干旱区生态环境知识资源中心(Arid): Responses of leaf C:N:P stoichiometry to water supply in the desert shrub Zygophyllum xanthoxylum

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DOI	10.1111/plb.12897
	Responses of leaf C:N:P stoichiometry to water supply in the desert shrub Zygophyllum xanthoxylum
	Niu, D.1; Zhang, C.1; Ma, P.1; Fu, H.1; Elser, J. J.2,3
通讯作者	Niu, D.
来源期刊	PLANT BIOLOGY
ISSN	1435-8603
EISSN	1438-8677
出版年	2019
卷号	21 期号:1 页码:82-88
英文摘要	Based on the elemental composition of major biochemical molecules associated with different biological functions, the 'growth rate hypothesis' proposed that organisms with a higher growth rate would be coupled to lower C:N, especially lower C:P and N:P ratios. However, the applicability of the growth rate hypothesis for plants is unclear, especially for shrubs growing under different water supply. We performed an experiment with eight soil moisture levels (soil water content: 4%, 6%, 8%, 13%, 18%, 23%, 26% and 28%) to evaluate the effects of water availability on leaf C:N:P stoichiometry in the shrub Zygophyllum xanthoxylum. We found that leaves grew slowly and favored accumulation of P over C and N under both high and low water supply. Thus, leaf C:P and N:P ratios were unimodally related to soil water content, in parallel with individual leaf area and mass. As a result, there were significant positive correlations between leaf C:P and N:P with leaf growth (u). Our result that slower-growing leaves had lower C:P and N:P ratios does not support the growth rate hypothesis, which predicted a negative association of N:P ratio with growth rate, but it is consistent with recent theoretical derivations of growth-stoichiometry relations in plants, where N:P ratio is predicted to increase with increasing growth for very low growth rates, suggesting leaf growth limitation by C and N rather than P for drought and water saturation.
英文关键词	Individual leaf area and mass individual leaf growth rate leaf stoichiometry nitrogen:phosphorus ratio water supply
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000453080700009
WOS关键词	N-P STOICHIOMETRY ; GROWTH-RATE ; MINERAL-NUTRITION ; PLANTS ; NITROGEN ; DROUGHT ; SOIL ; STRATEGIES ; RESORPTION ; TOLERANCE
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	兰州大学 ; Arizona State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218007
作者单位	1.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Minist Agr & Rural Affairs, State Key Lab Grassland Agroecosyst,Key Lab Grass, Lanzhou, Gansu, Peoples R China; 2.Univ Montana, Flathead Lake Biol Stn, Polson, MT 59860 USA; 3.Arizona State Univ, Sch Life Sci, Tempe, AZ USA
推荐引用方式 GB/T 7714	Niu, D.,Zhang, C.,Ma, P.,et al. Responses of leaf C:N:P stoichiometry to water supply in the desert shrub Zygophyllum xanthoxylum[J]. 兰州大学, Arizona State University,2019,21(1):82-88.
APA	Niu, D.,Zhang, C.,Ma, P.,Fu, H.,&Elser, J. J..(2019).Responses of leaf C:N:P stoichiometry to water supply in the desert shrub Zygophyllum xanthoxylum.PLANT BIOLOGY,21(1),82-88.
MLA	Niu, D.,et al."Responses of leaf C:N:P stoichiometry to water supply in the desert shrub Zygophyllum xanthoxylum".PLANT BIOLOGY 21.1(2019):82-88.