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Physiological responses and adjustment mechanisms of the dominate species of natural vegetation of Eastern Tengger Desert 被引量:1
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作者 HaiYan Zhou HuiJuan Tan +3 位作者 ZhiShan Zhang XiaoHong Jia HengWen Fan JianLi Yuan 《Research in Cold and Arid Regions》 2010年第5期455-463,共9页
Reaumuria soongorica and Salsola passerina have significant differences in ecophysiological characteristics, which change with the environmental variations. Although they live together for a long period of time, their... Reaumuria soongorica and Salsola passerina have significant differences in ecophysiological characteristics, which change with the environmental variations. Although they live together for a long period of time, their adaptive mechanisms to environmental stresses are very different. As two extreme xerophytes, Reaumuria soongorica and Salsola passerina differ significantly from other psammophytes in ecophysiological characteristics; they can survive in lower water potential, and can even grow in piedmont areas. Low water potential may be related to the existence of osmosis-regulating substance, such as praline, which can strengthen the capacity of water absorption. Compared to other psammophytes, Reaumuria soongorica and Salsola passerina have a higher degree of photo-inhibition under the same condition, and the photo-inhibition can lead to destruction of the photosynthetic pigment, nevertheless, this photo-inhibition can be repaired under suitable conditions in the morning and evening. 展开更多
关键词 gas exchange water potential osmosis regulating Reaumuria soongorica Salsola passerina
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