Document Detail


A comparative analysis of fatty acid composition of root and shoot lipids in Zea mays under copper and cadmium stress.
MedLine Citation:
PMID:  19378928     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A comparative analysis of fatty acid composition was conducted in maize (Zea mays L.) under copper and cadmium stress. The unsaturation level (double-bond index) of phosphatidylethanolamine (PE) and digalactosyldiacylglycerol (DGDG) was increased in response to both metal treatments, whereas the phosphatidylinositol (PI), the phosphatidylcholine (PC) showed no significant changes. The Cu-treated roots showed a marked increase (about 2-fold) in the phospholipid (PL) content, while the Cd-treated roots showed a slight but insignificant increase. The steryl lipid SL/PL ratio was markedly decreased in response to Cu stress, and therefore, may indicate an activated phospholipid biosynthesis and turnover, in response to damage caused by Cu stress. The double bond indices of chloroplastic lipids: phosphatidylglycerol (PG), monogalactosyldiacylglycerol (MGDG), digalactosyldiacylglycerol (DGDG) and sulfoquinovosyldiacylglycerol (SQDG) revealed a similar but not identical pattern of change. The PG and MGDG contents in shoots were markedly decreased under Cu (by 53 and 48%) and Cd (by 78 and 65%) stress. The increase in the malondialdehyde (MDA) content in roots induced by both metals indicates lipid peroxidation. Generally, in the presence of Cu fatty acid composition was markedly modulated but to lesser extent under Cd stress. These results suggest that changes in the fatty acid composition under Cu and Cd stress conditions are metal-specific and may therefore result in differential metal tolerance.
Authors:
R Chaffai; T N Seybou; B Marzouk; E El Ferjani
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta biologica Hungarica     Volume:  60     ISSN:  0236-5383     ISO Abbreviation:  Acta. Biol. Hung.     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-04-21     Completed Date:  2009-05-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8404358     Medline TA:  Acta Biol Hung     Country:  Hungary    
Other Details:
Languages:  eng     Pagination:  109-25     Citation Subset:  IM    
Affiliation:
Department of Biological Sciences, Gafsa Faculty of Sciences, Gafsa University, Zarroug 2112, Gafsa, Tunisia. radhouanec2002@yahoo.fr
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MeSH Terms
Descriptor/Qualifier:
Cadmium / toxicity*
Copper / toxicity*
Fatty Acids / metabolism*
Lipid Peroxidation / drug effects
Plant Roots / drug effects,  metabolism
Plant Shoots / drug effects,  metabolism
Stress, Physiological*
Zea mays / drug effects*,  growth & development,  metabolism
Chemical
Reg. No./Substance:
0/Fatty Acids; 7440-43-9/Cadmium; 7440-50-8/Copper

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


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