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Article

Rootstock Effects on Water Relations of Young Almond Trees (cv. Soleta) When Subjected to Water Stress and Rehydration

1
Instituto Tecnológico Agrario de Castilla y León, Ctra, Burgos km 119, 47071 Valladolid, Spain
2
Dipartimento di Scienze Agro Ambientali e Territoriali (DiSAAT), Università degli Studi di Bari Aldo Moro, Via Giovanni Amendola 165/A, 70126 Bari, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(12), 3319; https://doi.org/10.3390/w12123319
Received: 9 November 2020 / Revised: 18 November 2020 / Accepted: 23 November 2020 / Published: 26 November 2020
(This article belongs to the Special Issue Research on Irrigation Strategies for Sustainable Water Management)
Rootstocks with size controlling potential are being used in newly planted intensive almond orchards. Due to increased water scarcity, characterizing the response of these rootstocks to water deficit is required. The current work aims to assess whether the rootstock can improve their drought tolerance. We investigated the morphological and physiological response of P. dulcis “Soleta” either self-rooted or grafted on Rootpac-20 rootstock. Plant responses were evaluated during a water stress period (withholding irrigation for 20 days) and subsequent recovery in potted plants under greenhouse conditions. Self-rooted plants had a higher capacity to control vigour than plants grafted onto Rootpac-20, both under full irrigation and no irrigation conditions. Stressed plants exhibited severe dehydration, as indicated by lower leaf water potential and relative water content. Removing irrigation reduced stomatal conductance in grafted and self-rooted plants by a similar extent, suggesting an efficient stomatal control, while the reduction in the net photosynthesis rate was more marked in grafted plants compared to non-grafted plants. Self-rooted plants under water stress increased their root to shoot ratio and water use efficiency, which are positive aspects for growth and survival of these plants. View Full-Text
Keywords: Prunus dulcis; evapotranspiration; gas exchange; self-rooted; high density plantings; water use efficiency; grafting Prunus dulcis; evapotranspiration; gas exchange; self-rooted; high density plantings; water use efficiency; grafting
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MDPI and ACS Style

Álvarez, S.; Martín, H.; Barajas, E.; Rubio, J.A.; Vivaldi, G.A. Rootstock Effects on Water Relations of Young Almond Trees (cv. Soleta) When Subjected to Water Stress and Rehydration. Water 2020, 12, 3319. https://doi.org/10.3390/w12123319

AMA Style

Álvarez S, Martín H, Barajas E, Rubio JA, Vivaldi GA. Rootstock Effects on Water Relations of Young Almond Trees (cv. Soleta) When Subjected to Water Stress and Rehydration. Water. 2020; 12(12):3319. https://doi.org/10.3390/w12123319

Chicago/Turabian Style

Álvarez, Sara; Martín, Hugo; Barajas, Enrique; Rubio, José A.; Vivaldi, Gaetano A. 2020. "Rootstock Effects on Water Relations of Young Almond Trees (cv. Soleta) When Subjected to Water Stress and Rehydration" Water 12, no. 12: 3319. https://doi.org/10.3390/w12123319

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