华东师范大学学报（自然科学版） ›› 2021, Vol. 2021 ›› Issue (2): 142-150.doi: 10.3969/j.issn.1000-5641.2021.02.014

• 生态与环境科学 • 上一篇    下一篇

上海辰山植物园木本植物幼枝导管特征及其权衡关系

李媛媛1, 商侃侃2, 张希金1, 宋坤1,3,4,*()   

  1. 1. 华东师范大学 浙江天童森林生态系统国家野外科学观测研究站, 上海　200241
    2. 上海辰山植物园(中科院上海辰山植物科学研究中心), 上海　201602
    3. 华东师范大学 上海市城市化生态过程与生态恢复重点实验室, 上海　200241
    4. 崇明生态研究院, 上海　202162
  • 收稿日期:2020-06-28 出版日期:2021-03-25 发布日期:2021-04-01
  • 通讯作者: 宋坤 E-mail:ksong@des.ecnu.edu.cn
  • 基金资助:
    国家自然科学基金(31500355, 31600343); 上海市科技创新行动计划(18DZ1204602, 18DZ1204704); 上海市绿化和市容管理局项目（G182420）

Vessel characteristics and the density-size relationship of woody plantsat the Shanghai Chenshan Botanical Garden

Yuanyuan LI1, Kankan SHANG2, Xijin ZHANG1, Kun SONG1,3,4,*()   

  1. 1. Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, East China Normal University, Shanghai　200241, China
    2. Shanghai Chenshan Botanical Garden (Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences), Shanghai　201602, China
    3. Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai　200241, China
    4. Institute of Eco-Chongming, Shanghai　202162, China
  • Received:2020-06-28 Online:2021-03-25 Published:2021-04-01
  • Contact: Kun SONG E-mail:ksong@des.ecnu.edu.cn

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摘要：

以上海市辰山植物园85种常见木本植物为研究对象, 通过解剖木质部结构, 分析了枝条导管特征在不同生活型物种间的差异及其系统发育信号, 揭示了导管密度-大小权衡关系在不同生活型物种间的差异. 结果表明: ①常绿木本植物的导管直径((28.55 ± 8.84) μm)和导管占比(8.7% ± 2.89%)均显著小于落叶木本植物导管直径((35.81 ± 13.92) μm)和导管占比(12.7% ± 4.82%), 而导管密度在常绿((149.3 ± 75.62) N/mm2)和落叶((164.5 ± 154.28) N/mm2)木本植物之间则无显著差异; 乔木的导管直径((35.86 ± 13.5) μm)显著大于灌木((26.24 ± 8.84) μm), 导管占比和密度在乔木(12.09% ± 5.01%, (151.9 ± 142.73) N/mm2)和灌木(10.59% ± 2.99%, (208.7 ± 126.37) N/mm2)之间则无显著差异. ②导管直径、导管密度存在显著的系统发育信号, 且导管密度信号大于导管直径, 导管占比则无明显的谱系信号存在. ③标准化主轴估计分析表明, 导管密度-大小权衡关系普遍存在, 不同生活型植物具有相同的斜率系数(k = –0.89, 95%的置信区间CI 为 –0.98 ~ –0.79), 但常绿乔木的纵截距显著小于落叶乔木, 即相同导管密度下落叶乔木比常绿乔木具有更大的导管直径.

关键词: 植物功能性状, 导管特征, 生活型, 密度-大小权衡, 系统发育

Abstract:

In this study, we measured the branch xylem structure of 85 woody plant species at the Shanghai Chenshan Botanical Garden to compare vessel characteristics among different life forms and check their phylogenetic signals. The trade-off between vessel density and vessel size was subsequently compared among different life forms. The results showed that: ① The vessel diameter ((28.55 ± 8.84) μm) and vessel ratio (8.7% ± 2.89%) of evergreen woody plants were significantly smaller than the vessel diameter ((35.81 ± 13.92) μm) and vessel ratio (12.7% ± 4.82%) of deciduous woody plants; meanwhile, there was no significant difference observed in the vessel density between evergreen plants ((149.3 ± 75.62) N/mm2) and deciduous plants ((164.5 ± 154.28) N/mm2). The vessel diameter of trees ((35.86 ± 13.5) μm) was significantly larger than that of shrubs ((26.24 ± 8.84) μm), but there was no significant difference observed in the vessel ratio and vessel density between trees (12.09% ± 5.01%; (151.9 ± 142.73) N/mm2) and shrubs (10.59% ± 2.99%; (208.7 ± 126.37) N/mm2). ② There were significant phylogenetic signals observed in vessel diameter and vessel density, and the signal of vessel density was larger than that of vessel diameter. There was, however, no obvious phylogenetic signal in the vessel ratio. ③ The standardized major axis test indicated that the trade-off between vessel density and vessel size existed in all life forms, with a common slope coefficient of –0.89 and a 95% confidence interval (–0.98 ~ –0.79). However, the intercept of evergreen trees was significantly smaller than that of deciduous trees, suggesting that deciduous trees have a larger vessel diameter than evergreen trees for a given vessel density.

Key words: plant functional traits, vessel traits, life form, density-size trade-offs, phylogeny

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