胡杨(Populus euphratica)叶片结构与功能关系  

Leaf Structure and Functional Traits of Populus euphratica

作　　者：潘莹萍 陈亚鹏[2] 王怀军[1,2] 任志国[3] Pan Yingping;Chen Yapeng;Wang Huaijun;Ren Zhiguo(School of Urban and Environmental Science,Huaiyin Normal University,Huaian 223300,Jiangsu,China;State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;Heihe Remote Sensing Experimental Research Station,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]淮阴师范学院城市与环境学院,江苏淮安223300 [2]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 [3]中国科学院寒区旱区环境与工程研究所黑河遥感试验研究站,甘肃兰州730000

出　　处：《中国沙漠》2018年第4期765-771,共7页Journal of Desert Research

基　　金：国家自然科学基金项目(41371515);中国科学院"率先行动"计划课题(TSS-2015-014-FW-2-3);江苏省高校自然科学研究面上项目(16KJB170001)

摘　　要：叶片形态特征与功能性状可以反映植物采取的协同或权衡策略。测定了塔里木河下游不同地下水埋深下荒漠河岸林建群种胡杨(Populus euphratica)的叶片解剖结构、叶片水力导度、叶片δ13 C值,探讨了胡杨结构性状指标和功能指标对地下水埋深的响应,叶片水力传输能力与叶片解剖结构变化趋势,以及叶片水力参数、解剖结构与水分利用效率的相关关系。结果表明:(1)胡杨叶片结构指标(叶片厚度、表皮厚度、栅栏组织厚度、气孔参数、叶脉密度、主脉导管直径)、功能指标(叶片最大水力导度、水分利用效率、比叶质量)在地下水埋深最深处与地下水埋深最浅处差异显著;(2)不同地下水埋深下胡杨水分传输能力变化有解剖结构基础,叶片水分传输能力与水分散失能力存在协同关系;(3)胡杨叶片水分利用效率与叶片解剖结构指标(叶片厚度、栅栏组织厚度、表皮厚度、气孔长度、气孔宽度、气孔密度)具有相关关系;(4)胡杨叶片水分传输与叶片碳投资具有协同关系。Leaf morphological and functional traits reflect the trade-off or coordinate strategies adopted by plants when they adapt to environmental stress.The study was conducted on Populus euphratica the constructive species of the riparian forest in the lower reaches of Tarim River.We measured leaf anatomical traits,leaf hydraulic conductance,δ13 C values of P.euphratica grown at different groundwater depths,discussing how morphological and functional traits response to variation in groundwater depth.We also assessed the variation trend between hydraulic conductance capacity and anatomical structure,as well as analyzed the correlations between leaf hydraulic parameters,anatomical traits and water use efficiency.The results showed that：（1）Leaf anatomical traits（leaf thickness,epidermal thickness,palisade tissue thickness,stomatal parameters,vein density,main vein diameter）and functional traits（maximum leaf hydraulic conductance,water use efficiency,leaf mass per area）changed significantly in the deepest groundwater depth compared with them in the shallowest groundwater depth.（2）The variation in water transport capacity of P.euphratica under different groundwater depths has its anatomical structure basis;there was a coordinate relationship between leaf water transport and water loss.（3）Correlations were found between leaf anatomical traits（leaf thickness,palisade tissue thickness,epidermal thickness,stomatal length,stomatal width,stomatal density）and water use efficiency.（4）Coordinate relationship existed between leaf water transport and carbon investment.

关 键 词：叶片水力参数 叶片解剖结构 水分利用效率 胡杨(Populus euphratica) 

分 类 号：Q944.3[生物学—植物学]