Abstract
Phytoremediation of contaminated environment using hyperaccumulator plants is
considered as ecofriendly and cost-effective technique. Aquatic plants like
Ceratophyllum demersum (Coontail) is used for the phytoremediation of aquatic
environment contaminated by heavy metals. In this study, in vitro regenerated plants of
C. demersum were exposed to different concentrations of Chromium (Cr) (0, 3, 6, 9, 12
and 15 mg L-1
) for different exposure time (1, 3 and 5 days) in order to investigate the
phytoremediation potential. The plants contained in Cr containing liquid medium were
cultured in growth room having 16 hr light photoperiod aided by white Light Emitting
Diodes (LEDs) and temperature of 24±1 0C. The plant samples were taken out from
liquid medium after 1, 3 and 5 days for taking data regarding fresh weight, dry weight,
Cr uptake by plants and bioconcentration factor (BCF). The clear relationship between
Cr concentration and exposure time on phytoremediation was revealed. Both fresh and
dry weight of plants was recorded higher at variable Cr concentration compared to
control plants. The exposure time of 3 days to Cr caused the maximum Cr uptake,
followed by further uptake of Cr at relatively slow rate after 5 days. The highest Cr
uptake and BCF was achieved from medium provided with 12 mg L-1
and 3 mg L-1 of
Cr respectively. Comparison of exposure time exposure time × Cr concentration
revealed the highest Cr uptake (9145 mg kg-1
) and BCF value (2076.5) from the
combination of 12 mg L-1 × 5 d and 3 mg L-1 × 5 d respectively. The results revealed
that in vitro regenerated plants of C. demersum can be used for phytoremediation of Cr
and possibly use against other heavy metals.
Muhammad Aasim, Senar Aydın, Mehmet Karataş, Mehmet Emin Aydın, Canan Soğukpınar, Canan Sevinc. (2020) Bioaccumulation potential of In vitro regenerated plants of Ceratophyllum demersum against Chromium – A lab study, Asian Journal of Agriculture and Biology, Volume 8, Issue 3.
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