Abstract
Plants of Eichhornia crassipes grown at various levels of cadmium ranging from 0.1 to 100 μg ml−1 accumulated Cd in a concentration and duration dependent manner. At all levels, Cd accumulation by various plant tissues followed the order roots shoot leaves. Approximately 80% of total Cd was accumulated by plant at highest concentration (100 μg ml−1) used in the experiment. Cadmium induced phytotoxicity appears at 25.0 μg ml−1 resulting into reduced levels of chlorophyll, protein and in vivo nitrate reductase activity of the plant. However, a slight induction of these physiological variables was obtained at lowest Cd (0.1 μg ml−1) concentration. In contrast, carotenoid content increased at highest Cd concentration i.e., 100 μg ml−1. Similar effects at low and high levels of Cd was obtained with respect to mitotic index and micronuclei in root meristem of the plant. It could be inferred that Cd toxicity in plant is differential depending upon the low and high concentration of Cd in the medium.
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Mishra, K.K., Rai, U.N. & Prakash, O. Bioconcentration and Phytotoxicity of Cd in Eichhornia crassipes . Environ Monit Assess 130, 237–243 (2007). https://doi.org/10.1007/s10661-006-9392-5
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DOI: https://doi.org/10.1007/s10661-006-9392-5