Research Article Open Access

Influence of Ionizing Radiation on Antioxidant Enzymes in Three Species of Trigonella

Muna M. Al-Rumaih and May M. Al-Rumaih


The response of three species of Trigonella, namely, Trigonella stellata, Trigonella hamosa and Trigonella anguina to gamma irradiation stress was investigated with respect to antioxidant enzyme induction. When dry seeds were subjected to gamma rays (0, 40, 60, 80, 100 Krad) from a cobalt source 60Co at a dose rate of 233.5 rad/ min, a dose dependent increase in the activities of ascorbate peroxidase (APOX), superoxide dismutase (SOD) and glutathione reductase (GR) was observed in both shoots and roots of the studied species. On the contrary, catalase activity was repressed, particularly at the higher applied doses. Shoots were more significantly affected by irradiation than roots. The three species differed in their radio-sensitivity with respect to the characters concerned. Changes in the activity of the key antioxidant enzymes which confer tolerance to irradiation stress were discussed.

American Journal of Environmental Sciences
Volume 4 No. 2, 2008, 151-156


Submitted On: 4 October 2007 Published On: 30 April 2008

How to Cite: Al-Rumaih, M. M. (2008). Influence of Ionizing Radiation on Antioxidant Enzymes in Three Species of Trigonella. American Journal of Environmental Sciences, 4(2), 151-156.

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  • antioxidant enzymes
  • ascorbate peroxidase
  • superoxide dismutase
  • glutathione reductase
  • catalase
  • irradiation
  • gamma
  • stress