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冰川冻土  2007 

高山冰缘植物粗脂肪、可溶性糖和类黄酮的含量变异与环境适应关系的研究

, PP. 947-952

Keywords: 高山冰缘植物,生理抗性物质,含量变异,环境适应

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Abstract:

以乌鲁木齐河源区3个植被垂直分布带的22种主要冰缘植物花期叶片为实验材料,分析了叶片的粗脂肪、可溶性糖和类黄酮的含量.研究结果表明同一植被带有些植物之间的这3种生理抗性物质含量接近,有些植物的含量却存在显著差异,与植物自身的遗传特性和采取的生态对策有关.从样品平均含量值的统计分析看,高山流石堆植被的粗脂肪、可溶性糖和类黄酮含量高于垫状和高山草甸植被的含量,3个分布带植物的可溶性糖平均含量存在显著差异,类黄酮平均含量不存在显著差异.多数高山冰缘植物积累高含量的粗脂肪、可溶性糖和类黄酮,提高了植物的抗冻和抗紫外线辐射的能力,是植物适应冰缘环境的物质基础,这些生理抗性物质在含量上的差异说明可溶性糖是增加冰缘植物抗冻性的关键物质.

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