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dc.contributor.authorTorrecillas Melendreras, Arturo 
dc.contributor.authorGalego, R. 
dc.contributor.authorPérez Pastor, Alejandro 
dc.contributor.authorRuiz Sánchez, María C. 
dc.date.accessioned2009-05-25T08:32:56Z
dc.date.available2009-05-25T08:32:56Z
dc.date.issued2006-06
dc.identifier.citationTORRECILLAS, A, GALEGO. R., PÉREZ-PASTOR. A., RUIZ-SÁNCHEZ, M.C. Gas exchange and water relations of young apricot plants under drought conditions. Journal of Agricultural Science, 132 (4): 445-452 ,Junio 2006. ISSNes
dc.identifier.issn0021-8596
dc.description.abstractPotted 1.5-year-old apricot plants (Prunus armeniaca L.), growing under polycarbonate glasshouse conditions with a cooling system, were subjected to two successive water stress/recovery periods until pre-dawn leaf water potential (Ypd) reached values between -2.0 and -2.5 MPa, during summer 1996. Control plants were irrigated daily to maintain the soil matric potential at c. -20 kPa. Water stress limited plant growth and induced a significant reduction in leaf area, caused by mature leaf abscission. The parallel behaviour of leaf turgor potential and epinasty in stressed plants indicated that these movements are turgor-dependent. Osmotic adjustments of 0.27 and 0.60 MPa were observed at the end of the first and second stress period, respectively. Relative apoplastic water content (RWCa) values were high, ranging from 27 to 42%, and were not affected by water stress. The rapid decrease in leaf conductance (gl) from the beginning of the stress periods, together with the delay in stomatal reopening after rewatering the plants, indicated that stomatal behaviour was not a simple passive response to water deficits. Net photosynthesis decreased only at the end of both stress periods and recovered quickly. These observations indicate that leaf productivity may be affected only slightly by short-term water stress. The results indicate that drought resistance in apricot is based mainly on avoidance mechanisms, such as stomatal control, epinasty and limitation of transpiration by reducing leaf area. However, some tolerance characteristics, including osmotic adjustment, high RWCa and low leaf osmotic potential at turgor loss point (Ytlp) values were observed.es
dc.description.sponsorshipThe authors are grateful to J. Soto-Montesinos, M.D. Velasco, M. García and E. Nicolás for their assistance. The study was supported by CICYT (AMB95- 0071) and Consejería de Medio Ambiente, Agricultura y Agua de Murcia grants to the authors.es
dc.formatapplication/pdf
dc.language.isoenges
dc.publisherCambridge University Presses
dc.rightsThe original publication is available at http://journals.cambridge.org/action/search#es
dc.titleGas exchange and water relations of young apricot plants under drought conditionses
dc.typeinfo:eu-repo/semantics/articlees
dc.subjectApricot treeses
dc.subjectWater stresses
dc.subjectGlasshousees
dc.subjectCooling systemes
dc.subjectAlbaricoqueroes
dc.subjectEstrés hídricoes
dc.subjectInvernaderoes
dc.subjectSistema de refrigeraciónes
dc.subject.otherProducción Vegetales
dc.identifier.urihttp://hdl.handle.net/10317/983
dc.identifier.doi10.1017/S0021859699006577


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