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棉花学报  2009 

三个不同耐高温棉花基因型主茎叶的生理生化特征

DOI: 1002-7807(2009)06-0492-05, PP. 492-496

Keywords: 棉花,高温耐性,主茎功能叶,生理生化特性

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Abstract:

对不同高温耐性棉花主茎叶的生理生化特性及其变化规律进行了比较研究。结果表明,耐高温棉花HLY细胞膜热稳定性显著高于敏感品系TS18,而与中度敏感品系XYM68在苗期和盛蕾期没有明显差异,到盛花和结铃盛期差异显著;三个材料之间的叶片脯氨酸含量除苗期外均存在显著差异,可溶性糖含量在结铃盛期才差异显著,而可溶性蛋白质含量差异不明显;HLY叶片叶绿素含量在盛花期和结铃盛期显著高于XYM68和TS18,而净光合速率在整个生育时期都显著高于XYM68和TS18。主茎叶细胞热稳定性、脯氨酸、可溶性糖及净光合速率能较好区分耐高温与敏感材料,这为耐高温棉花的筛选与鉴定提供了重要的生理生化指标。

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