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	Responses of photosynthetic parameters to drought in subtropical forest ecosystem of China
	Zhou L.; Wang, S. Q.; Chi, Y. G.; Li, Q. K.; Huang, K.; Yu, Q. Z.
	2015
关键词	nitrogen-use efficiency mesophyll diffusion conductance electron-transport rate evergreen quercus-ilex net primary production water-use efficiency nonstomatal limitations leaf nitrogen biochemical limitations stomatal conductance
英文摘要	The mechanism underlying the effect of drought on the photosynthetic traits of leaves in forest ecosystems in subtropical regions is unclear. In this study, three limiting processes (stomatal, mesophyll and biochemical limitations) that control the photosynthetic capacity and three resource use efficiencies (intrinsic water use efficiency (iWUE), nitrogen use efficiency (NUE) and light use efficiency (LUE)), which were characterized as the interactions between photosynthesis and environmental resources, were estimated in two species (Schima superba and Pinus massoniana) under drought conditions. A quantitative limitation analysis demonstrated that the drought-induced limitation of photosynthesis in Schima superba was primarily due to stomatal limitation, whereas for Pinus massoniana, both stomatal and non-stomatal limitations generally exhibited similar magnitudes. Although the mesophyll limitation represented only 1% of the total limitation in Schima superba, it accounted for 24% of the total limitations for Pinus massoniana. Furthermore, a positive relationship between the LUE and NUE and a marginally negative relationship or trade-off between the NUE and iWUE were observed in the control plots. However, drought disrupted the relationships between the resource use efficiencies. Our findings may have important implications for reducing the uncertainties in model simulations and advancing the understanding of the interactions between ecosystem functions and climate change.
出处	Scientific Reports
卷	5
语种	英语
ISSN号	2045-2322
DOI标识	10.1038/srep18254
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43506]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhou L.,Wang, S. Q.,Chi, Y. G.,et al. Responses of photosynthetic parameters to drought in subtropical forest ecosystem of China. 2015.

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