English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/166895
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Responses of transpiration and transpiration efficiency of almond trees to moderate water deficits

AuthorsEspadafor, Mónica; Orgaz Rosua, Francisco ; Testi, Luca ; Lorite, Ignacio J. ; González-Dugo, María P.; Fereres Castiel, Elías
Tree transpiration
Transpiration efficiency
Water deficits
Stem water potential
Issue Date18-Nov-2017
CitationScientia Horticulturae 225: 6- 4 (2017)
AbstractThe majority of world almond acreage is grown under rainfed conditions but most of the production is obtained under irrigation. Increased water scarcity is reducing water availability for irrigation thus the need to characterize the responses of almond to water deficits. Several works have defined well the stomatal closure in almond leaves under water deficits, but the behavior at the canopy level is not well understood. A field experiment was conducted in an almond (cv. Guara) orchard in Córdoba (Spain) under four different levels of irrigation supply to investigate the responses of almond tree transpiration (T) and transpiration efficiency (TE) to water stress. Stem water potential (Ψx), whole tree transpiration (T) and leaf gas-exchange were periodically measured throughout the 2013 growing season. Tree T decreased linearly as midday Ψx decreased below a threshold value of about −1.1 MPa, and declined to about 50% of the Control value when midday Ψx reached −1.6 MPa. The quick decline in T in response to the lowering of ψx suggests a high sensitivity of almond T to water deficits. The instantaneous transpiration efficiency (TE) of almond leaves was unaffected by water and varied essentially with vapor pressure deficits. On a daily scale, the leaf TE of stressed trees followed the same pattern as in the non-stressed trees. Then, contrary to the behavior observed in olive and citrus, there were no instantaneous or daily TE increments in almond trees in response to water deficits.
Publisher version (URL)https://doi.org/10.1016/j.scienta.2017.06.028
Appears in Collections:(IAS) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.