Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/20070

Title: Leaf water potential and sap flow as indicators of water stress in Crimson ‘seedless’ grapevines under different irrigation strategies
Authors: Shahidian, Shakib
Valverde, Pedro
Coelho, Renato
Agulheiro-Santos, A.C.
Vaz, Margarida
Rato, A.E.
Serrano, João Manuel
Rodrigues, Sara
Editors: Habermann, Gustavo
Keywords: water
Granier
Table Grapes
Transpiration
Stomatal Conductance
Total soluble solids
Issue Date: Jun-2016
Publisher: Springer
Citation: Shahidian, S., Valverde, P., Coelho, R., Santos, A., Vaz, M., Rato, A., ... & Rodrigues, S. (2016). Leaf water potential and sap flow as indicators of water stress in Crimson ‘seedless’ grapevines under different irrigation strategies. Theoretical and Experimental Plant Physiology, 28(2), 221-239.
Abstract: Vitis vinifera L. cv. Crimson Seedless is a late season red table grape developed in 1989, with a high market value and increasingly cultivated under protected environments to extend the availability of seedless table grapes into the late fall. The purpose of this work was to evaluate leaf water potential and sap flow as indicators of water stress in Crimson Seedless vines under standard and reduced irrigation strategy, consisting of 70 % of the standard irrigation depth. Additionally, two sub-treatments were applied, consisting of normal irrigation throughout the growing season and a short irrigation induced stress period between veraison and harvest. Leaf water potential measurements coherently signaled crop-available water variations caused by different irrigation treatments, suggesting that this plant-based method can be reliably used to identify water-stress conditions. The use of sap flow density data to establish a ratio based on a reference ‘well irrigated vine’ and less irrigated vines can potentially be used to signal differences in the transpiration rates, which may be suitable for improving irrigation management strategies while preventing undesirable levels of water stress. Although all four irrigation strategies resulted in the production of quality table grapes, significant differences (p ≤ 0.05) were found in both berry weight and sugar content between the standard irrigation and reduced irrigation treatments. Reduced irrigation increased slightly the average berry size as well as sugar content and technical maturity index. The 2-week irrigation stress period had a negative effect on these parameters.
URI: http://link.springer.com/article/10.1007/s40626-016-0064-8
http://hdl.handle.net/10174/20070
ISSN: 2197-0025
Type: article
Appears in Collections:ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
ICAAM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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