Responses of Woody Plant Functional Traits to Nitrogen Addition: A Meta-Analysis of Leaf Economics, Gas Exchange, and Hydraulic Traits

doi:10.3389/fpls.2018.00683

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	Responses of Woody Plant Functional Traits to Nitrogen Addition: A Meta-Analysis of Leaf Economics, Gas Exchange, and Hydraulic Traits
	Zhang, Hongxia 1,2; Li, Weibin 3; Adams, Henry D.4; Wang, Anzhi 1; Wu, Jiabing 1; Jin, Changjie 1; Guan, Dexin 1; Yuan, Fenghui 1
刊名	FRONTIERS IN PLANT SCIENCE
	2018-05-23
卷号	9 页码:10
关键词	atmospheric nitrogen deposition hydraulic conductance intrinsic water-use efficiency leaf area index leaf economic traits meta-analysis
ISSN号	1664-462X
DOI	10.3389/fpls.2018.00683
通讯作者	Guan, Dexin(dxguan@iae.ac.cn) ; Yuan, Fenghui(fhyuan@iae.ac.cn)
英文摘要	Atmospheric nitrogen (N) deposition has been found to significantly affect plant growth and physiological performance in terrestrial ecosystems. Many individual studies have investigated how N addition influences plant functional traits, however these investigations have usually been limited to a single species, and thereby do not allow derivation of general patterns or underlying mechanisms. We synthesized data from 56 papers and conducted a meta-analysis to assess the general responses of 15 variables related to leaf economics, gas exchange, and hydraulic traits to N addition among 61 woody plant species, primarily from temperate and subtropical regions. Results showed that under N addition, leaf area index (+10.3%), foliar N content (+7.3%), intrinsic water-use efficiency (+3.1%) and net photosynthetic rate (+16.1%) significantly increased, while specific leaf area, stomatal conductance, and transpiration rate did not change. For plant hydraulics, N addition significantly increased vessel diameter (+7.0%), hydraulic conductance in stems/shoots (+6.7%), and water potential corresponding to 50% loss of hydraulic conductivity (P-50, +21.5%; i.e., P-50 became less negative), while water potential in leaves (-6.7%) decreased (becamemore negative). N addition had little effect on vessel density, hydraulic conductance in leaves and roots, or water potential in stems/shoots. N addition had greater effects on gymnosperms than angiosperms and ammonium nitrate fertilization had larger effects than fertilization with urea, and high levels of N addition affected more traits than low levels. Our results demonstrate that N addition has coupled effects on both carbon and water dynamics of woody plants. Increased leaf N, likely fixed in photosynthetic enzymes and pigments leads to higher photosynthesis and water use efficiency, which may increase leaf growth, as reflected in LAI results. These changes appear to have downstream effects on hydraulic function through increases in vessel diameter, which leads to higher hydraulic conductance, but lower water potential and increased vulnerability to embolism. Overall, our results suggest that N addition will shift plant function along a tradeoff between C and hydraulic economies by enhancing C uptake while simultaneously increasing the risk of hydraulic dysfunction.
资助项目	National Natural Science Foundation of China[31670707] ; National Natural Science Foundation of China[31770755] ; National Natural Science Foundation of China[41675112] ; National Natural Science Foundation of China[31400541]
WOS研究方向	Plant Sciences
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000432772300001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/128151]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guan, Dexin; Yuan, Fenghui
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, Shenyang, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland & Agroecosyst, Key Lab Grassland Livestock Ind Innovat,Minist Ag, Lanzhou, Gansu, Peoples R China 4.Oklahoma State Univ, Dept Plant Biol Ecol & Evolut, Stillwater, OK 74078 USA
推荐引用方式 GB/T 7714	Zhang, Hongxia,Li, Weibin,Adams, Henry D.,et al. Responses of Woody Plant Functional Traits to Nitrogen Addition: A Meta-Analysis of Leaf Economics, Gas Exchange, and Hydraulic Traits[J]. FRONTIERS IN PLANT SCIENCE,2018,9:10.
APA	Zhang, Hongxia.,Li, Weibin.,Adams, Henry D..,Wang, Anzhi.,Wu, Jiabing.,...&Yuan, Fenghui.(2018).Responses of Woody Plant Functional Traits to Nitrogen Addition: A Meta-Analysis of Leaf Economics, Gas Exchange, and Hydraulic Traits.FRONTIERS IN PLANT SCIENCE,9,10.
MLA	Zhang, Hongxia,et al."Responses of Woody Plant Functional Traits to Nitrogen Addition: A Meta-Analysis of Leaf Economics, Gas Exchange, and Hydraulic Traits".FRONTIERS IN PLANT SCIENCE 9(2018):10.