accumulated in cell walls. Growth rapidly slowed and stopped with the deposition of p-coumarate, which is primarily associated with lignification in grass cell walls. Accretion of ferulate, diferulates and p-coumarate continued after growth ended, into the later stages of secondary wall formation. The concentration of 8-coupled diferulates dwarfed that of the more commonly measured 5-5-coupled isomer, suggesting that the latter dimer is a poor indicator of diferulate cross-linking in cell walls. Further work is required to clearly demonstrate the role of diferulate cross-linking and p-coumaroylated lignins in the cessation of leaf growth in grasses.
Authors:
Jennifer W MacAdam; John H Grabber
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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:  2002-06-14
Journal Detail:
Title:  Planta     Volume:  215     ISSN:  0032-0935     ISO Abbreviation:  Planta     Publication Date:  2002 Sep 
Date Detail:
Created Date:  2002-09-23     Completed Date:  2002-12-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  1250576     Medline TA:  Planta     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  785-93     Citation Subset:  IM    
Affiliation:
Department of Plants, Soils, and Biometeorology, Utah State University, Logan 84322-4820, USA. jenmac@cc.usu.edu
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MeSH Terms
Descriptor/Qualifier:
Cell Wall / enzymology,  metabolism
Coumaric Acids / metabolism*
Festuca / genetics,  growth & development*,  metabolism
Genotype
Lignin / metabolism*
Peroxidase / metabolism
Plant Epidermis / growth & development,  metabolism
Plant Leaves / enzymology,  growth & development*,  metabolism
Chemical
Reg. No./Substance:
0/Coumaric Acids; 1135-24-6/ferulic acid; 7400-08-0/4-coumaric acid; 9005-53-2/Lignin; EC 1.11.1.7/Peroxidase

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


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