Gas exchange and water relations of young apricot plants under drought conditions
Área de conocimiento
Producción VegetalPatrocinadores
The 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.Fecha de publicación
2006-06Editorial
Cambridge University PressCita bibliográfica
TORRECILLAS, 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. ISSNPalabras clave
Apricot treesWater stress
Glasshouse
Cooling system
Albaricoquero
Estrés hídrico
Invernadero
Sistema de refrigeración
Resumen
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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