Chinese Bulletin of Botany ›› 2003, Vol. 20 ›› Issue (05): 558-564.
• 研究论文 • Previous Articles Next Articles
OU Zhi-Ying PENG Chang-LianLIN Gui-Zhu WEN Xue
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Abstract: Increase in cell membrane ion leakage was induced by Methyl Viologen-mediated photooxidation in two rice cultivars, ‘Shanyou63'' (developed hybrid cultivar) and ‘Peiai64S/E32'' (super high-yielding hybrid cultivar). More increment of cell membrane leakage was shown in ‘Shanyou63'' than that in ‘Peiai64S/E32'' which means less damage to cell membrane in ‘Peiai64S/E32'' than in ‘Shanyou63'' under photooxidation.‘Peiai64S/E32'' had higher values of photosynthetic oxygen evolution competence (Amax,Φi)、PSⅡ activity (Fv/Fm, ΦPSⅡ) and chlorophyll fluorescence quenching coefficient (qP, NPQ) and less reduction under photooxidation in comparison with ‘Shanyou63''. In addition, ‘Peiai64S/E32'' had as much as 3 folds increase in activities of SOD and APX than ‘Shanyou63'' under photooxidation. These results indicated that super high-yielding rice ‘Peiai64S/E32'' exhibited more resistance to photooxidation mediated by MV than ‘Shanyou63''.
OU Zhi-Ying PENG Chang-LianLIN Gui-Zhu WEN Xue. The Characters and Mechanism of Photooxidation Tolerance in Leaves of Peiai64S/E32, a Super High-yielding Hybrid Rice (Oryza sativa L.)[J]. Chinese Bulletin of Botany, 2003, 20(05): 558-564.
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