Physiological responses of two moss species to the combined stress of water deficit and elevated N deposition (II): Carbon and nitrogen metabolism

doi:10.1002/ece3.2521

	Physiological responses of two moss species to the combined stress of water deficit and elevated N deposition (II): Carbon and nitrogen metabolism
	Liu, Bin-yang ; Lei, Chun-yi ; Jin, Jian-hua ; Guan, Yi-yun ; Li, Shan ; Zhang, Yi-shun ; Liu, Wei-qiu
	2016
发表期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
卷号	6 期号:21 页码:7596-7609
摘要	Nitrogen (N) deposition levels and frequencies of extreme drought events are increasing globally. In efforts to improve understanding of plants' responses to associated stresses, we have investigated responses of mosses to drought under elevated nitrogen conditions. More specifically, we exposed Pogonatum cirratum subsp. fuscatum and Hypnum plumaeforme to various nitrate (KNO3) or ammonium (NH4Cl) treatments, with and without water deficit stress and monitored indices related to carbon (C) and N metabolism both immediately after the stress and after a short recovery period. The results show that N application stimulated both C and N assimilation activities, including ribulose-1,5-bisphosphate carboxylase, glutamine synthetase/glutamate synthase (GS/GOGAT), and glutamate dehydrogenase (GDH) activities, while water deficit inhibited C and N assimilation. The mosses could resist stress caused by excess N and water deficit by increasing their photorespiration activity and proline (Pro) contents. However, N supply increased their sensitivity to water stress, causing sharper reductions in C and N assimilation rates, and further increases in photorespiration and Pro contents, indicating more serious oxidative or osmotic stress in the mosses. In addition, there were interspecific differences in N assimilation pathways, as the GS/GOGAT and GDH pathways were the preferentially used ammonium assimilation pathways in P.cirratum and H.plumaeforme when stressed, respectively. After rehydration, both mosses exhibited overcompensation effects for most C and N assimilation activities, but when supplied with N, the activities were generally restored to previous levels (or less), indicating that N supply reduced their ability to recover from water deficit stress. In conclusion, mosses can tolerate a certain degree of water deficit stress and possess some resilience to environmental fluctuations, but elevated N deposition reduces their tolerance and ability to recover.
关键词	carbon metabolism compensation effect drought moss nitrogen nitrogen assimilation stress
学科领域	Ecology ; Evolutionary Biology
DOI	10.1002/ece3.2521
收录类别	SCI
语种	英语
WOS关键词	SUCROSE-PHOSPHATE SYNTHASE ; AMINO-ACID ACCUMULATION ; RACOMITRIUM-LANUGINOSUM ; BRASSICA-JUNCEA ; DROUGHT STRESS ; PHOTOSYSTEM-II ; PROLINE ; PLANTS ; DESICCATION ; BRYOPHYTES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000387120800004
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31070470, 31370490] ; National Ministry of Science and Technology of ChinaMinistry of Science and Technology, China [2013FY111500]
作者邮箱	lsslwq@mail.sysu.edu.cn
作品OA属性	Green Published, gold
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25134
专题	植被与环境变化国家重点实验室
作者单位	1.[Liu, Bin-yang 2.Jin, Jian-hua 3.Guan, Yi-yun 4.Li, Shan 5.Zhang, Yi-shun 6.Sun Yat Sen Univ, Guangdong Key Lab Plant Resources, Sch Life Sci, Guangzhou, Guangdong, Peoples R China 7.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing, Peoples R China 8.Heishiding Nat Reserve Guangdong Prov, Zhaoqing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Bin-yang,Lei, Chun-yi,Jin, Jian-hua,et al. Physiological responses of two moss species to the combined stress of water deficit and elevated N deposition (II): Carbon and nitrogen metabolism[J]. ECOLOGY AND EVOLUTION,2016,6(21):7596-7609.
APA	Liu, Bin-yang.,Lei, Chun-yi.,Jin, Jian-hua.,Guan, Yi-yun.,Li, Shan.,...&Liu, Wei-qiu.(2016).Physiological responses of two moss species to the combined stress of water deficit and elevated N deposition (II): Carbon and nitrogen metabolism.ECOLOGY AND EVOLUTION,6(21),7596-7609.
MLA	Liu, Bin-yang,et al."Physiological responses of two moss species to the combined stress of water deficit and elevated N deposition (II): Carbon and nitrogen metabolism".ECOLOGY AND EVOLUTION 6.21(2016):7596-7609.

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