Articles
WALNUT (J. REGIA) SEEDLING RESPONSES TO DIFFERENT LEVELS OF NACL IN IRRIGATION WATER.
Article number
311_24
Pages
191 – 200
Language
Abstract
The effects of different NaCl levels in irrigation water in container grown walnut (J. Regia, cv "Serr") seedlings were studied by controlling leaf gas exchange parameters, vegetative growth, water consumption and plant chemical composition.
Net CO2 assimilation rate (A), stomatal conductance (gs) and transpiration rate (E) decreased as NaCl was augmented, however internal CO2 concentration (Ci) increased as the NaCl concentration went up.
A straight inverse relationship has been found between NaCl treatments and most of the vegetative growth and visual parameters (leaf area, leaf necrotic area, dry weight of different parts of the plant, shoot diameter, …). Container water consumption was also related to NaCl treatments and it seems to be a good and easy indicator of plant-container stress.
Plant chemical composition showed a rapid Na+ and Cl– accumulation in leaves.
Ca++ content was inversely related to the presence of NaCl.
Walnut seedlings are highly sensitive to NaCl, and it is possible to detect plant damage even with very low (3 meq/l) NaCl concentrations in irrigation water.
Net CO2 assimilation rate (A), stomatal conductance (gs) and transpiration rate (E) decreased as NaCl was augmented, however internal CO2 concentration (Ci) increased as the NaCl concentration went up.
A straight inverse relationship has been found between NaCl treatments and most of the vegetative growth and visual parameters (leaf area, leaf necrotic area, dry weight of different parts of the plant, shoot diameter, …). Container water consumption was also related to NaCl treatments and it seems to be a good and easy indicator of plant-container stress.
Plant chemical composition showed a rapid Na+ and Cl– accumulation in leaves.
Ca++ content was inversely related to the presence of NaCl.
Walnut seedlings are highly sensitive to NaCl, and it is possible to detect plant damage even with very low (3 meq/l) NaCl concentrations in irrigation water.
Publication
Authors
J. Girona, M. Cohen, I. Rodriguez, M. Mata
Keywords
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