Foliar Application of Salicylic Acid and Glycine Betaine improve Antioxidant Enzymes and Biochemical Characteristics of Potato Cultivars
Journal Title: Journal of Agriculture, Food, Environment and Animal Sciences - Year 2022, Vol 3, Issue 2
Abstract
This experiment was conducted to evaluate the response of potato plants to water deficit and foliar application of salicylic acid (SA) and glycine betaine (GB). Potato cultivars were grown in pots and subjected to two irrigation regimes (30 and 60% depletion of available soil water) and three independent levels of both SA (0.0, 0.5 and 1.0 mM) and GB (0.0, 1.0 and 2.0 mM). Activities of superoxide dismutase, catalase, peroxidase, proline, photosynthesis, total chlorophyll, carotenoid along with plant dry mass and tuber yield were measured. Drought significant effects on all traits. Drought tolerance was determined as increasing in antioxidant enzymes, proline and by calculating the stress susceptibility index (SSI). As well, drought tolerant cultivars (Spirit and Born) revealed higher accumulation of proline content, carotenoid and antioxidant enzymes activities. Also, the minimum values of SSI were observed in tolerant cultivars. However, foliar applied SA and GB affected the activities of antioxidant enzymes and increased proline content, photosynthesis, total chlorophyll, carotenoid, PDM (plant dry mass) and TY (tuber yield). The range of the increases seemed more when potato cultivars were grown under water deficit conditions. All the above effects aided the PDM and TY of potato cultivars to increase by increasing SA and GB in most levels and led to the supposition that external spray of SA and GB could be improved the growth and enabled potato cultivars to withstand water deficit. Also, under 60% depletion of available soil water, the SA effects were clearer on all traits as compared with their controls and applied GB.
Authors and Affiliations
Mouhamad ALHOSHAN, Morteza ZAHEDI
Keywords
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