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

Journal of Plant Ecology 2013年第4期6卷 270-276页

作者： Zhaoyong Shi Xiaogai Hou Yinglong Chen Fayuan Wangan Yanfang Miao Agricultural College Henan University of Science and TechnologyLuoyangHenan 471003China Laboratory for Earth Surface Processes Ministry of EducationPeking UniversityBeijing 100871China College of Life Sciences Hebei UniversityBaoding 071002China School of Earth and Environment Faculty of Natural and Agricultural SciencesThe University of Western AustraliaPerthAustralia

Aims mycorrhizas play key roles in important ecosystem processes and ***(C),nitrogen(N)and phosphorus(P)concentrations and their ratios are very important foliar traits and their cycling constrains most ecosystem ***,this study addresses the influence of mycorrhizal strategies on these foliar nutrients and their response to climate *** 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 *** 155:301-10].the predomi-nant type of mycorrhizal association of each plant species was classified according to the published literature and our own *** 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 *** Findingsthe results show highly significant variation among different myc-orrhizal strategy types for foliar C_(mass),N_(mass) and N:*** 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 *** 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 *** 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

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