1st Central Asia Congress on Modern Agricultural Tecniques and Plant Nutrient, Bishkek- Krygyzstan, Bishkek, Kyrgyzstan, 1 - 03 October 2013, vol.2, pp.43-50
The effect of calcium [Ca(NO3)2 and CaCl2] on yield and some physiological attributes [leaf relative water content (RWC), chlorophyll, carotenoid, proline, and lipid peroxidase] of two different statice cultivars (Limonium sinuatum ‘Compindi White’ and ‘Compindi Deep Blue’) grown in containers under salinity conditions were investigated. Statice plants were subjected to three saline soils [0.085 (control), 0.308 and 0.674 % total salt] and four calcium treatments [0, 400, 800 and 1200 ppm). Additional nutrient requirements of the plant were supplied by Hoagland solution (excluding Ca). Nutrient solution was applied once every two week. pH and EC values of the solution were maintained between 6-7 and 1.5-2 mS/cm. A statistical difference was not observed between the treatments in terms of yield in both statice cultivars. Increased salt values, decreased the number of flower per plant according to control. RWC, total chlorophyll and carotenoid values were decreased under salt stress conditions in both cultivars compared with their own controls. Proline and lipid peroxidase activities were increased by increasing salt stress. Supplemental calcium added to nutrient solution significantly improved physiological attributes affected by salt stress. RWC, total chlorophyll and carotenoid content of leaf increased, but Proline and lipid peroxidase content of leaf samples decreased with increasing Ca doses. The results of the present study suggest that calcium applications on nutrient solution can be used as a strategy in order to increase tolerance against saline conditions in statice cultivars.