干旱区生态环境知识资源中心(Arid): Fundamental intra-specific differences in plant-water relations in a widespread desert shrub (Artemisia tridentata)

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DOI	10.1007/s11258-020-01051-y
	Fundamental intra-specific differences in plant-water relations in a widespread desert shrub (Artemisia tridentata)
	Sharma, Harmandeep 1,2; Reinhardt, Keith 1; Lohse, Kathleen A.1
通讯作者	Sharma, Harmandeep
来源期刊	PLANT ECOLOGY
ISSN	1385-0237
EISSN	1573-5052
出版年	2020
卷号	221 期号:10 页码:925-938
英文摘要	Big sagebrush (Artemisia tridentata) is a widespread and locally dominant shrub that is a key driver of water fluxes and storage in western North America. There are several recognized subspecies of big sagebrush that occupy different microsites across the landscape according to moisture availability, yet little is known about how these subspecies vary in drought tolerance or water management strategies. We measured diurnal and seasonal (i.e., early-, mid-, and late summer) variation in water status and transport efficiency, transpiration, and stomatal regulations in two subspecies of big sagebrush (A.t. wyomingensis and A.t. vaseyana) at the Reynolds Creek Critical Zone Observatory in southwestern Idaho. We hypothesized that water status, transport efficiency, and stomatal regulations would be greater in A.t. vaseyana compared to A.t. wyomingensis, because the first subspecies occupies wetter microsites. Predawn and midday water potentials were up to 2x more negative in A.t. wyomingensis compared to A.t. vaseyana, and transpiration was up to similar to 4x greater in A.t. vaseyana compared to A.t. wyomingensis. A.t. vaseyana was more isohydric with similar to 1.5x greater stomatal sensitivity to atmospheric vapor pressure deficit and a smaller hydroscape, compared to A.t. wyomingensis. Our data demonstrate that there are fundamental differences in plant-water relations among these subspecies that constitute the vast, but not homogeneous sagebrush landscapes. These important differences can have implications for modeling water fluxes in big sagebrush-dominated communities at shrub to ecosystem scales.
英文关键词	Stomatal regulation Transpiration Hydraulic conductivity Wyoming big sagebrush Mountain big sagebrush Sap flux
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000544545800002
WOS关键词	STOMATAL CONDUCTANCE RESPONSE ; PACIFIC-NORTHWEST ; GROWTH-RATE ; SAGEBRUSH ; SOIL ; LEAF ; TRANSPIRATION ; PRECIPITATION ; POSTFIRE ; PATTERNS
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319728
作者单位	1.Idaho State Univ, Dept Biol Sci, 650 Mem Dr, Pocatello, ID 83209 USA; 2.North Carolina Agr & Tech State Univ, Dept Nat Resources & Environm Design, 1601 East Market St, Greensboro, NC 27411 USA
推荐引用方式 GB/T 7714	Sharma, Harmandeep,Reinhardt, Keith,Lohse, Kathleen A.. Fundamental intra-specific differences in plant-water relations in a widespread desert shrub (Artemisia tridentata)[J],2020,221(10):925-938.
APA	Sharma, Harmandeep,Reinhardt, Keith,&Lohse, Kathleen A..(2020).Fundamental intra-specific differences in plant-water relations in a widespread desert shrub (Artemisia tridentata).PLANT ECOLOGY,221(10),925-938.
MLA	Sharma, Harmandeep,et al."Fundamental intra-specific differences in plant-water relations in a widespread desert shrub (Artemisia tridentata)".PLANT ECOLOGY 221.10(2020):925-938.