title: Effects of warming on ectomycorrhizal colonization and nitrogen nutrition of Picea asperata seedlings grown in two contrasting forest ecosystems.
abstract: Ectomycorrhiza (ECM) plays an important role in plant nitrogen (N) nutrition and regulates plant responded to climate warming. We conducted a field experiment in a natural forest and a plantation in the eastern Tibetan Plateau to estimate the warming effects of open-top chambers (OTC) on ECM and N nutrition of Picea asperata seedlings. Four-year warming significantly decreased ECM colonization, ECM fungal biomass, fine root vigor, and the N concentration of leaf, stem and coarse root, but significantly increased fine root N concentration and N content of leaf, stem, fine root and whole plant in natural forest. Contrarily, warming induced no obvious change in most of these parameters in plantation. Moreover, warming decreased rhizospheric soil inorganic N content in both forests. Our results showed that four-year warming was not beneficial for ECM colonization of P. asperata seedlings in the two forests, and the seedlings in natural forest were more sensitive and flexible to experimental warming than in plantation. The changes of ECM colonization and fine root biomass for effective N uptake would be good for plant growth and remit N leaching under future warming in natural forest.
authors.affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization &Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, P. R. China.|College of Life Sciences, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu 610065, P. R. China.|University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, P. R. China.
authors.forename: Yuejiao
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization &Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, P. R. China.|University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, P. R. China.
authors.forename: Didi
authors.initials: D
authors.lastname: Sun
authors.affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization &Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, P. R. China.|State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Li
authors.affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization &Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, P. R. China.|Institute of Forest Ecology, Sichuan Agricultural University, Chengdu 611130, P. R. China.
authors.forename: Zhenfeng
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization &Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, P. R. China.
authors.forename: Chunzhang
authors.initials: C
authors.lastname: Zhao
authors.affiliation: College of Life Sciences, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu 610065, P. R. China.
authors.forename: Honghui
authors.initials: H
authors.lastname: Lin
authors.affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization &Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, P. R. China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Liu
mesh_terms: D018533:Biomass; D017753:Ecosystem; D065928:Forests; D038821:Mycorrhizae; D009584:Nitrogen; D028222:Picea / Q000254:growth & development* / Q000382:microbiology*; D018517:Plant Roots / Q000254:growth & development* / Q000382:microbiology*; D036226:Seedlings / Q000254:growth & development*; D012987:Soil
chemical_list: D012987:Soil; D009584:Nitrogen