文献类型：期刊文献

中文题名：香附子光合生理对三峡库区消落带陆生环境的响应

英文题名：Photosynthetic Physiology Response of Cyperus rotundus to Terrestrial Environment in Hydro-fluctuation Belt of Three Gorges Reservoir Area

作者：裴顺祥[1] 洪明[2] 郭泉水[2] 秦爱丽[2] 马凡强[2] 肖文发[2] 简尊吉[2] 陈俊[3]

第一作者：裴顺祥

机构：[1]中国林业科学研究院华北林业实验中心,北京102300;[2]中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室,北京100091;[3]北京中兰环境工程有限公司,北京100195

年份：2017

卷号：37

期号：3

起止页码：561-568

中文期刊名：西北植物学报

外文期刊名：Acta Botanica Boreali-Occidentalia Sinica

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：“十二五”农村领域国家科技计划(2015BAD07B040301)

语种：中文

中文关键词：三峡库区;消落带;香附子;光合生理;响应

外文关键词：Three Gorges Reservoir area; hydro-fluctuation belt; Cyperus rotundus; photosynthetic physiology; response

分类号：Q945.79

摘要：植物在消落带水淹结束后的陆生环境中能否合成和储存足够的碳水化合物,对其在消落带长期定居、存活和扩散具有重要影响。香附子是能够适应三峡库区消落带生境的少数多年生草本植物之一。该试验通过对消落带水淹结束后生长在深水(22~27m)、浅水(2~7m)和未淹区段香附子光合生理的定期观测,研究其在陆生环境下的光合生理变化及其形成机制。结果表明:(1)生长在深水区段香附子的净光合速率(P_n)显著高于浅水区段与未淹区段。(2)随着香附子在陆生环境中生活时间的延长,其P_n、气孔导度、表观水分利用效率、表观光能利用效率、表观CO_2利用效率增加。(3)与未淹区段相比,浅水淹没区段香附子的光饱和点显著升高,而光补偿点显著降低。研究发现,淹水胁迫后积极的自我调节能力和光合补偿机制是香附子能够适生于三峡库区消落带的重要原因。
Whether plants can synthesise and stored abundant carbohydrate in the terrestrial environment in hydro-fluctuation belt after water flooding have important influence on their long-term settlement,survival and spread of the plants living in hydro-fluctuation belt.Cyperus rotundus is one of the few perennial herbs that able to adapt to the habitat of hydro-fluctuation belt in the Three Gorges Reservoir area.In order to study the changes of C.rotundus photosynthetic physiology and its formation mechanism in the terrestrial environment,we regularly observed the photosynthetic physiology of C.rotundus which grow inthe deep water（22-27 m）,shallow water（2-7 m）and non-flooded zone in hydro-fluctuation belt of Three Gorges Resevoir area after water flooded.The results as follows：（1）the net photosynthetic rates（Pn）of C.rotundus growth in deep water and shallow water were significantly higher than that in nonflooded area;（2）the Pn,stomatal conductance,apparent water use efficiency,apparent light use efficiency and apparent CO2 use efficiency increased with the extension of C.rotundusliving in terrestrial environment;（3）the light saturation point of C.rotundus which grow in shallow water was significantly rose,while the light compensation point was significantly decreased.Positive self-adjustment ability and the photosynthetic compensation mechanism of C.rotundus after water flooded stress are important reasons for its adaptation to hydro-fluctuation belt in the Three Gorges Reservoir area.