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研究论文

五角槭不同生活史阶段叶枝根性状的变异与权衡

  • 王思琦 ,
  • 金光泽
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  • 1东北林业大学生态研究中心, 哈尔滨 150040
    2东北林业大学森林生态系统可持续经营教育部重点实验室, 东北亚生物多样性研究中心, 哈尔滨 150040
*金光泽(taxus@126.com); ORCID: 0000-0002-9852-0965

收稿日期: 2024-03-22

  录用日期: 2024-06-01

  网络出版日期: 2024-06-05

基金资助

国家自然科学基金(32071533);黑龙江省自然科学基金(TD2023C006);中央高校基本科研业务费专项资金(2572022DS13)

Variation and trade-offs in leaf, branch, and root traits at different life history stages of Acer pictum subsp. mono

  • WANG Si-Qi ,
  • JIN Guang-Ze
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  • 1Center for Ecological Research, Northeast Forestry University, Harbin 150040, China
    2Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Asia Biodiversity Research Center, Northeast Forestry University, Harbin 150040, China

Received date: 2024-03-22

  Accepted date: 2024-06-01

  Online published: 2024-06-05

Supported by

National Natural Science Foundation of China(32071533);Natural Science Foundation of Heilongjiang Province(TD2023C006);Fundamental Research Funds for the Central Universities(2572022DS13)

摘要

五角槭(Acer pictum subsp. mono)是阔叶红松林的主要伴生树种, 对阔叶红松林的结构与功能具有重要作用。研究五角槭在不同生活史阶段叶-枝-根功能性状及其相关关系, 对理解植物功能性状种内变异以及对资源的获取和分配策略具有重要意义。该研究以黑龙江凉水国家级自然保护区阔叶红松林内的五角槭幼苗、幼树和成年树为研究对象, 分析了叶、枝和根的12个生理、形态性状和碳(C)、氮(N)、磷(P)含量等化学计量学特征, 探讨了不同生活史阶段对叶-枝-根性状的变异及其性状间相关性的影响。结果表明: (1)随生活史阶段上升, 叶厚度、枝组织密度、根直径、叶N含量以及叶、枝和根的C含量均显著增加, 比叶面积、净光合速率、比根长均显著降低, 且各性状在生活史阶段存在不同程度的种内变异; (2)生理、形态性状与化学性状在叶和枝中相关性较高, 而细根中仅比根长与化学性状存在相关关系; (3)随生活史阶段上升, 叶片N含量和净光合速率增大, 光合产物积累较多, 叶片由“缓慢投资-收益”型转变为“快速投资-收益”型; 枝含水率等代谢能力以及细根的资源获取能力降低, 枝和根均由“资源获取”型转变为“资源保守”型。

本文引用格式

王思琦 , 金光泽 . 五角槭不同生活史阶段叶枝根性状的变异与权衡[J]. 植物生态学报, 2024 , 48(11) : 1510 -1523 . DOI: 10.17521/cjpe.2024.0081

Abstract

Aims Acer pictumsubsp. mono is a main accompanying tree species in broadleaf Korean pine (Pinus koraiensis) forests, and plays an important role in the structure and function of broadleaf Korean pine forests. Studying the variation in functional traits of leaves, branches, and roots of Acer pictumsubsp. mono at different life-history stages is of great significance for understanding intra species variation in plant traits, and strategies for plant resource acquisition and allocation.

Methods This article focused on the seedling, sapling, and adult trees of A. pictumsubsp. mono in the broadleaf Korean pine forests of Liangshui National Nature Reserve located in Heilongjiang. Twelve physiological and morphological traits of leaves, branches, and roots were measured, and chemometric traits such as carbon (C), nitrogen (N), and phosphorus (P) contents of different plant organs were analyzed. We then explored the influence of different life history stages on the variation of leaf, branch, and root traits, and the trait-trait correlations.

Important findings (1) With the development of plant life history, leaf thickness, branch tissue density, root diameter, leaf N content, and C contents of leaves, branches, and roots increased significantly, whereas specific leaf area, net photosynthetic rate, and specific root length decreased significantly. Additionally, intraspecific variation of each trait varied in different life history stages. (2) Correlations among traits of leaves and branches were significants, yet in fine roots, only specific root length was correlated with chemical traits. (3) Leaf N content, net photosynthetic rate, and photosynthetic products increased with the development of plant life history. Leaves varied from a “slow investment-return” type to a “fast investment-return” type. Moreover, the metabolic capacity such as branch water content, and the ability of resource acquisition of fine roots decreased. Both branches and roots transitioned from a “resource acquisition” type to a “resource conservation” type.

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