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International Journal of Agricultural Research
  Year: 2007 | Volume: 2 | Issue: 2 | Page No.: 126-135
DOI: 10.3923/ijar.2007.126.135
 
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Changes in Polar Lipid Composition in Maize Seedlings Induced by Cadmium Stress
Radhouane Chaffai, Mohamed Anis Elhammadi , Tini Nouhou Seybou , Ali Tekitek , Brahim Marzouk and Ezzedine El Ferjani

Abstract:
The fatty acid composition and the polar lipid profiles are examined in maize (Zea mays L., cv. Alistrong) treated with 100 μM Cd. In roots, analysis of fatty acid composition reveals a general pattern of increase in the unsaturation level of most polar lipid classes, as indicated by the Double Bond Index (DBI). The results also include no alteration of total fatty acid, phospholipid (PL) and Steryl Lipid (SL) contents, but glycolipids (GL) were substantially increased. In shoots, the double bond indices of phosphatidylcholine (PC) and phosphatidylglycerol (PG) were decreased, whereas those obtained from MGDG, DGDG and SQDG showed an opposite response. The PG and MGDG content in shoots were markedly decreased by about 78 and 65%, respectively, indicating that the Cd toxicity caused severe damage to the structure and function of photosynthetic membranes. The increase of the malondialdehyde (MDA) content in roots indicates an oxidative stress, which can be involved in mediating compositional membrane alterations.
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How to cite this article:

Radhouane Chaffai, Mohamed Anis Elhammadi , Tini Nouhou Seybou , Ali Tekitek , Brahim Marzouk and Ezzedine El Ferjani , 2007. Changes in Polar Lipid Composition in Maize Seedlings Induced by Cadmium Stress . International Journal of Agricultural Research, 2: 126-135.

DOI: 10.3923/ijar.2007.126.135

URL: https://scialert.net/abstract/?doi=ijar.2007.126.135

 
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