植物生态学报 ›› 2026, Vol. 50 ›› Issue (2): 334-343.DOI: 10.17521/cjpe.2024.0374  cstr: 32100.14.cjpe.2024.0374

• 研究论文 • 上一篇    下一篇

亚热带森林不同菌根真菌树种叶片和细根的碳氮磷化学计量特征

王梦雪1, 胡明艳1, 储诚进1, 陈阳2, 罗文启1, 马子龙1,*()   

  1. 1 中山大学生态学院, 广东深圳 518000
    2 中山大学生命科学学院, 广州 510275
  • 收稿日期:2024-10-21 接受日期:2025-01-20 出版日期:2026-02-28 发布日期:2026-04-01
  • 通讯作者: *马子龙 (mazlong@mail.sysu.edu.cn)
  • 基金资助:
    广东省基础与应用基础研究基金(2022A1515111035);广东省基础与应用基础研究基金(2023A1515010643);国家自然科学基金(32101272);国家自然科学基金(32330064);中央高校基本科研业务费专项资金(23lgbj009)

C, N, P stoichiometric characteristics of leaves and fine roots in different mycorrhizal tree species in subtropical forests

WANG Meng-Xue1, HU Ming-Yan1, CHU Cheng-Jin1, CHEN Yang2, LUO Wen-Qi1, MA Zi-Long1,*()   

  1. 1 School of Ecology, Sun Yat-sen University, Shenzhen, Guangdong 518000, China
    2 School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2024-10-21 Accepted:2025-01-20 Online:2026-02-28 Published:2026-04-01
  • Contact: *MA Zi-Long (mazlong@mail.sysu.edu.cn)
  • Supported by:
    Guangdong Basic and Applied Basic Research Foundation(2022A1515111035);Guangdong Basic and Applied Basic Research Foundation(2023A1515010643);National Natural Science Foundation of China(32101272);National Natural Science Foundation of China(32330064);Fundamental Research Funds for the Central Universities(23lgbj009)

摘要:

菌根真菌与宿主植物的碳(C)、氮(N)、磷(P)浓度及C、N、P化学计量特征紧密相关。然而, 亚热带森林中不同菌根真菌树种叶片和细根的C、N、P化学计量特征是否具有显著相关性尚不清楚。该研究依托广东省黑石顶自然保护区森林动态监测样地, 采集81个丛枝菌根(AM)树种和16个外生菌根(ECM)树种的叶片和细根样品并测定其C、N、P浓度, 以期阐明AM和ECM树种叶片和细根的C、N、P化学计量特征有何差异以及AM和ECM树种叶片和细根的C、N、P化学计量比是否协同变化。通过计算Blomberg’s K统计量以检验系统发育信号, 利用线性混合模型检验不同菌根类型树种之间叶片和细根的C、N、P浓度和化学计量比的差异, 利用皮尔逊相关系数检验不同菌根类型树种叶片和细根中C、N、P浓度之间以及化学计量比之间的相关性, 最后利用标准化主轴回归分析不同菌根类型树种叶片和细根之间C、N、P浓度及化学计量比的关系。主要结果: AM树种细根的P浓度高于ECM树种, 但是C:P低于ECM树种。AM和ECM树种叶片和细根的N浓度和P浓度之间, C:N和C:P之间均具有显著正相关关系。AM树种叶片和细根的C、N、P浓度及化学计量比之间都存在显著相关关系, 而ECM树种叶片和细根的N浓度、C:N、N:P之间存在显著相关关系。结果表明菌根真菌定殖会影响植物的化学元素组成及化学计量比, 但是AM和ECM树种叶片和细根间的C、N、P化学计量比都具有显著相关关系。

关键词: 丛枝菌根真菌, 外生菌根真菌, 化学计量比, 叶片, 细根

Abstract:

Aims Mycorrhizal fungi are closely related to the host’s carbon (C), nitrogen (N), phosphorus (P) concentrations, and C, N, P stoichiometric characteristics. However, whether the C, N, P stoichiometric characteristics in leaves and fine roots of different mycorrhizal tree species are significantly correlated in subtropical forests remains unclear. This study collected leaf and fine root samples of 81 arbuscular mycorrhizal (AM) tree species and 16 ectomycorrhizal (ECM) tree species from the forest dynamic monitoring sample plot in Heishiding Nature Reserve, located in Guangdong Province, and measured their C, N, and P concentrations to clarify the differences of the C, N, P stoichiometric characteristics in leaves and fine roots between AM and ECM tree species, and whether the C, N, P stoichiometric ratio in leaves and fine roots of AM and ECM tree species changes consistently.

Methods We calculated Blomberg’s K statistic to test phylogenetic signals, used the linear mixed model to test the differences in C, N and P concentrations and stoichiometric ratios of leaves and fine roots among different mycorrhizal species, and used the Pearson correlation coefficient to test the correlation between C, N and P concentrations and stoichiometric ratios in leaves and fine roots of different mycorrhizal species. Finally, we used standardised major axis regression to analyze the relationship of C, N and P concentrations and stoichiometric ratios between leaves and fine roots in different mycorrhizal species.

Important findings The P concentration in fine roots of AM species was higher than that of ECM species, but C:P was lower than that of ECM species. There was a significant positive correlation between the N and P concentrations, C:N and C:P in the leaves and fine roots of AM and ECM tree species. There was a significant correlation between the concentrations of C, N and P and stoichiometric ratios of leaves and fine roots in AM species, while there was a significant correlation between N concentration, C:N and N:P of leaves and fine roots in ECM species. The results of this study confirm that the colonization of mycorrhizal fungi affected the chemical element composition and stoichiometric ratio of plants, but the C, N and P stoichiometric ratios between leaves and fine roots in AM and ECM tree species were all significantly correlated.

Key words: arbuscular mycorrhizal fungi, ectomycorrhizal fungi, stoichiometric ratio, leaf, fine root