Water stress preconditioning to improve drought resistance in young apricot plants
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AuthorRuiz Sánchez, María C.; Domingo Miguel, Rafael; Torrecillas Melendreras, Arturo; Pérez Pastor, Alejandro
Research GroupGrupo de investigación Suelo-agua-planta
Knowledge AreaProducción Vegetal
SponsorsThe authors are grateful to R. Galego, A. Jiménez, M. García y J. Soto their collaboration. The study was supported by CICYT (HID1999-0951 and HID96-1342-C04-03) grants to the authors.
Bibliographic CitationRUIZ SÁNCHEZ, M.C., DOMINGO, R., TORRECILLAS, A., PÉREZ PASTOR, A. Water stress preconditioning to improve drought resistance in young apricot plants. Plant Science , 156 (2): 245-251, 28 de Julio de 2000. ISSN: 0168-9452
Endurecimiento de plantas
The effect of water stress preconditioning was studied in 1-year-old apricot plants (Prunus armeniaca L., cv. Búlida). Plants were submitted to different treatments, T-0 (control treatment) and T-1, drip irrigated daily; T-2 and T-3, irrigated daily at 50% and 25% of T-0, respectively; T-4 and T-5, irrigated to field capacity every 3 and 6 days, respectively. After 30 days, irrigation was withheld for 10 days, maintaining the T-0 treatment irrigated daily. After this period, the plants were re-irrigated to run-off and treated as control treatment. The stomatal closure and epinasty observed in response to water stress represented adaptive mechanisms to drought, allowing the plants to regulate water loss more effectively and prevent leaf heating. A substantial reduction in the irrigation water supplied combined with a high frequency of application (T-3 treatment) promoted plant hardening; the plants enduring drought better, due to their greater osmotic adjustment (0.77 MPa), which prevented ...
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