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Hajlaoui H, Maatallah S, Guizani M, Boughattas NEH, Guesmi A, Ennajeh M, Dabbou S, Lopez-Lauri F. Effect of Regulated Deficit Irrigation on Agronomic Parameters of Three Plum Cultivars (Prunus salicina L.) under Semi-Arid Climate Conditions. PLANTS 2022; 11:plants11121545. [PMID: 35736696 PMCID: PMC9229321 DOI: 10.3390/plants11121545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/02/2022] [Accepted: 05/04/2022] [Indexed: 11/16/2022]
Abstract
Regulated deficit irrigation (RDI) strategies may greatly contribute to save irrigation water, especially in low water availability conditions. The effects of RDI on the growth process, photosynthesis, fruit yield, and some quality traits were assessed for two years on three plum (Prunus salicina Lindl.) cultivars (‘Black Diamond’, ‘Black Gold’ and ‘Black Star’) grown in Midwest Tunisia. The experiment was conducted during two successive seasons (2011–2012). Two water regimes were applied per cultivar during the phase of fruit growth until fruit ripening. Stressed trees receive 50% of the amount of irrigation compared to controls (CI). Several eco-physiological parameters and some pomological criteria were measured, based on the climatic condition (ETo, ETc, and VDP). Results showed that the three cultivars had an aptitude for tolerance for moderate stress with varying degrees of response time to drought stress. Globally, a slight decrease in the gas exchange rate (AN and gs) and the water status (RWC, Ψmin, and Ψos) was registered. Tree yields, size and weight show a slight decrease under water stress. Nevertheless, there was an improvement in the total soluble solid content (SSC) and firmness in same cultivars. Our results proved that the Black Star cultivar was the most tolerant to deficit irrigation, in reason that it maintains a good water status and a high photosynthetic activity.
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Affiliation(s)
- Hichem Hajlaoui
- Regional Center for Agricultural Research of Sidi Bouzid, Sidi Bouzid 9100, Tunisia; (H.H.); (S.M.); (A.G.)
- Laboratory of Non-Conventional Water Valuation (INRGREF), University of Carthage, Carthage 1054, Tunisia
| | - Samira Maatallah
- Regional Center for Agricultural Research of Sidi Bouzid, Sidi Bouzid 9100, Tunisia; (H.H.); (S.M.); (A.G.)
- Laboratory of Non-Conventional Water Valuation (INRGREF), University of Carthage, Carthage 1054, Tunisia
| | - Monia Guizani
- Regional Center for Agricultural Research of Sidi Bouzid, Sidi Bouzid 9100, Tunisia; (H.H.); (S.M.); (A.G.)
- Laboratory of Non-Conventional Water Valuation (INRGREF), University of Carthage, Carthage 1054, Tunisia
- Correspondence:
| | - Nour El Houda Boughattas
- Laboratory of Remote Sensing and Information Systems with Spatial Reference (LTSIRS), National Engineering School of Tunis (ENIT), University of Tunis El Manar, Tunis 1068, Tunisia;
| | - Anis Guesmi
- Regional Center for Agricultural Research of Sidi Bouzid, Sidi Bouzid 9100, Tunisia; (H.H.); (S.M.); (A.G.)
- Laboratory of Non-Conventional Water Valuation (INRGREF), University of Carthage, Carthage 1054, Tunisia
| | - Mustapha Ennajeh
- Unit of Biodiversity Research and Valorisation of Bioressources in Arid Regions, Faculty of Science of Gabes, University of Gabes, Cité Irriadh-Zrig, Gabès 6072, Tunisia;
| | - Samia Dabbou
- Unit of Bioactive and Natural Substances and Biotechnology UR17ES49, Dentistry Faculty, University of Monastir, Monastir 5000, Tunisia;
| | - Félicie Lopez-Lauri
- UMR 95 Qualisud, Laboratory of Physiology of Fruits and Vegetables—Campus Agroparc, University of Avignon Pole Agrosciences, 301 Baruch Spinoza Street, 84916 Avignon, France;
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