干旱区生态环境知识资源中心(Arid): 干旱程度对C_3植物红砂和C

Arid

	干旱程度对C_3植物红砂和C_4植物珍珠光合生理参数的影响
其他题名	Response of Photosynthetic Characteristics of C3 Desert Plant Reaumuria soongorica and C4 Desert Plant Salsola passerina to Different Drought Degrees
	严巧娣; 苏培玺; 高松
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2012
卷号	32 期号:2 页码:364-371
中文摘要	C3和C4植物混生在草地生态系统中较多,而在荒漠生态系统少见。在中国荒漠地区,C_3小灌木红砂和C_4半灌木珍珠在特定生境下混生在一起,以独特方式适应高温强光和干旱的极端环境。通过在不同干旱程度下测定它们生长期叶片的光合气体交换参数,探讨它们在混生条件下对极端环境的生理响应特征。结果表明,红砂的净光合速率(P_n)、蒸腾速率(E)、气孔导度(G_s)均要高于珍珠;而珍珠的水分利用效率(WUE)则要高于红砂。这表明珍珠和红砂在水分匮乏的荒漠生境下采取了不同的生存策略。红砂通过维持较高净光合速率和较高蒸腾速率来生存;而珍珠则通过高水分利用效率生存。
英文摘要	The mixed community of C_3 and C_4 plants is easily seen in grassland ecosystem,but hardly seen in desert ecosystem.In desert regions of China,some C_3 and C_4 shrubs coexist in particular manners in some specific habitats and adapt to the extreme arid environment,which is associated with high temperature and intensive radiation.The mixed communities of C_3 undershrub Reaumuria soongorica and C_4 subshrub Salsola passerina in the Heihe River Basin in Hexi Corridor were investigated.The physiological characteristics of gas exchange of R.soongorica and S.passerina in the mixed community were determined under different drought degrees.Results showed that net photosynthetic rate(P_n),transpiration rate(E),stomatal conductance(G_s) of R.soongorica were all higher than S.passerina,while water use efficiency of S.passerina was higher than R.soongorica.The differential responses of the two species to severe habitat shows that R.soongorica and S.passerina take different strategies for survival when suffering water scarcity in the same desert habitats: R.soongorica uses the means of maintaining a higher net photosynthetic rate and a higher transpiration rate to survive,while S.passerina survives here through the higher water use efficiency.
中文关键词	红砂 ; 珍珠猪毛菜 ; 共存 ; 气体交换 ; 干旱适应策略
英文关键词	Reaumuria soongorica Salsola passerina coexistence gas exchange adaptive strategy to drought
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4457267
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228989
作者单位	中国科学院寒区旱区环境与工程研究所临泽内陆河流域研究站/植物逆境生理生态与生物技术实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	严巧娣,苏培玺,高松. 干旱程度对C_3植物红砂和C_4植物珍珠光合生理参数的影响[J]. 中国科学院西北生态环境资源研究院,2012,32(2):364-371.
APA	严巧娣,苏培玺,&高松.(2012).干旱程度对C_3植物红砂和C_4植物珍珠光合生理参数的影响.中国沙漠,32(2),364-371.
MLA	严巧娣,et al."干旱程度对C_3植物红砂和C_4植物珍珠光合生理参数的影响".中国沙漠 32.2(2012):364-371.