Effect of drought stress on the activity of antioxidant enzymes and soluble sugars content of Pe-nnyroyal (Mentha pulegium L.)

Authors

Abstract
Pennyroyal (Mentha pulegium L.) from the Lamiaceae family is a medicinal plant which has great antioxidant properties. Environmental stresses such as drought can result in changes in the activity of antioxidant enzymes and the content of some biochemical factors in plants. In this investigation, the effects of drought stress on the activity of supe-roxide dismutase, ascorbate peroxidase, catalase, peroxidase, malondialdehyde and soluble sugars content in pennyroyal shoots and roots were evaluated. To create the water deficit, 24-day seedlings of pennyroyal were placed in 1/2 strength Hoagland solution, containing PEG 6000 (0 and 5% (w/v)) for 24 hours. The results showed that drought stress incr-eased catalase activity and lipid peroxidation and decreased superoxide dismutase and peroxidase activity of the shoots. On the other hand, the activity of catalase and peroxidase increased in the roots. Ascorbate peroxidase activity showed no significant difference in the shoots and the roots. Moreover, drought stress significantly increased the amount of so-luble sugars of glucose, galactose, xylose and rhamnosus in the shoots. Therefore, the increased activity in antioxidant enzymes as well as the amount of soluble sugars under drought stress might be a sign of tolerance of M. pulegium under low levels of drought.

Keywords


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Volume 3, Issue 3 - Serial Number 9
Autumn 2016
Pages 228-237

  • Receive Date 08 June 2026
  • Publish Date 08 June 2026