ISHS Acta Horticulturae 791: V International Symposium on Olive Growing
INFLUENCE OF SALINITY ON SOME PHYSIOLOGICAL PARAMETERS IN LEAVES OF YOUNG OLIVE PLANTS |
| Authors: | A. Mousavi, H. Lessani, M. Babalar, A. Talaie |
| Keywords: | olive (Olea europaea L.), salinity, NaCl, chlorophyll, water potential, soluble sugar, mineral elements |
| Abstract:
In order to study the effects of salinity (NaCl) on olive plants and experiment was conducted factorial based in completely randomized design (CRD) with three replications and 10 treatments in a greenhouse of the Horticultural Department of the Agricultural College of Tehran University. In this experiment, one year-old plants of two Iranian olive cultivars 'Roghani' and 'Zard' planted in plastic pots (10 L) with equal ratio of a sand-perlite mixture and treated with different concentrations (0, 40, 80, 120 and 160 mM NaCl) of sodium chloride plus Hoagland’s solution for 150 days. The results showed that with increasing of salinity to 40 mM NaCl, the content of chlorophylls (a), (b) and (a+b) were reduced significantly. There was no difference between cultivars for chlorophylls (b) and (a+b) but 'Roghani' showed more decrease in content of chlorophyll (a) than ‘Zard’. With increasing of salinity to 80 mM, NaCl the content of total soluble sugars increased but with additional increase of salinity, total soluble sugars content decreased. Under influence of salinity stress, leaf water potential significantly reduced but there was no difference between cultivars. With increasing of salinity to 80 mM NaCl, the Na and Cl contents and Na/K ratio were gradually increased and K, Ca, P and N contents decreased. With further increase of salinity, the amounts of Na, Cl and Na/K ratio severely increased and the amount of K decreased. With increasing of salinity, the K, Mg, Ca, P and N in leaf were reduced significantly. Under salinity stress conditions, cultivar 'Roghani' showed a higher increase in Na and Cl contents and more decrease in Mg and K contents than cultivar 'Zard' but the cultivars did not differ significantly in Ca, N and P contents in the leaves. | |
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