干旱区生态环境知识资源中心(Arid): Increased carbon uptake under elevated CO2 concentration enhances water-use efficiency of C4 broomcorn millet under drought

Arid

DOI	10.1016/j.agwat.2020.106631
	Increased carbon uptake under elevated CO2 concentration enhances water-use efficiency of C4 broomcorn millet under drought
	Zhang, Dongsheng; Li, Ali; Lam, Shu Kee; Li, Ping; Zong, Yuzheng; Gao, Zhiqiang; Hao, Xingyu
通讯作者	Hao, XY (corresponding author), Shanxi Agr Univ, Coll Agr, Taigu 030801, Shanxi, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	245
英文摘要	Broomcorn millet (Panicum miliaceum L.) has been cultivated in arid or semi-arid area due to its high drought tolerance. Yet information on how elevated atmospheric CO2 concentration ([CO2]) affects the responses to drought of the productivity, photosynthesis, water-use efficiency and drought tolerance of broomcorn millet is lacking. We investigated the effects of elevated [CO2] and drought on gas exchange parameters, water-use efficiency, physiological indices related to drought tolerance, leaf area and aboveground biomass of broomcorn millet using an open-top chamber experimental facility in North China in 2015 and 2016. Broomcorn millet was grown in pots with or without drought stress under ambient or elevated [CO2]. Elevated [CO2] could compensate the negative effect of drought on the leaf area and aboveground biomass of broomcorn millet. This was attributed to the direct stimulation in photosynthesis due to increased carbon uptake under elevated [CO2]. Elevated [CO2] significantly enhanced the water-use efficiency of broomcorn millet at both leaf and plant levels, especially under drought condition. Elevated [CO2] did not significantly affect evapotranspiration, but increased water-use efficiency at the plant level by 15% (2015) and 35% (2016) of broomcorn millet under drought. Elevated [CO2] did not significantly affect PSII efficiency, antioxidative defense capacity (peroxidase, malondialdehyde) or osmotic adjustment (soluble sugar content and proline). We conclude that elevated [CO2]-induced increase in carbon uptake and water-use efficiency would increase the productivity of broomcorn millet in semi-arid areas under future high-CO2 climate.
英文关键词	Antioxidative defense ability Chlorophyll content Evapotranspiration Fluorescence Photosynthesis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000606745700005
WOS关键词	MAX L. MERR. ; ATMOSPHERIC CO2 ; C-4 PHOTOSYNTHESIS ; WINTER-WHEAT ; STRESS ; GROWTH ; YIELD ; NITROGEN ; LEAF ; ULTRASTRUCTURE
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347642
作者单位	[Zhang, Dongsheng; Li, Ali; Li, Ping; Zong, Yuzheng; Gao, Zhiqiang; Hao, Xingyu] Shanxi Agr Univ, Coll Agr, Taigu 030801, Shanxi, Peoples R China; [Lam, Shu Kee] Univ Melbourne, Fac Vet & Agr Sci, Sch Agr & Food, Melbourne, Vic 3010, Australia
推荐引用方式 GB/T 7714	Zhang, Dongsheng,Li, Ali,Lam, Shu Kee,et al. Increased carbon uptake under elevated CO2 concentration enhances water-use efficiency of C4 broomcorn millet under drought[J],2021,245.
APA	Zhang, Dongsheng.,Li, Ali.,Lam, Shu Kee.,Li, Ping.,Zong, Yuzheng.,...&Hao, Xingyu.(2021).Increased carbon uptake under elevated CO2 concentration enhances water-use efficiency of C4 broomcorn millet under drought.AGRICULTURAL WATER MANAGEMENT,245.
MLA	Zhang, Dongsheng,et al."Increased carbon uptake under elevated CO2 concentration enhances water-use efficiency of C4 broomcorn millet under drought".AGRICULTURAL WATER MANAGEMENT 245(2021).