BIOCHEMICAL RESPONSE OF THE OAT TO ACCUMULATION OF IRON AND MANGANESEALEXANDER PETUKHOV, NIKOLAY KHRITOKHI, GALINA PETUKHOVA AND ALEXANDER KUDRYAVTSEV
Heavy metals present a significant danger to the environment and stability of phytocenoses. Accumulating in plants, metals can upset biochemical processes in cells. This study is devoted to research of Fe and Mn accumulation in oat in conditions of organogenic and mineral model soil pollution and influence of these metals on various biochemical parameters of plants. Oat accumulated Mn in greater amounts than Fe. Translocation of Fe and Mn depends on the type of soil and advance into plant organs. The antagonism of Fe and Mn was observed. Toxic stress caused by Fe and Mn is compensated by activation of antioxidant systems: phenolic compounds (in the first place), flavonoids, peroxidase and catalase in most cases. Soil pollution by Fe and Mn leads to decrease in photosynthetic pigments concentration, especially in the experiment with mineral soil. Results of this study indicate that accumulation of Fe and Mn causes various effects on lipid peroxidation products, photosynthetic pigments and different antioxidants.
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