Influence of hydrogen peroxide on initial leaf and coleoptiles growth in etiolated wheat (Triticum aestivum L) seedlings
2003
Hameed, A. (Nuclear Inst. for Agriculture and Biology, Faisalabad (Pakistan). Mutation Breeding Division) | Malik, S.A. | Iqbal, N. | Arshad, R. | Farooq, S.
Influence of oxidative stress induced by exogenous application of hydrogen peroxide on initial leaf and coleoptiles growth in etiolated wheat seedlings was studied. Leaf and coleoptiles growth parameters (mean fresh weight and length) showed a transient stress effect during very initial age, becoming non-significant (P greater than 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 greater than 0.05). Mean coleoptiles fresh weight was significantly (P less than 0.01) lower in stressed seedlings on all days except on 6th and 8th day where the difference was non- significant (P greater than 0.05). Mean leaf and coleoptiles length were significantly (P less than 0.01) lower in stressed seedlings during 5 to 7th day, however the difference was non-significant (P greater than 0.05) on 8th day. Stress effect was more pronounced on 5th day in case of leaf and coleoptiles length and coleoptiles 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 coleoptiles growth, which indicated the adaptation of seedlings to applied stress.
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