文献类型：期刊文献

中文题名：区域尺度上麻栎叶片性状对环境因子的响应规律

英文题名：Response of Leaf Traits of Quercus acutissima to Environmental Factors at Regional Scale

作者：王晶媛[1] 张慧[1] 虞木奎[1,2] 方炎明[3] 吴统贵[1,2]

第一作者：王晶媛

机构：[1]中国林业科学研究院亚热带林业研究所;[2]国家林业局华东沿海防护林生态系统定位观测研究站;[3]南京林业大学生物与环境学院

年份：2017

卷号：26

期号：5

起止页码：754-762

中文期刊名：生态环境学报

外文期刊名：Ecology and Environmental Sciences

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

基金：国家自然科学基金项目(31570853;31370666)

语种：中文

中文关键词：叶片性状;气象因子;海拔;纬度;麻栎

外文关键词：leaf traits; meteorological factors; altitude; latitude; Quercus acutissima

分类号：S718.45;X173

摘要：叶片性状反映了植物对环境的适应能力及其自我调控能力。区域尺度上单一物种叶片功能和形态性状的变化规律尚存在争议。以25个麻栎(Quercus acutissima)天然林种群为对象,采用野外调查和室内实验相结合的方法,分析了区域尺度上比叶面积(SLA),单位叶重的氮质量分数(Nmass)、磷质量分数(Pmass)、叶氮磷比(N∶P),单位叶面积的氮质量分数(N_(area))、磷质量分数(Parea)等功能性状和叶片面积(LA)、周长(LP)、叶长度(LL)、叶宽度(LW)、叶片长宽比(L∶W)等形态性状的变化。结果表明,(1)麻栎叶片面积变化范围为28.53~59.41 cm^2;周长为31.21~47.54 cm;叶长为11.72~17.25cm;叶宽为3.41~5.46 cm;叶长宽比为2.79~3.75;比叶面积为77.38~152.71 cm^2·g^(-1);Nmass为17.90~26.20 mg·g^(-1);Pmass为0.68~1.61mg·g^(-1);N_(area)为1.42~2.63 mg·cm^(-2);Parea为0.07~0.13 mg·cm^(-2);N∶P为14.01~28.80。(2)随着海拔的增加,麻栎比叶面积、Nmass及叶宽均呈先下降后上升的二次曲线变化趋势(P<0.05),而N_(area)则呈先上升后下降的二次曲线变化趋势(P<0.05)。(3)麻栎叶片面积和长度随等效纬度的增加均呈先上升后下降的二次曲线变化趋势(P<0.05)。(4)麻栎叶片面积、长度及宽度随年均温度的升高均呈先上升后下降的二次曲线变化趋势(P<0.05)。(5)随着年均降水量的增加,麻栎叶长度呈先上升后下降的趋势(P<0.05),而叶片面积与其呈显著正相关(P<0.05)。叶片功能性状主要受海拔引起的水热变化的影响,而叶片形态性状则主要受到海拔、纬度及气象因子综合作用的影响。研究结果有助于揭示区域尺度上植物叶性状的变化规律及其环境机制,为预测植物性状在未来环境下的变化及适应奠定基础。
Leaf traits play crucial roles in plant adaptation and regulation to complex environmental conditions.The variation of leaffunctional and morphological traits of a single species at regional scale is still unclear.In this study,25natural populations ofQuercus acutissima were selected to analyze the variation of11leaf traits(specific leaf area,Narea,Parea,Nmass,Pmass and N∶P andother morphological traits such as leaf area,leaf perimeter,leaf length,leaf width,length-width ratio)at regional scale,which basedon field investigation and lab measurements.The results showed that,(1)the leaf area varied from28.53cm2to59.41cm2,leafperimeter varied from31.21cm to47.54cm,leaf length varied from11.72cm to17.25cm,leaf width varied from3.41cm to5.46cm,length-width ratio was2.79to3.75,the specific leaf area varied from77.38cm2·g-1to152.71cm2·g-1,Nmass varied from17.90mg·g-1to26.20mg·g-1,Pmass varied from0.68mg·g-1to1.61mg·g-1,Narea varied from1.42mg·cm-2to2.63mg·cm-2,Parea varied from0.07mg·cm-2to0.13mg·cm-2,N∶P was14.01to28.80.(2)The specific leaf area,Nmass,and leaf width of Q.acutissima decreasedfirstly and then increased with the increase of elevation(P<0.05),and Narea showed almost opposite trend(P<0.05).(3)The leaf areaand length increased firstly and then decreased with the increase of latitude(P<0.05).(4)The leaf area,length and width increasedfirstly and then decreased with the increase of annual average temperature(P<0.05).And(5)the leaf length increased firstly and thendecreased with the increase of annual precipitation,and it was positively correlated with the leaf area(P<0.05).The leaf functionaltraits were mainly affected by altitude,water,heat or hydrothermal changes,while the leaf morphological traits were influenced byaltitude and latitude,and which were closely related to meteorological factors.The results of this study are beneficial to reveal thechanges of plant leaf traits and their environmental mechanisms at the regional scale,which will provide a foundation for predictingchanges of plants traits and adaptation in the future environment.