Foliar stoichiometry under different mycorrhizal types in relation to temperature and precipitation in grassland  

作　　者：Zhaoyong Shi Xiaogai Hou Yinglong Chen Fayuan Wangan Yanfang Miao 

机构地区：[1]Agricultural College,Henan University of Science and Technology,Luoyang,Henan 471003,China [2]Laboratory for Earth Surface Processes,Ministry of Education,Peking University,Beijing 100871,China [3]College of Life Sciences,Hebei University,Baoding 071002,China [4]School of Earth and Environment,Faculty of Natural and Agricultural Sciences,The University of Western Australia,Perth,Australia

出　　处：《Journal of Plant Ecology》2013年第4期270-276,共7页植物生态学报（英文版）

基　　金：National Natural Science Foundation of China(grant 40971150);the Chinese Postdoctoral Science Foundation(20090450004,20103018);the open fund of Laboratory for Earth Surface Processes,Ministry of Education(2011004);the Science Foundation Fostering Innovative Ability of Henan University of Science and Technology(2009CZ0006).

摘　　要：Aims mycorrhizas play key roles in important ecosystem processes and functions.Carbon(C),nitrogen(N)and phosphorus(P)concentrations and their ratios are very important foliar traits and their cycling constrains most ecosystem processes.thus,this study addresses the influence of mycorrhizal strategies on these foliar nutrients and their response to climate change.Methods a new database was established including mycorrhizal types and leaf C_(mass),N_(mass),P_(mass),C:N and N:P of each plant species based on He et al.[(2008)leaf nitrogen:Phosphorus stoichiometry across Chinese grassland biomes.oecologia 155:301-10].the predomi-nant type of mycorrhizal association of each plant species was classified according to the published literature and our own obser-vations.We analyzed leaf C_(mass),N_(mass),P_(mass),C:N and N:P among 112 plant species in 316 samples of ascertained mycorrhizal type in the major grassland biomes of China.Important Findingsthe results show highly significant variation among different myc-orrhizal strategy types for foliar C_(mass),N_(mass) and N:P.the highest foliar C_(mass) was observed in ectotrophic mycorrhiza(ECM)type(469.8mg g1)followed by that in arbuscular mycorrhiza(AM)type(443.884 mg g1)and nonmycorrhizal(NM)type(434.0 mg g^(-1)).The foliar N concentration was significantly higher in NM type(31.0mg g^(-1)).However,the AM type had the greater C:N value(19)than the other types although less variation in C_(mass) and N:P among abuscular types on AM strategy was observed.Foliar traits showed significant variation in response to precipita-tion(mean growing season and annual precipitation(GSP and MAP))and temperature(mean growing season and annual tem-peratures(GST and MAT))depending on different mycorrhizal strategies and arbuscular types.When the responses of all folia parameters to precipitation and temperature were compared,the influence of GSP on leaf traits was greater than the influence of GST.

关 键 词：mycorrhizal strategy arbuscular type foliar traits precipitation temperature 

分 类 号：TG1[金属学及工艺—金属学]