Effect of Salicylic acid Application on Mitigating Impacts of Drought Stress in Marigold (Calendula officinalis L)
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
In order to evaluate the effect of various levels of drought stress on some growth and bio-chemical parameters of marigold (Calendula officinalis L.) and application of salicylic acid for mitigating drought impacts under greenhouse conditions, an experiment was conducted with a factorial arrangement based on completely randomized design with three replications at Research Greenhouse of Agricultural Faculty of Bardsir, Shahid Bahonar University of Kerman in 2015. The experimental treatments were different levels of drought stress at four levels (irrigation for fulfill of 100%, 75%, 50% and 25% of the field capacity) and foliar-application of salicylic acidat at five levels (0, 0.5, 1, 1.5 and 2 mM). The results showed that the irrigation levels had significant effect on all studied traits. The traits of dry weight, carotenoid contents, proline contents and soluble sugars were significantly affected by the salicylic acid treatment. Interaction of the irrigation and salicylic acid had significant effect on dry weight, proline contents and soluble sugars. The results showed that increase in drought stress caused to significant decreasing in growth parameters and also chlorophyll a and b contents. Contents of carotenoid, soluble sugars, proline and phenol were significantly increased by decreasing amount of irrigation water. Increase of salicylic acid to 1.5 mM increased the plant dry weight, carotenoid contents and soluble sugars relative to the control conditions. 2 mM salicylic acid decreased the traits compared to non- foliar application. Generally, the results showed that application of salicylic acid specially in 1.5 mM had a positive role in mitigation of negative effects of drought stress.
Language:
Persian
Published:
Journal of Water and Soil Science, Volume:28 Issue: 2, 2018
Pages:
15 to 28
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