Rice plants in cadmium polluted environment

Abstract

The screening of different rice varieties to the   effect of  cadmium on growth parameters was done. As objects of the study were taken rice varieties - Chapsari, Barakat, Bakanas, Violetta, Anayt, Fisht, Marzhan, Madina. Plants were grown 7 days in solutions6 containing various concentrations  of cadmium (Cd SO₄). Plants were grown in 5 variants: control, 50 µM, 100 µM, 200 µM, 400 µM CdSO₄.  It was revealed that with increasing concentrations of cadmium the plants growth and accumulation of biomass are reduced. The biomass of the plant roots is  inhibited to a greater degree than the above-ground  organs. It was studied the action of cadmium on biomass accumulation of above-ground organs of rice. As a result of studies on the biomass accumulation by above-ground organs the rice varieties are located in the following way: Madina (75%) > Bakanas (62%) > Barakat (15%)> Chapsari (13%) > Violetta (10%)> Marzhan (3%) = Anayt (3%) > Fisht (2%). As the growth of the aerial organs most resistant to high concentrations of cadmium (CdSO4 400 µM) were  Madina, Violetta varieties, the least - Fisht, Marzhan. In comparison with the above-ground organs the roots were the most sensitive to the effects of cadmium.  According to a linear growth   rice varieties are lokated  in the following order: Barakat (23%)> Chapsari (18%)> Violetta (17%)> Fischt (7%)> Anahit (7%)> Marjane (5%)> Bakanas (4 %). It was studied the effect  of cadmium on biomass accumulation by above-ground organs of rice. On the biomass accumulation by above-ground organs the rice varieties are located in the following way: Madina (75%) > Baқanas (62%) > Barakat (15%)> Chapsari (13%) > Violetta (10%)> Marzhan (3%) = Anayt (3%) > Fisht (2%). The most resistant to high concentrations of cadmium (400 µM CdSO₄) were  Madina, Violetta, Bakanas varieties, the least - Marzhan, Anayt and Fisht. In comparison with the above-ground organs the roots were the most sensitive to the effects of cadmium.