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Asian Journal of Plant Sciences
Year: 2003  |  Volume: 2  |  Issue: 15  |  Page No.: 1121 - 1125

Influence of Hydrogen Peroxide on Initial Leaf and Coleoptile Growth in Etiolated Wheat (Triticum aestivum L) Seedlings

Amjad Hameed, Salman Akbar Malik, Nayyer Iqbal, Rubina Arshad and Shafqat Farooq    

Abstract: Influence of oxidative stress induced by exogenous application of hydrogen peroxide on initial leaf and coleoptile growth in etiolated wheat seedlings was studied. Leaf and coleoptile growth parameters (mean fresh weight and length) showed a transient stress effect during very initial age, becoming non-significant (P>0.05) in later age (8th day). Mean leaf fresh weight increased steadily after 5th day in both stressed and control seedlings, however the magnitude was lower in stressed seedlings and the difference was non-significant (p>0.05). Mean coleoptile fresh weight was significantly (p<0.01) lower in stressed seedlings on all days except on 6th and 8th day where the difference was non-significant (p>0.05). Mean leaf and coleoptile length were significantly (p<0.01) lower in stressed seedlings during 5 to 7th day, however the difference was non-significant (p>0.05) on 8th day. Stress effect was more pronounced on 5th day in case of leaf and coleoptile length and coleoptile fresh weight. Collectively oxidative stress induced by exogenous application of hydrogen peroxide induces a transient and finally a non-significant effect on initial leaf and coleoptile growth, which indicated the adaptation of seedlings to applied stress.

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