气候变化领域集成服务门户(CCPortal): Nitrogen nutrition addition mitigated drought stress by improving carbon exchange and reserves among two temperate trees

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DOI	10.1016/j.agrformet.2021.108693
	Nitrogen nutrition addition mitigated drought stress by improving carbon exchange and reserves among two temperate trees
	Zhang, Hongxia; Li, Xinrong; Guan, Dexin; Wang, Anzhi; Yuan, Fenghui; Wu, Jiabing
通讯作者	Li, XR (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Donggang West Rd 320, Lanzhou 730000, Peoples R China. ; Guan, DX (通讯作者)，Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
发表日期	2021
ISSN	0168-1923
EISSN	1873-2240
卷号	311
英文摘要	Climate change-driven increases in drought and atmospheric nitrogen (N) deposition frequency and severity across the world, and these changes have profound impacts on forest dynamics by affecting tree carbon balance. However, important knowledge gaps persist concerning the interactions between drought and N enrichment on carbon supply and reserve dynamics. We investigated gas exchange and carbohydrate reserve shifts and associated with leaf chemical composition across two temperate tree saplings coping with different levels of drought stress, N nutrition addition and their interactions. Our results showed that drought stress decreased net photo-synthetic rate (A) and stomatal conductance (gs), while A and gs were increased by N addition, combined with increased gs under the interactive effects of drought and N addition, indicating that N nutrient availability had suppressing effect on drought stress and improved the drought-induced negative conditions by altering carbon exchange traits. In addition, we found that N addition reduced the concentrations of nonstructural carbohydrate (NSC) and its components in relation to foliar carbon and nitrogen changes and the fast growth of saplings. Under the interaction of drought and N nutrition addition, no variation in carbohydrate concentrations demonstrate that carbon reserves play a critical role in regulating carbon exchange and growth. Our observations provide evidence of N nutrient availability mitigated drought stress by improving carbon exchange and reserves, which is expected to contribute to the predictions of future vegetation dynamics.
关键词	LEAF HYDRAULIC CONDUCTANCE GAS-EXCHANGE WATER RELATIONS CARBOHYDRATE DYNAMICS FUNCTIONAL TRAITS ELEVATED CO2 GROWTH SEEDLINGS PHOTOSYNTHESIS COORDINATION
英文关键词	Drought stress; Gas exchange; Interactive effects; Nitrogen deposition; Non-structural carbohydrates
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000717360500010
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254013
作者单位	[Zhang, Hongxia; Li, Xinrong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Donggang West Rd 320, Lanzhou 730000, Peoples R China; [Zhang, Hongxia; Guan, Dexin; Wang, Anzhi; Yuan, Fenghui; Wu, Jiabing] Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, 72 Wenhua Rd, Shenyang 110016, Peoples R China; [Zhang, Hongxia] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hongxia,Li, Xinrong,Guan, Dexin,et al. Nitrogen nutrition addition mitigated drought stress by improving carbon exchange and reserves among two temperate trees[J]. 中国科学院西北生态环境资源研究院,2021,311.
APA	Zhang, Hongxia,Li, Xinrong,Guan, Dexin,Wang, Anzhi,Yuan, Fenghui,&Wu, Jiabing.(2021).Nitrogen nutrition addition mitigated drought stress by improving carbon exchange and reserves among two temperate trees.AGRICULTURAL AND FOREST METEOROLOGY,311.
MLA	Zhang, Hongxia,et al."Nitrogen nutrition addition mitigated drought stress by improving carbon exchange and reserves among two temperate trees".AGRICULTURAL AND FOREST METEOROLOGY 311(2021).