Document Detail

Isolation, identification and quantitation of hydroxycinnamic acid conjugates, potential platform chemicals, in the leaves and stems of Miscanthus × giganteus using LC-ESI-MSn.
MedLine Citation:
PMID:  21899864     Owner:  NLM     Status:  MEDLINE    
Miscanthus×giganteus is a source of platform chemicals and bioethanol through fermentation. Cinnamates in leaves and stems were analysed by LC-ESI-MS(n). Free phenols were extracted and separated chromatographically. More than 20 hydroxycinnamates were identified by UV and LC-ESI-MS(n). Comparative LC-MS studies on the leaf extract showed isomers of O-caffeoylquinic acid (3-CQA, 4-CQA and 5-CQA), O-feruloylquinic acid (3-FQA, 4-FQA and 5-FQA) and para-coumaroylquinic acid (3-pCoQA and 5-pCoQA). Excepting 3-pCoQA, all were also detected in stem. 5-CQA dominated in leaf; a mandelonitrile-caffeoylquinic acid dominated in stem. Three minor leaf components were distinguished by fragmentation patterns in a targetted MS(2) experiment as dicaffeoylquinic acid isomers. Others (M(r) 516) were tentatively identified as hexosylcaffeoyl-quinates. Three positional isomers of O-caffeoylshikimic acid were minor components. p-Hydroxybenzaldehyde was also a major component in stem. This is the first report of the hydroxycinnamic acid profile of leaves and stems of M.×giganteus.
Ifat Parveen; Michael D Threadgill; Barbara Hauck; Iain Donnison; Ana Winters
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-09-06
Journal Detail:
Title:  Phytochemistry     Volume:  72     ISSN:  1873-3700     ISO Abbreviation:  Phytochemistry     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-10-24     Completed Date:  2012-08-10     Revised Date:  2014-10-14    
Medline Journal Info:
Nlm Unique ID:  0151434     Medline TA:  Phytochemistry     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2376-84     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
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MeSH Terms
Chemical Fractionation
Chromatography, Liquid
Coumaric Acids / chemistry*,  isolation & purification,  metabolism
Hybridization, Genetic
Phenols / chemistry,  isolation & purification
Plant Leaves / chemistry
Plant Stems / chemistry
Poaceae / chemistry*
Spectrometry, Mass, Electrospray Ionization
Grant Support
BBS/E/W/00003134D//Biotechnology and Biological Sciences Research Council; //Biotechnology and Biological Sciences Research Council
Reg. No./Substance:
0/Coumaric Acids; 0/Phenols

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

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