干旱区生态环境知识资源中心(Arid): Resorptions of 10 mineral elements in leaves of desert shrubs and their contrasting responses to aridity

Arid

	Resorptions of 10 mineral elements in leaves of desert shrubs and their contrasting responses to aridity
	Zhang Meixia; Luo Yan; Yan Zhengbing; Chen Jiao; Eziz Anwar; Li Kaihui; Han Wenxuan
来源期刊	Journal of Plant Ecology
ISSN	1752-9921
出版年	2019
卷号	12 期号:2 页码:358-366
英文摘要	Aims We aim to investigate variations in the resorption efficiencies of 10 mineral nutrients [i.e. nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), calcium (Ca), manganese (Mn), zinc (Zn), aluminum (Al), iron (Fe) and copper (Cu)] in leaves of desert shrubs and to explore effects of aridity on resorption efficiency of these nutrients. Methods Plant samples were collected from 10 sites in northern Xinjiang Uygur Autonomous Region of China. Samples of green and senesced leaves were analysed to determine concentrations of N, P, K, Mg, Ca, Mn, Zn, Al, Fe and Cu and thus the nutrient resorption efficiency. Important Findings The mean nutrient concentrations in the desert shrubs varied, with the stoichiometric ratio Ca:N (19.3 mg g~(-1)):K (10.5 mg g~(-1)):Mg:P (1.01 mg g~(-1)):Al:Fe:Mn:Zn:Cu (4.78 mg kg~(-1)) = 4038:2950:2199: 1816:211:37:32:11:2:1 in green leaves; and Ca:N (12.6 mg g~(-1)):Mg:K (7.6 mg g~(-1)):P (0.56 mg g~(-1)) :Fe:Al:Mn:Zn:Cu (2.85 mg kg~(-1)) = 5583:3710:2943:2523:178:133:119:19:3.7:1 in senesced leaves. Resorption generally occurred for six elements (N, P, K, Cu, Mg and Mn, with average resorption efficiency 47.8%, 52.0%, 38.6%, 41.0%, 12.7% and 7.89%, respectively) during leaf senescence, while the other four nutrients tended to accum umulate in senesced leaves, showing averagely negative resorption efficiencies [Ca (-3.87%), Al (-57.1%), Zn (-62.6%), Fe (-89.6%)]. Aridity showed strikingly different effects on the resorption process of the 10 nutri-ents. Of the four elements with totally (N/P/K) or mostly (Cu) posi-tive observations of resorption efficiency, their resorption generally decreased with aridity, suggesting that drought stress had negative effects on the resorption efficiencies of these elements. In contrast, with at least one-third observations of resorption efficiency being negative, the other elements (Mg/Mn/Ca/Zn/Al/Fe) showed gener-ally increasing resorptive tendency with aridity, except for Zn. This research provided a systematic analysis on the large variation and contrasting responses of the resorption of multi-elements to aridity in typical desert shrubs. Our findings foster the understanding of nutrient resorption patterns of desert plants and enable us to better predict the contrastive effects of drought stress on the cycling of diverse nutrients and the consequent stoichiometric decoupling in plants of desert ecosystems.
英文关键词	arid region desert shrubs drought stress mineral elements nutrient resorption stoichiometric decoupling
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6502286
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336118
作者单位	Zhang Meixia, Department of Ecology and Ecological Engineering, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.; Chen Jiao, Department of Ecology and Ecological Engineering, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.; Han Wenxuan, Department of Ecology and Ecological Engineering, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.; Luo Yan, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences;;Research Centre for Ecology & Environment of Central Asia, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology;;, Urumqi;;Urumqi, ;; 830011;;830011.; Li Kaihui, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences;;Research Centre for Ecology & Environment of Central Asia, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology;;, Urumqi;;Urumqi, ;; 830011;;830011.; ...
推荐引用方式 GB/T 7714	Zhang Meixia,Luo Yan,Yan Zhengbing,et al. Resorptions of 10 mineral elements in leaves of desert shrubs and their contrasting responses to aridity[J],2019,12(2):358-366.
APA	Zhang Meixia.,Luo Yan.,Yan Zhengbing.,Chen Jiao.,Eziz Anwar.,...&Han Wenxuan.(2019).Resorptions of 10 mineral elements in leaves of desert shrubs and their contrasting responses to aridity.Journal of Plant Ecology,12(2),358-366.
MLA	Zhang Meixia,et al."Resorptions of 10 mineral elements in leaves of desert shrubs and their contrasting responses to aridity".Journal of Plant Ecology 12.2(2019):358-366.