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Journal of Agronomy
Year: 2005  |  Volume: 4  |  Issue: 1  |  Page No.: 67 - 74

Aluminum Toxicity in Maize Seedlings (Zea mays L.): Effect on Growth and Lipid Content

Radhouane Chaffai, Ali Tekitek and Ezzedine El Ferjani    

Abstract: Maize seedlings were grown in hydroponic nutrient solutions containing 0, 20, 50, 100, 250, 500 and 1000 μM Al(NO3)3.9H2O. The effect of aluminum on growth parameters and lipid composition of maize organs are studied. The results showed that Al inhibited dramatically root growth. Morphological symptoms characteristic of Al toxicity were observed in roots. The Al reduced significantly the fresh and dry matter production. Analyze of the lipid content showed a decrease in phospholipids in roots and shoots particularly at 1000 μM. Moreover, Al affected glycolipids in roots without any changes in shoots. The steryl lipids did not undergo variations. The increase of SL/PL ratio in roots and shoots point out elevated lipid membrane fluidity under Al stress. All the changes in lipid content were essential to restore optimal membrane properties for continuous growth under Al stress.

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