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    高林浩, 孙晗, 白雪卡, 代爽, 樊艳文, 刘超, 王襄平, 尹伟伦. 气候、系统发育对长白山乔灌木比叶面积与叶元素含量关系的影响[J]. 北京林业大学学报, 2020, 42(2): 19-30. DOI: 10.12171/j.1000-1522.20190320
    引用本文: 高林浩, 孙晗, 白雪卡, 代爽, 樊艳文, 刘超, 王襄平, 尹伟伦. 气候、系统发育对长白山乔灌木比叶面积与叶元素含量关系的影响[J]. 北京林业大学学报, 2020, 42(2): 19-30. DOI: 10.12171/j.1000-1522.20190320
    Gao Linhao, Sun Han, Bai Xueqia, Dai Shuang, Fan Yanwen, Liu Chao, Wang Xiangping, Yin Weilun. Effects of climate and phylogeny on the relationship between specific leaf area and leaf element concentration of trees and shrubs in Changbai Mountain of northeastern China[J]. Journal of Beijing Forestry University, 2020, 42(2): 19-30. DOI: 10.12171/j.1000-1522.20190320
    Citation: Gao Linhao, Sun Han, Bai Xueqia, Dai Shuang, Fan Yanwen, Liu Chao, Wang Xiangping, Yin Weilun. Effects of climate and phylogeny on the relationship between specific leaf area and leaf element concentration of trees and shrubs in Changbai Mountain of northeastern China[J]. Journal of Beijing Forestry University, 2020, 42(2): 19-30. DOI: 10.12171/j.1000-1522.20190320

    气候、系统发育对长白山乔灌木比叶面积与叶元素含量关系的影响

    Effects of climate and phylogeny on the relationship between specific leaf area and leaf element concentration of trees and shrubs in Changbai Mountain of northeastern China

    • 摘要:
      目的比叶面积(SLA)是植物关键的功能性状,受气候及系统发育影响且与叶片元素含量关系密切,探讨SLA和这些因子的关系,能够反映植物环境适应及资源收支的策略。同时,乔木、灌木是两种不同生活型植物,研究相关的适应策略是否存在差异。
      方法对长白山海拔梯度上森林样地内常见乔木和林下灌木进行比较,利用DNA条形码序列建立了系统发育树。分析了SLA与叶片元素含量、气候因子和系统发育间的关系,并研究了SLA与叶片元素含量关系及这类关系所受气候和系统发育的影响在乔、灌木间的差异。
      结果(1) 乔木、灌木SLA均与年降水负相关,与温度条件(最冷月均温、潜在蒸散量)正相关。和灌木相比,乔木SLA受系统发育的影响更大。(2) 乔木、灌木SLA均与TN(全氮)、TP(全磷)含量正相关,与TC(全碳)含量负相关;乔木、灌木SLA和TN、TP间关系的斜率差异显著,和TC间关系的斜率差异不显著。(3) 系统发育影响乔木、灌木SLA与TN、TC间关系的斜率;气候因子影响乔木、灌木SLA与TC间关系的斜率,这两类因子也影响灌木SLA和TP关系的斜率;但乔木SLA和TP关系的斜率不受上述因子影响。
      结论乔木、灌木SLA对环境的适应及资源收支的策略基本相似,但SLA和TP间关系的影响因子在乔木和灌木中存在一定差异。相对于乔木,林下灌木有趋同进化趋势、SLA普遍较高且对气候更敏感,可能会在叶片内存储更多的磷来满足生存的需要。

       

      Abstract:
      ObjectiveSpecific leaf area (SLA) is a key functional trait of plants. It is affected by climate and phylogeny, and is closely associated with leaf element concentration. Therefore, the relationships between SLA and the abiotic and biotic factors are useful for understanding the strategies of plants in adaptation to environment and resource utilization. Meanwhile, trees and shrubs belong to different life forms, so we need to examine whether they differ in adaptation strategies related to SLA.
      MethodThis study was based on the comparison of dominant tree and understory shrub species in sample plots along the altitudinal gradient of Changbai Mountain, northeastern China. We established a phylogenetic tree using DNA barcode sequences, and analyzed the relationships of SLA with leaf element concentrations, climatic factors and phylogeny. We examined whether the relationships between SLA and leaf element concentrations, and the influence of climate and phylogeny, were different between trees and shrubs.
      Result(1) The SLA of trees and shrubs was negatively correlated with mean annual precipitation and positively correlated with thermal conditions (mean temperature of the coldest month and potential evapotranspiration). However, different from shrubs, the SLA of trees was more affected by phylogeny. (2) For both trees and shrubs, SLA was positively correlated with leaf total nitrogen (TN) and total phosphorus (TP) concentrations, but negatively correlated with total carbon (TC) concentration. Trees and shrubs differed significantly in the regression slopes of SLA with TN and TP, but did not differ in the slope of SLA with TC. (3) Climatic factors significantly affected the slope of the relationship between SLA and TC, while phylogeny affected the slope of SLA with TN and TC for both trees and shrubs. Climatic factors and phylogeny together affected the slope between SLA and TP for shrubs, but not for trees.
      ConclusionThe adaptation of SLA to environment and the resource utilization strategy were similar for trees and shrubs, but there were also differences in the modulators of the relationship between SLA and TP for trees and shrubs. Compared with trees, the understory shrubs have a tendency to convergent evolution, generally with high-SLA leaves and more sensitive to climate, and may store more phosphorus in the leaves to meet the needs of survival.

       

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