文献类型：期刊文献

英文题名：Mycorrhizal symbiosis pathway and edaphic fertility frame root economics space among tree species

作者：Yan, Han[1,2] Freschet, Gregoire T.[3] Wang, Huimin[1,2] Hogan, James Aaron[4,5] Li, Shenggong[1,2] Valverde-Barrantes, Oscar J.[4] Fu, Xiaoli[1,2] Wang, Ruili[6] Dai, Xiaoqin[1] Jiang, Lei[1] Meng, Shengwang[1] Yang, Fengting[1] Zhang, Miaomiao[7] Kou, Liang[1,2]

第一作者：Yan, Han

通信作者：Kou, L[1];Kou, L[2]

机构：[1]Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Res Stn, Beijing 100101, Peoples R China;[2]Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China;[3]CNRS, Stn Ecol Theor & Expt, 2 Route CNRS, F-09200 Moulis, France;[4]Florida Int Univ, Int Ctr Trop Biodivers, Inst Environm, Dept Biol Sci, Miami, FL 33199 USA;[5]Univ Florida, Dept Biol, Gainesville, FL 32605 USA;[6]Northwest A&F Univ, Coll Forestry, Yangling 712100, Shaanxi, Peoples R China;[7]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, State Key Lab Tree Genet & Breeding,State Forestr, Beijing 100091, Peoples R China

年份：2022

卷号：234

期号：5

起止页码：1639-1653

外文期刊名：NEW PHYTOLOGIST

收录：;Scopus(收录号：2-s2.0-85127947156);WOS:【SCI-EXPANDED(收录号:WOS:000780082400001)】；

基金：This research was financially supported by grants from the National Natural Science Foundation of China (nos. 31730014, 32071557, 41830646, 31700377). We are grateful to the editor Richard J. Norby and three anonymous reviewers for their helpful comments and suggestions.

语种：英文

外文关键词：absorptive root; arbuscular mycorrhizas and ectomycorrhizas; root economics; root trait variation; trait interplay; trait-function linkage

摘要：The root economics space (RES) is multidimensional and largely shaped by belowground biotic and abiotic influences. However, how root-fungal symbioses and edaphic fertility drive this complexity remains unclear. Here, we measured absorptive root traits of 112 tree species in temperate and subtropical forests of China, including traits linked to functional differences between arbuscular mycorrhizal (AM) and ectomycorrhizal (ECM) hosts. Our data, from known mycorrhizal tree species, revealed a 'fungal-symbiosis' dimension distinguishing AM from ECM species. This divergence likely resulted from the contrasting mycorrhizal evolutionary development of AM vs ECM associations. Increased root tissue cortical space facilitates AM symbiosis, whereas increased root branching favours ECM symbiosis. Irrespective of mycorrhizal type, a 'root-lifespan' dimension reflecting aspects of root construction cost and defence was controlled by variation in specific root length and root tissue density, which was fully independent of root nitrogen content. Within this function-based RES, we observed a substantial covariation of axes with soil phosphorus and nitrate levels, highlighting the role played by these two axes in nutrient acquisition and conservation. Overall, our findings demonstrate the importance of evolved mycorrhizal symbiosis pathway and edaphic fertility in framing the RES, and provide theoretical and mechanistic insights into the complexity of root economics.