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Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland

文献类型：期刊论文

作者Cao, Jirong; Yang, Liuyi2; Pang, Shuang2; Yang, Junjie; Hu, Yecui3; Li, Yuncong4; Li, Linghao; Wang, Qibing
刊名ENVIRONMENTAL AND EXPERIMENTAL BOTANY
出版日期2021
卷号185
ISSN号0098-8472
关键词N-15 tracer Nitrogen uptake Nitrogen addition frequency Nitrogen form Nitrate Ammonium Free amino acid Semiarid grasslands
DOI10.1016/j.envexpbot.2021.104412
文献子类Article
英文摘要Nitrogen (N) deposition can significantly alter plant diversity and soil N status and cycling. However, there is rare information about the responses of plant N uptake of coexisting species to N deposition, which could facilitate the understanding of these N-induced ecosystem changes, particularly when taking N addition frequency into consideration. We assessed the uptake rates of N of various chemical forms (both inorganic and organic N) among coexisting plant species in response to N enrichment, using in situ stable isotope labeling techniques (N-15-labeled ammonium, N-15-labeled nitrate and C-13-N-15-labeled glycine), through a long-term N deposition experiment with monthly and biannual N addition frequencies in a temperate grassland. The plants of all three targeted species took up much greater inorganic N than amino acid N (93.4-99.4 % vs. 0.6-6.6 % in relative contributions to the total N uptake). The most abundant soil N form that originally was NH4+, was shifted to be NO3- under low and moderate N additions and back to be NH4+ at high addition level. Plants of not only dominant but also minor species predominantly took up N from the most abundant soil N form along N addition gradient. The dominant species Leymus chinensis, which continued to maintain its dominance under N enrichment, exhibited the ability to capture N of all different forms to tolerate and survive in a wide range of soil N environments. In contrast, another dominant species Stipa grandis, which was losing its dominance with N addition, showed the acquisition capacity of single N form in response to increased N inputs. It should be noted that there were interaction effects of N addition frequency and level on plant N uptake rates. Plant N uptake patterns and acquisition strategies could have important consequences for changes in ecosystem biodiversity and function under current and future N deposition scenarios.
学科主题Plant Sciences ; Environmental Sciences
电子版国际标准刊号1873-7307
出版地OXFORD
WOS关键词AMINO-ACIDS ; NICHE COMPLEMENTARITY ; ECOSYSTEM RESPONSES ; INORGANIC NITROGEN ; SOIL MICROBES ; DEPOSITION ; PLASTICITY ; DIVERSITY ; PREFERENCES ; COMPETITION
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000642458900006
资助机构National Key RD Program [2016YFC0500702] ; National Natural Science Foundation of China [41977046, 31470006] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23080402]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/26759]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Florida, Trop Res & Educ Ctr, Soil & Water Sci Dept, Homestead, FL 33031 USA
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.China Univ Geosci, Sch Land Sci & Technol, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Cao, Jirong,Yang, Liuyi,Pang, Shuang,et al. Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2021,185.
APA Cao, Jirong.,Yang, Liuyi.,Pang, Shuang.,Yang, Junjie.,Hu, Yecui.,...&Wang, Qibing.(2021).Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,185.
MLA Cao, Jirong,et al."Convergent nitrogen uptake patterns and divergent nitrogen acquisition strategies of coexisting plant species in response to long-term nitrogen enrichment in a temperate grassland".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 185(2021).

入库方式： OAI收割

来源：植物研究所

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