Influence of Ionizing Radiation on Antioxidant Enzymes in Three Species of Trigonella
نویسنده
چکیده
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 Co 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.
منابع مشابه
The effect of Melatonin pretreatment on growth responses and enhancement of the enzyme's antioxidant system in Chlorella vulgaris under stress of ionizing radiation
Melatonin has important roles in many growth and stress-related responsive processes in plants and algae. In this study, the mediating role of 100 and 500 µM melatonin on photosynthetic pigments and non-enzymatic antioxidant responses of microalga, Chlorella vulgaris to gamma irradiation stress has been studied. The result showed that the alga treated with 100 µM had a stable amount of chloroph...
متن کاملComparative responses of two Trigonella species to salinity and drought stresses in vitro
Effects of salinity and drought on growth, contents of proline, malondialdehyde (MDA), proteinand activity of antioxidative enzymes were studied in two Trigonella species. Seeds andexplants of T. foenum-graecum and T. aphanoneura were grown on Murashige and Skoogmedium (MS) complemented with iso-osmotic concentrations of NaCl (0, 100, 150 mM) andmannitol (0, 180, 275 mM). Growth and relative wa...
متن کاملThe Evaluation of Melatonin Effect Against The Early Effect of Ionizing Radiation Induced Lung Injury
Background & Objective: Lung is a radiosensitive organ. Patients who are undergoing radiation therapy in their chest are subjected to radiation pneumonitis in the early phase and pulmonary fibrosis in the late one. Melatonin scavenges free radicals directly and acts as an indirect antioxidant through the activation of major antioxidant enzymes as well. The aim of the study thus is to investiga...
متن کاملAssessing the effect of dry season on the activity of antioxidant enzymes of three rangeland species in two southern regions of Iran
The production of various reactive oxygen species (ROS) is one of the effects of drought stress on plants. In order to combat with them, enzymatic antioxidant is presented in plant cells. In this study, the ability of adaptation of three native rangelands species (Taverniera cunifolia, Lycium shawii and Rhazya stricta) with multiple capabilities such as soil conservation, medicinal and orna...
متن کاملThe effect of Melatonin pretreatment on growth responses and enhancement of the enzymatic antioxidant system in Chlorella vulgaris under stress of ionizing radiation
Melatonin as a compound made by photosynthetic organizers protects them against many environmental stresses. Modulating mechanisms of melatonin, as a protector are not well known in early eukaryotes, such as algae. In this research, the effect of melatonin pre-treatment on evaluating Chlorella vulgaris resistance to gamma ionizing radiation was investigated. The results showed that 100 µM conce...
متن کامل