NDLI: Can water responses in Stipa tenacissima L. during the summer season be promoted by non-rainfall water gains in soil?

Content Provider	Springer Nature Link
Author	Ramírez, David A. Bellot, Juan Domingo, Francisco Blasco, Adela
Copyright Year	2006
Abstract	This article reports on quantified soil water gains and their possible effects on summer water relationships in a semiarid Stipa tenacissima L. grasslands located in SE Spain. We believe that the net soil water gains detected using minilysimeters could be from soil water vapour adsorption (WVA). Our study of high water-stress showed stomatal conductance (21.8–43.1 mmol H$_{2}$O m$^{−2}$ s$^{−1}$) in S. tenacissima leaves unusual for the summer season, and the evapotranspiration from S. tenacissima grassland, estimated by a multi-source sparse evapotranspiration model, closely corresponding to total WVA. This highlights the importance of summer soil WVA to stomatal conductance and vital transpiration in S. tenacissima. This study measured pre-dawn leaf water potential (ψ) response to sporadic light rainfall, finding that a light summer rainfall (1.59 mm day$^{−1}$) was sufficient to vary ψ in S. tenacissima from −3.8 (close to the turgour loss point) to −2.7 MPa. We hypothesize that soil WVA can supply vegetation with water vital to its survival in seasons with a severe water deficit, giving rise to a close relationship between soil water dynamics and plant water response.
Starting Page	67
Ending Page	79
Page Count	13
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	291
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-12-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Evapotranspiration Leaf water potential Minilysimeter Soil water vapour adsorption Stipa tenacissima Stomatal conductance Ecology Plant Physiology Soil Science & Conservation Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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