骆驼刺叶片形态和叶绿素荧光特性对不同潜水埋深的响应  

Responses of leaf morphology and PSⅡ chlorophyll fluorescence in leaves of Alhagi sparsifolia growing in soils with varying depths to the groundwater table

作　　者：王波[1,2,3,4] 曾凡江 张波[1,2,3,4] 高欢欢[1,2,3,4] 张玲 李梅梅[1,2,3,4] 罗瀚林 李世民[1,2,3,4] 

机构地区：[1]中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐830011 [2]新疆策勒荒漠草地生态系统国家野外科学观测研究站,新疆策勒848300 [3]中国科学院干旱区地理与生物资源重点实验室,新疆乌鲁木齐830011 [4]中国科学院大学,北京100049

出　　处：《草业科学》2018年第3期606-613,共8页Pratacultural Science

基　　金：国家自然科学基金委-新疆联合基金重点支持项目(U1603233);国家自然科学基金(41371516;31500367)

摘　　要：本研究以策勒绿洲-过渡带自然生境中不同潜水埋深(2.5、4.5、11.0 m)骆驼刺(Alhagi sparsifolia)为研究对象,分析了自然生境中骆驼刺叶片形态、叶绿素含量和叶绿素荧光特征对不同潜水埋深的响应。结果表明,潜水埋深由2.5m增加到4.5 m时,骆驼刺的叶面积、比叶面积和叶绿素b含量分别增加22%、15%和14%,叶片厚度减小18%,差异均达到显著水平(P<0.05);当潜水埋深由4.5 m增加到11.0 m时,叶面积、叶片厚度、叶绿素a含量、叶绿素b含量和叶绿素(a+b)含量分别增加14%、15%、17%、32%和21%,最大荧光Fm、PSⅡ潜在活性Fv/Fo和PSⅡ最大光化学效率Fv/Fm分别升高14%、24%和9%,比叶面积减小12%,差异均达到显著水平(P<0.05)。研究结果可为策勒绿洲-过渡带中自然生长的骆驼刺的保护及生态恢复提供科学依据。Here we report our study of the responses of leaf morphology,pigment content,and chlorophyll fluorescence in A. sparsifolia shrubs growing in soils where the groundwater table is found at 2. 5,4. 5 or 11. 0 m deep into the soil profile,in a natural arid environment in northwest China. The results showed that at 4. 5 m groundwater table depth,leaf area,specific leaf area,and chlorophyll( Chl) b were 22%,15% and 14% greater than at 2. 5 m groundwater table depth,respectively; whereas,leaf thickness was 18% thinner. Additionally,leaf area,leaf thickness,Chl a,Chl b,Chl( a + b),maximum fluorescence yield( Fm),potential activity of PSⅡ( Fv/Fo),and maximum photochemical efficiency of PSⅡ( Fv/Fm) at 11. 0 m groundwater table depth were greater by 14%,15%,17%,32%,21%,14%,24% and 9%,respectively,relative to 4. 5 m depth to the groundwater table; whereas,specific leaf area was 12%smaller. This research provides a sound theoretical basis to better protect and restore A. sparsifolia in the Cele oasis-desert transitional zone in northwest China.

关 键 词：绿洲-荒漠过渡带 潜水埋深 叶面积 比叶面积 叶绿素 最大荧光 PSⅡ最大光化学效率 

分 类 号：Q945.11[生物学—植物学]