Silicon increases boron tolerance and reduces oxidative damage of wheat grown in soil with excess boron
Gunes, A.,Ankara Univ. (Turkey). Dept. of Soil Science and Plant Nutrition | Inal, A.,Ankara Univ. (Turkey). Dept. of Soil Science and Plant Nutrition | Bagci, E.G.,Ankara Univ. (Turkey). Dept. of Soil Science and Plant Nutrition | Coban, S.,Ankara Univ. (Turkey). Dept. of Soil Science and Plant Nutrition | Sahin, O.,Ankara Univ. (Turkey). Dept. of Soil Science and Plant Nutrition
The effect of silicon on the growth, boron concentrations, malondialdehyde (MDA) content, lipoxygenase (LOX) activity, proline (PRO) and H2O2 accumulation, and the activities of major antioxidant enzymes [superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX)] and non-enzymatic antioxidants (AA) of wheat grown in soil originally with toxic B concentrations were investigated. Application of 5.0 and 10.0 mM Si to the B-toxic soil significantly increased Si concentration in the wheat and counteracted the deleterious effects of B on shoot growth. The contents of PRO, H2O2, MDA, and LOX activity of wheat grown in B-toxic soil were significantly reduced by Si treatments. Compared with control plants, the activities of SOD, CAT, APX and AA contents were decreased when Si was applied. Si alleviates B toxicity in wheat plants by preventing oxidative membrane damage and also translocation of B from root to shoot and/or soil to plant.
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