Effect Of Drought Stress And Priming With Salicylic Acid On Growth And Morphological Properties Of Black Cumin (Nigella sativa L.)

Abstract

One of the biological methods for increasing the production in agriculture is spraying with natural hormones, such as salicylic acid which increases Growth and yield of plants. In order to investigate the Effects of drought stress and Nigella sativa seeds with salicylic acid pretreatment on growth and development, the Morphological features of Nigella Sativa plants in research greenhouse of agriculture faculty of Shahid Bahonare Kerman University have been tested in fall of 2013, according to the Factorial design in randomized complete block design with three replications. The first factor was the level of stress, without stress (90%, Field capacity), the average stress (75%, Field capacity), severe stress (50%, Field capacity) and the other factor was four concentrations of salicylic acid (Mili molar) including: Zero Mm (Hydro priming water), 0.25 Mm, 0.75 Mm and 1 Mm Salicylic acid for Nigella sativa seed priming. The results showed that Drought had a significant effect (p<=0.05) on The number of leaves, leaf area index, plant height, root length, leaf relative water content (RWC), During the secondary roots, the number of secondary roots, fresh and dry weight plant and the ratio of root length to stem length ( Shoot/root ). Moreover, Salicylic acid has a significant effect ( p<=0.05) on Plant height, number of the leaves, leaf area index, leaf relative water content (RWC), the ratio of root length to stem length (Shoot/root), shoot dry weight and root length minor. the interaction of Salicylic acid and drought stress on trait (Shoot/root ) was significant. Generally, in this research, it has been determined that the average concentration of salicylic acid (0.75 Mm) can modify the effects of the drought and Increase performance in many of the traits.