EFFECT OF NACL SALINITY ON PROLINE, STOMATAL RESISTANCE, LAR AND RWC IN FIVE OLIVE CULTIVARS
Salinity is one of major obstacle to spread olive cultivation in some part of Iran. In order to study the effect of sodium chloride (NaCl) on proline concentration, stomatal resistance, leaf area ratio (LAR) and relative water content (RWC) of 5 olive cultivars, an experiment was conducted in split-plot based on complete randomized design with three replications. In this study the main factor was NaCl level including 4 levels (0, 25, 50 and 100 mM NaCl) and sub factor, 5 olive cultivars (Dezfuli, Conservalia, Fishomi, Zard, and Manzanila). Uniform, 1-year-old own-rooted plants were planted in 20 L pots containing sand-perlite mixture (1:1) and were irrigated with half-strength Coic solution. The experiment was run for 5 months. Proline was measured with Nin Hydrin method and stomatal resistance was measured with prometer. There was an insignificant increasing proline concentration with increasing NaCl levels. However, the proline content was same in all cultivar. Stomatal resistance was significantly increased under salt stress and Dezfuli demonstrated the lowest change in stomatal resistance as compared with other cultivars. LAR decreased with increasing NaCl levels. The result indicate that Dezfuli was most tolerance to salinity and stomatal resistance might be to used as a suitable index to screen olive tolerance to salinity stress.
Rezaei, M., Lessani, H., Talaei, A. and Babalar, M. (2008). EFFECT OF NACL SALINITY ON PROLINE, STOMATAL RESISTANCE, LAR AND RWC IN FIVE OLIVE CULTIVARS. Acta Hortic. 774, 419-424
stomatal resistance, RWC, LAR, olive, salt stress