Sorbitol and lithovit-guano25 mitigates the adverse effects of salinity on eggplant grown in pot experiment
¹Department of plant production, Faculty of Agriculture, Lebanese University, Beirut, Lebanon
²Department of Arid Land Agriculture, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 400, Al Ahsa 31982, Kingdom of Saudi Arabia
²University of Forestry, 10 Kliment Ohridski blvd, BG1797 Sofia, Bulgaria
⁴Department of Agricultural Biotechnology, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 420, Al Ahsa 31982, Kingdom of Saudi Arabia
This trial aimed to study the separate effects of nano-fertilizers and sugar alcohols in mitigating salt-stress on eggplant (Solanum melongena L) crop. For this purpose, two different concentrations of lithovit®-guano25 (A1:0.5 g L-1 and A2:1 g L-1) and sorbitol (B1:5 g L-1 and B2:10 g L-1) were sprayed on eggplant irrigated by three NaCl solutions (EC1:1.5 dS m-1, EC2:3 dS m-1 and EC3 6 dS m-1). Control plants were salt-stressed without any product. Results revealed an inhibitory effect of increasing in salt-stress on vegetative traits (plant height, leaf number, weights of plant parts and root mass fraction), reproductive traits (fruit number, fruit weight, yield plant-1, fruit diameter) and photosynthetic pigments. Control plants at EC6 had the highest cell electrolyte leakage (51.26%). Plant height and fruit number were maximized by A1 at all salinity levels. Additionally, A2 increased fruit weight by 89.98g, 85g and 92.3g compared to control respectively at 1.5, 3 and 6 dS m-1. Yield plant-1 increased by this treatment at all EC levels. At 3 and 6 dS m-1, A2-treated plants had the highest chlorophyll a (respectively 1.67 and 1.4mg g-1 fresh weight), total chlorophyll (respectively 2.38 and 1.9mg g-1 fresh weight) and carotenoids (respectively 193 and 172μg g-1 fresh weight) contents. A2-treated plants had the lowest cell electrolyte leakage at 1.5 dS m-1 (14.27%), 3 dS m-1 (25.31%) and 6 dS m-1 (37.78%). Treating plants with B1 and B2 maximized respectively fruit diameter at 1.5 dS m-1 and water content in all plant parts at 3 dS m-1. Both products helped plants reducing the adverse effects caused by salinity.