A Comparative survey of bioaccumulation of some mettallic ions such as CU(II), Cr(VI)O₄²⁻ by the aquatic fern - Azolla Pinnata
| dc.contributor.author | Karunaratne, H. W. C. C. | |
| dc.date.accessioned | 2024-12-12T11:03:40Z | |
| dc.date.available | 2024-12-12T11:03:40Z | |
| dc.date.issued | 2000 | |
| dc.description.abstract | Plants of Azolla pinnata were treated with six different concentrations of Cu(II) and Cr(VI)O₄²⁻ (0.5, 1.0, 2.0, 3.0, 4.0, and 5.0 mg dm⁻³) for 48, 72, 168 hours under laboratory conditions. Accumulation of Cu(II) and Cr(V)O₄²⁻ by Azolla pinata was studied. cud accumulation was greater than that of Cr for Azolia plants. The plants showed ability to reduce 5.0 mg dm⁻³ Cu background concentration to below 0.03 mg dm⁻³ within 168 hours. The Cr(VI)O₄²⁻ concentration of 5.0 mg dm⁻³ was reduced to below 0.14 mg dm⁻³ in 168 hours. Cysteine synthesis was greater under Cu than Cr stress condition. The Chlorophyll content in plants decreased non-significantly with an increase in Cu(II) and Cr(VI)O₄²⁻ concentrations and duration of exposure. The results suggest that an increase in cysteine by Cu(II) and Cr(V1)O₄²⁻ treatment at the initial exposure period are part of the overall expression of Cu(I) and Cr(VI)O₄²⁻ tolerance in the plant, and the decrease in Chlorophyll content is a consequence of Cu(II) and Cr(V1)O₄²⁻ toxicity at higher metal concentrations and increased period of exposure. | |
| dc.identifier.uri | https://ir.lib.pdn.ac.lk/handle/20.500.14444/4838 | |
| dc.language.iso | en_US | |
| dc.publisher | University of Peradeniya | |
| dc.subject | Azolla Pinnata | |
| dc.subject | Mettallic Ions | |
| dc.title | A Comparative survey of bioaccumulation of some mettallic ions such as CU(II), Cr(VI)O₄²⁻ by the aquatic fern - Azolla Pinnata | |
| dc.type | Thesis |