(2017). Antioxidant Responses of Helianthus annuus L. under Vanadium Stress. Masoumeh Abedini1*, Fatemeh Mohammadian1, Behrokh Daie-Hassani1 and Leila Zarandi-Miandoab2. Plant Physiology, 8(1), 2239-2245. doi: 10.22034/ijpp.2017.539067
. "Antioxidant Responses of Helianthus annuus L. under Vanadium Stress. Masoumeh Abedini1*, Fatemeh Mohammadian1, Behrokh Daie-Hassani1 and Leila Zarandi-Miandoab2". Plant Physiology, 8, 1, 2017, 2239-2245. doi: 10.22034/ijpp.2017.539067
(2017). 'Antioxidant Responses of Helianthus annuus L. under Vanadium Stress. Masoumeh Abedini1*, Fatemeh Mohammadian1, Behrokh Daie-Hassani1 and Leila Zarandi-Miandoab2', Plant Physiology, 8(1), pp. 2239-2245. doi: 10.22034/ijpp.2017.539067
Antioxidant Responses of Helianthus annuus L. under Vanadium Stress. Masoumeh Abedini1*, Fatemeh Mohammadian1, Behrokh Daie-Hassani1 and Leila Zarandi-Miandoab2. Plant Physiology, 2017; 8(1): 2239-2245. doi: 10.22034/ijpp.2017.539067
Antioxidant Responses of Helianthus annuus L. under Vanadium Stress. Masoumeh Abedini1*, Fatemeh Mohammadian1, Behrokh Daie-Hassani1 and Leila Zarandi-Miandoab2
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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