青海湖畔3种盐生植物光合生理指标的测定  

Mensuration on Photosynthetic Physiological Indices of Three Typical Halophytes near the Qing-hai Lake

作　　者：拉本[1,2] 苏旭[1,2] 刘玉萍[3] 

机构地区：[1]青海师范大学生命与地理科学学院,青海西宁810008 [2]青海师范大学青藏高原环境与资源教育部重点实验室,青海西宁810008 [3]青海师范大学思想政治理论课教学科研部,青海西宁810008

出　　处：《草地学报》2013年第3期508-511,共4页Acta Agrestia Sinica

基　　金：国家自然科学基金项目(31260052);青海湖湿地种植试验及生态环境监测(012050208);系统与进化植物学国家重点实验室项目(LSEB2012-01);青海省自然科学基金项目(2011-Z-745);教育部"春晖计划"合作科研项目(Z2010078);青海师范大学科研创新计划项目(012050106);青海师范大学博士科研启动经费(202500205)资助

摘　　要：为揭示青藏高原地区盐生植物的光合生理特性,采用常规生理指标测定法对自然生长于青海湖畔3种典型盐生植物-灰绿藜(Chenopodium glaucum L.)、鹅绒委陵菜(Potentilla ansrina L.)和西伯利亚蓼(Polygonum sibiricum Laxm.)的光合生理指标进行研究。结果表明:在1000～2400ds.cm-1盐浓度范围内,3种盐生植物的净光合速率、表观量子效率和光补偿点均与盐胁迫强度成负相关,而光饱和点则随盐胁迫强度的增加而增加。青海湖畔3种典型盐生植物形成的上述光合生理指标变化是对高原盐生环境的高度适应,是青藏高原特殊生态条件长期胁迫的结果。In order to reveal the photosynthetic physiological characteristics of halophytes including Chenopodium glaucum L.,Potentilla anserina L.and Polygonum sibiricum Laxm.in Qing-Tibetan Plateau,the photosynthetic physiological indices were studied by the determining method of common physiological index.Results showed that within the range of salt concentration（1000~2400 ds·cm-1）,there was negative correlation between the photosynthetic rate（Pn）,apparent quantum yield（AQY）,light saturation points and salt concentration,while light compensation point increased with increased salt concentration.These results suggested that all changes of photosynthetic physiological indices of three typical halophytes near the Qinghai Lake were an adaptation of the plant to the Qinghai-Tibet Plateau saline environments,as well as the result of long term ecological stress.

关 键 词：青海湖畔 盐生植物 光合生理指标 

分 类 号：Q945.11[生物学—植物学]