Abedini, M., Fatemeh Mohammadian, F., Daie-Hassani, B., Zarandi-Miandoab, L. (2017). Antioxidant Responses of Helianthus annuus L. under Vanadium Stress.. Plant Physiology, 8(1), 2239-2245. doi: 10.22034/ijpp.2017.539067
Masoumeh Abedini; Fatemeh Mohammadian Fatemeh Mohammadian; Behrokh Daie-Hassani; Leila Zarandi-Miandoab. "Antioxidant Responses of Helianthus annuus L. under Vanadium Stress.". Plant Physiology, 8, 1, 2017, 2239-2245. doi: 10.22034/ijpp.2017.539067
Abedini, M., Fatemeh Mohammadian, F., Daie-Hassani, B., Zarandi-Miandoab, L. (2017). 'Antioxidant Responses of Helianthus annuus L. under Vanadium Stress.', Plant Physiology, 8(1), pp. 2239-2245. doi: 10.22034/ijpp.2017.539067
Abedini, M., Fatemeh Mohammadian, F., Daie-Hassani, B., Zarandi-Miandoab, L. Antioxidant Responses of Helianthus annuus L. under Vanadium Stress.. Plant Physiology, 2017; 8(1): 2239-2245. doi: 10.22034/ijpp.2017.539067
Antioxidant Responses of Helianthus annuus L. under Vanadium Stress.
1Faculty of Basic Sciences, Payame Noor University, Iran
2Department of Biology, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
Abstract
Vanadium (V) is a transition metal consistently distributed in the Earth’s crust. At trace concentrations, it has been described as a beneficial element for some organisms; however, it is toxic at higher concentrations. This study was conducted hydroponically in a complete randomized design to investigate effects of V (0, 3.25, 7.5, and 15 mg L-1) on antioxidant system of sunflower. Results showed that all applied concentrations of V significantly decreased the plant growth, but increased the free amino acids, proline, malondialdehyde and H2O2 contents of plants. The antioxidant enzymes activities increased in response to the increase in V concentration. The activity of (Guaiacol) peroxidase showed a significant increase at 15 mg L-1 V while the activities of catalase, glutathione reductase, and ascorbate peroxidase decreased significantly by application of V. There was a slight increase in the superoxide dismutase activity at different concentrations of V.The study concludes that the applied concentrations of V induced oxidative stress in sunflower and (Guaiacol) peroxidase was a more effective antioxidant enzyme in scavenging the free radicals in this plant.
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