干旱区生态环境知识资源中心(Arid): Foliar water uptake in arid ecosystems: seasonal variability and ecophysiological consequences

Arid

DOI	10.1007/s00442-020-04673-1
	Foliar water uptake in arid ecosystems: seasonal variability and ecophysiological consequences
	Cavallaro, Agustin 1,2,3; Silleta, Luisina Carbonell 1,2,3; Pereyra, Daniel A.1,2,3; Goldstein, Guillermo 4,5; Scholz, Fabian G.1,2,3; Bucci, Sandra J.1,2,3
通讯作者	Bucci, Sandra J.
来源期刊	OECOLOGIA
ISSN	0029-8549
EISSN	1432-1939
出版年	2020
卷号	193 期号:2 页码:337-348
英文摘要	Foliar water uptake (FWU) has been reported for different species across several ecosystems types. However, little attention has been given to arid ecosystems, where FWU during dew formation or small rain events could ameliorate water deficits. FWU and their effects on leaf water potential (psi(Leaf)) were evaluated in grasses and shrubs exploring different soil water sources in a Patagonian steppe. Also, seasonal variability in FWU and the role of cell wall elasticity in determining the effects on psi(Leaf) were assessed. Eleven small rain events (< 8 mm) and 45 days with dew formation were recorded during the study period. All species exhibited FWU after experimental wetting. There was a large variability in FWU across species, from 0.04 mmol m(-2) s(-1) in species with deep roots to 0.75 mmol m(-2) s(-1) in species with shallow roots. Species-specific mean FWU rates were positively correlated with mean transpiration rates. The increase in psi(Leaf) after leaf wetting varied between 0.65 MPa and 1.67 MPa across species and seasons. The effects of FWU on psi(Leaf) were inversely correlated with cell wall elasticity. FWU integrated over both seasons varied between 28 mol m(-2) in species with deep roots to 361 mol m(-2) in species with shallow roots. Taking into account the percentage of coverage of each species, accumulated FWU represented 1.6% of the total annual transpiration of grasses and shrubs in this ecosystem. Despite this low FWU integrated over time compared to transpiration, wetting leaves surfaces can help to avoid larger water deficit during the dry season.
英文关键词	Rooting depth Cell wall elasticity Leaf water potential Transpiration Rain pulse Dew formation
类型	Article
语种	英语
国家	Argentina ; USA
收录类别	SCI-E
WOS记录号	WOS:000536435600001
WOS关键词	SEMPERVIRENS D. DON ; PLANT CUTICLES ; ROOTING DEPTH ; FOG WATER ; SOIL ; ABSORPTION ; DROUGHT ; FOREST ; DESERT ; VOLUME
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319195
作者单位	1.Consejo Nacl Invest Cient & Tecn, GEBEF, Inst Biociencias Patagonia INBIOP, RA-9000 Comodoro Rivadavia, Argentina; 2.UNPSJB, RA-9000 Comodoro Rivadavia, Argentina; 3.UNPSJB, Fac Ciencias Nat & Ciencias Salud, RA-9000 Comodoro Rivadavia, Argentina; 4.Univ Buenos Aires, Lab Ecol Func, IEGEBA, CONICET, RA-1428 Buenos Aires, DF, Argentina; 5.Univ Miami, Dept Biol, Coral Gables, FL 33124 USA
推荐引用方式 GB/T 7714	Cavallaro, Agustin,Silleta, Luisina Carbonell,Pereyra, Daniel A.,et al. Foliar water uptake in arid ecosystems: seasonal variability and ecophysiological consequences[J],2020,193(2):337-348.
APA	Cavallaro, Agustin,Silleta, Luisina Carbonell,Pereyra, Daniel A.,Goldstein, Guillermo,Scholz, Fabian G.,&Bucci, Sandra J..(2020).Foliar water uptake in arid ecosystems: seasonal variability and ecophysiological consequences.OECOLOGIA,193(2),337-348.
MLA	Cavallaro, Agustin,et al."Foliar water uptake in arid ecosystems: seasonal variability and ecophysiological consequences".OECOLOGIA 193.2(2020):337-348.