文献类型：期刊文献

中文题名：淹水对三峡库区消落带香附子生长及光合特性的影响

英文题名：Effects of submergence on the growth and photosynthetic characteristics of Rhizoma cyperi in hydro-fluctuation belt of Three Gorges Reservoir area,Southwest China

作者：刘泽彬[1] 程瑞梅[1] 肖文发[1] 郭泉水[1] 王晓荣[2] 封晓辉[3]

第一作者：刘泽彬

机构：[1]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;[2]湖北省林业科学研究院,武汉470039;[3]中国科学院遗传与发育生物学研究所农业资源研究中心,石家庄050021

年份：2013

卷号：32

期号：8

起止页码：2015-2022

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：十二五林业科技支撑计划项目(2011BAD38BO4)资助

语种：中文

中文关键词：水淹胁迫;三峡库区;香附子;生长特征;光合;荧光

外文关键词：submergence stress; Three Gorges Reservoir area; Rhizoma cyperi; growth trait; photosynthesis; fluorescence

分类号：Q948.118

摘要：为了阐明三峡库区消落带水位变化对香附子实生幼苗的影响,本研究模拟三峡库区消落带水淹环境,设置对照(CK)、根淹(T1)、半淹(T2)、全淹(T3)4个处理组,揭示香附子对库区消落带水位变化引起的不同水淹环境的光合生理响应机制。结果表明:经过45d的水淹后,所有处理香附子植株的基径、茎高和非光化学淬灭都有所增加,说明香附子植株对不同水淹环境都做出了积极的响应;植株叶长、叶宽及地上生物量在不同水淹环境中有不同的响应,与对照相比,半淹处理植株叶长、叶宽及地上生物量有所增加,而根淹、全淹处理植株叶长、叶宽及地上生物量有所下降;随着水淹时间的增加,所有水淹处理植株叶片比叶面积、净光合速率、气孔导度、蒸腾速率、最大光化学效率、电子传递速率以及光化学淬灭都显著低于对照,根淹和半淹植株虽有下降,但仍能保持较高的水平,而全淹植株则下降明显。研究表明,香附子能很好地适应水淹环境(尤其是部分水淹环境),未来可以应用于三峡库区消落带的植被重建,特别是针对长期遭受水位涨落的低海拔区域(145～160m),同时,香附子响应水淹的特性也为未来三峡库区消落带耐淹植物的筛选提供了依据。
In order to explore the effects of water level change in the hydro-fluctuation belt of the Three Gorges Reservoir area on the growth of Rhizoma cyperi seedlings, a simulation experiment was conducted to study the response mechanisms of the seedling＆rsquo;s photosynthetic physiology to different submerged environments induced by the water level change. Four treatments were installed, i.e., no submergence （CK）, root submergence （T1）, semi-plant-submergence （T2）, and whole plant submergence （T3）. After treated for 45 days, the plant basal diameter, stem height, and non-photochemical quenching in all treatments tended to be increased, illustrating that R. cyperi could adapt to different submerged environments. The leaf length, leaf width, and aboveground biomass in different submerged environments differed. As compared to CK, the leaf length, leaf width, and aboveground biomass in T2 had some increase, while those in T1 and T3 had some decrease. With the increasing time of submergence, the specific leaf area, net photosynthetic rate, stomatal conductance, transpiration rate, maximal photochemical efficiency, electron transfer rate, and photochemical quenching were significantly lower than those in CK. However, all the parameters in T1 and T2 were still maintained at a higher level, while those in T3 were declined to an extremely lower level. This study indicated that R. cyperi could well adapt to submerged environment （especially partially submerged environment）, and thus, could be applied to the re-vegetation of the hydro-fluctuation belt in the Three Gorges Reservoir area, especially in the low altitude region （145-160 m） which had suffered from long-term water level fluctuation. The submergence-tolerance characteristics of R. cyperi also provided a basis for screening riparian plants in the hydro-fluctuation belt of the Three Gorges Reservoir area.