Zhou Zhe, Chen Binzhou, Zhao Hongru, Yi Junjie, Liu Shiqiang, Tie Dan, Xu Jinshi, Hu Shu, Guo Yaoxin, Yue Ming
Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Northwest University, Xi'an 710069, China.
Plants (Basel). 2022 Dec 15;11(24):3543. doi: 10.3390/plants11243543.
Increasingly, tropical studies based on aboveground traits have suggested that lianas have a more acquisitive strategy than trees, thereby possibly explaining the increase in lianas relative to trees in many tropical forests under global change. However, few studies have tested whether this pattern can be extended to root traits and temperate forests. In this study, we sampled 61 temperate liana-host tree pairs and quantified 11 commonly studied functional traits representative of plant economics in roots, stems, and leaves; we aimed to determine whether root, stem and leaf traits are coordinated across lifeforms, and whether temperate lianas are also characterized by more fast and acquisitive traits than trees. Our results showed that leaf and stem traits were coordinated across lifeforms but not with root traits, suggesting that aboveground plant economics is not always correlated with belowground economics, and leaf and stem economic spectra cannot be expanded to the root directly. Compared with host trees, lianas had more acquisitive leaf and stem traits, such as higher specific leaf area and lower leaf dry matter content, leaf carbon content, leaf mass per area, and wood density, suggesting that lianas have a more acquisitive strategy than host trees in the temperate forest. The differences between lianas and trees in plant strategy may drive their contrasting responses to the changing temperate forest environment under global change.
越来越多基于地上性状的热带研究表明，藤本植物比树木具有更强的获取资源策略，这可能解释了在全球变化背景下，许多热带森林中藤本植物相对于树木数量增加的现象。然而，很少有研究测试这种模式是否能扩展到根系性状和温带森林。在本研究中，我们对61对温带藤本植物 - 寄主树进行了采样，并量化了11个常用于研究的代表植物根、茎、叶经济学特征的功能性状；我们旨在确定根、茎和叶性状在不同生命形式间是否协调，以及温带藤本植物是否也具有比树木更多快速获取资源的性状。我们的结果表明，叶和茎性状在不同生命形式间是协调的，但与根性状不协调，这表明地上植物经济学并不总是与地下经济学相关，并且叶和茎的经济谱不能直接扩展到根。与寄主树相比，藤本植物具有更多获取资源的叶和茎性状，如更高的比叶面积、更低的叶片干物质含量、叶片碳含量、单位面积叶质量和木材密度，这表明在温带森林中藤本植物比寄主树具有更强的获取资源策略。藤本植物和树木在植物策略上的差异可能导致它们在全球变化下对温带森林环境变化的不同响应。
