Gas exchange and water relations of young apricot plants under drought conditions
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Knowledge AreaProducción Vegetal
SponsorsThe 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.
PublisherCambridge University Press
Bibliographic 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. ISSN
Sistema de refrigeración
Potted 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 ...
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