| Phospholipids and their fatty acids in infective juveniles of entomopathogenic steinernematid nematodes. | |
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MedLine Citation:
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PMID: 9467876 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The composition of phospholipids and their fatty acids was investigated in the infective juveniles (IJs) of four species of entomopathogenic nematodes: Steinernema carpocapsae (strain All), S. riobravis (strain Biosys 355), S. feltiae (strain UK76) and S. glaseri (strain NC). In newly emerged IJs of the four species, phospholipids comprised 15-18% dry weight of the total lipids (or 5-6% dry weight of the nematode), and phosphatidylethanolamine and phosphatidylcholine constituted about 40 and 30%, respectively, of the total phospholipids, with phosphatidylserine (PS) and phosphatidylinositol (PI) collectively accounting for about 25%. Qualitatively, the four species had identical total phospholipid (combined non-acidic and acidic fractions) fatty acid profiles, although there were some differences in the relative proportions (mol%) of specific fatty acids. The fatty acid composition of the total phospholipids in newly emerged IJs was dominated by C16 fatty acids, specifically C16:0 (14-18%), C16:1n-7 (up to 20%) and C16:4 (up to 26%), whereas the major C18 fatty acid was C18:1n-9 (20-23%). Polyunsaturated C20 fatty acids collectively made up 8-13% of the total composition. When newly emerged IJs were stored in distilled water at 25 degrees C, the proportions of C16:0 and C16:4 decreased with storage time, whereas C16:3n-3 increased (by 30-fold in S. glaseri). These changes were mostly observed in the acidic phospholipid fraction (mainly PI and PS). No evidence was found for a correlation between the fatty acid composition of the phospholipids and the relative ability of the IJs of the four Steinernema species to survive desiccation stress. |
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Authors:
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M N Patel; D J Wright |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology Volume: 118 ISSN: 1096-4959 ISO Abbreviation: Comp. Biochem. Physiol. B, Biochem. Mol. Biol. Publication Date: 1997 Nov |
Date Detail:
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Created Date: 1998-03-11 Completed Date: 1998-03-11 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9516061 Medline TA: Comp Biochem Physiol B Biochem Mol Biol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 649-57 Citation Subset: IM |
Affiliation:
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Department of Biology, Imperial College of Science, Technology and Medicine, Ascot, Berkshire, U.K. m.n.patel@bio.ic.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Desiccation Fatty Acids / analysis* Phospholipids / analysis, chemistry* Rhabditoidea / growth & development, physiology* |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids; 0/Phospholipids |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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