Abstract
A pot-culture experiment was conducted to estimate the ameliorating effect of triazole compounds Hexaconazole, Tebuconazole and Propiconazole on drought stress in sunflower (Helianthus annuus L.). The plants were subjected to drought (DID) stress after four days of interval from the 30th day of sowing (DAS). One-day-interval irrigation was kept as control. The plant samples were collected and separated into root, stem and leaf for estimating the amino acid (AA), proline (PRO) and glycine betaine (GB) contents and the activities of antioxidant enzymes. Drought stress and triazole treatments increased AA, PRO and GB contents, superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT) activities when compared to control. From the results of this investigation, it can be concluded that the application of triazole compounds,caused a partial amelioration of the adverse effects of drought stress by its influence on antioxidant potentials in H. annuus.
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