| Lipid composition and fluidity of plasma membranes isolated from corn (Zea mays L.) roots. | |
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MedLine Citation:
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PMID: 11368181 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Although the results of lipid analyses from several plant species have been available for many years a complete characterization of the corn root plasma membrane is still lacking. The present study provides a detailed analysis of individual lipids and a characterization of the membrane fluidity of corn (Zea mays L.) root plasma membranes isolated by phase-partitioning. Phospholipids (43.9 mol%), sterols (40.8 mol%), and sphingolipids in the form of glucocerebroside (6.8 mol%) constitute the major lipid classes. Stigmasterol (19.8 mol%), campesterol (13.0 mol%), phosphatidylcholine 15.8 mol%), and phosphatidylethanolamine (14.2 mol%) represent the most ubiquitous individual lipids. Hydroxy fatty acids make up 80.9 mol% and very long chain fatty acids are almost 78% of fatty acids in glucocerebroside. Hydroxy arachidic acid (20:0 h) and hydroxy lignoceric acid (24:0 h) are most prominent and glucocerebroside from corn root plasma membranes contains virtually no unsaturated fatty acids. Among the phospholipids only phosphatidylserine displayed a high proportion of very long chain fatty acids (e.g., behenic and lignoceric acid). Membrane fluidity was estimated by fluorescence anisotropy. Due to the high sterol content the plasma membrane of corn roots is relatively rigid. |
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Authors:
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M Bohn; E Heinz; S Lüthje |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Archives of biochemistry and biophysics Volume: 387 ISSN: 0003-9861 ISO Abbreviation: Arch. Biochem. Biophys. Publication Date: 2001 Mar |
Date Detail:
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Created Date: 2001-05-22 Completed Date: 2001-06-14 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0372430 Medline TA: Arch Biochem Biophys Country: United States |
Other Details:
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Languages: eng Pagination: 35-40 Citation Subset: IM |
Affiliation:
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Institut für Allgemeine Botanik, Universität Hamburg, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cell Fractionation Cell Membrane / chemistry* Fatty Acids / analysis Glucosylceramides / analysis Lipids / chemistry* Membrane Fluidity* Phospholipids / analysis Plant Roots / chemistry* Sterols / analysis Subcellular Fractions / chemistry Zea mays |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids; 0/Glucosylceramides; 0/Lipids; 0/Phospholipids; 0/Sterols |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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