| Isolation, identification and quantitation of hydroxycinnamic acid conjugates, potential platform chemicals, in the leaves and stems of Miscanthus×giganteus using LC-ESI-MS(n). | |
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MedLine Citation:
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PMID: 21899864 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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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. |
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Authors:
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Ifat Parveen; Michael D Threadgill; Barbara Hauck; Iain Donnison; Ana Winters |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-5 |
Journal Detail:
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Title: Phytochemistry Volume: - ISSN: 1873-3700 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-8 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0151434 Medline TA: Phytochemistry Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Gogerddan, Aberystwyth SY23 3EB, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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