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Accumulation, tolerance and impact of aluminium, copper and zinc on growth and nitrate reductase activity of Ceratophyllum demersum (Hornwort)

dc.contributor.authorUmebese, C. E.
dc.contributor.authorMotajo, A. F.
dc.date.accessioned2019-09-19T15:34:19Z
dc.date.available2019-09-19T15:34:19Z
dc.date.issued2008
dc.identifier.citationUmebese, C. E. and Motajo, A. F. (2008). Accumulation, tolerance and impact of aluminium, copper and zinc on growth and nitrate reductase activity of Ceratophyllum demersum (Hornwort). Journal of Environmental Biology 29(2): 197 - 200en_US
dc.identifier.issn2394-0379
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/5761
dc.description.abstractCeratophyllum demersum (hornwort) was subjected to toxic concentrations of Al (3 and 9 mg l -1), Zn (3 and 9 mg l -1) and Cu (2.5 and 7 mg l -1) in culture solutions for 15 days. The higher dose of Al enhanced the chlorophyll content significantly (p<0.05) in the first 6 days of treatment while other treatments caused marked reductions. Nitrate reductase activity (NRA) was significantly reduced (p<0.05) by Al, Cu and Zn toxicity and ceased completely in plants treated with Cu by the 6th day of treatment. Dry biomass and relative growth rate were reduced significantly (p<0.05) by metal treatment. Tolerance index of the plant was low for Cu (21.62 and 13.43% at low and high doses, respectively) and moderate for Zn (63.74 and 54.85%) and Al (72.83 and 68.79%). Accumulation of Al, Zn and Cu was threefold at higher doses compared with the lower doses but the bioconcentration factors (BCF) were very low indicating that this plant is not a hyper accumulator of these metals.en_US
dc.language.isoenen_US
dc.publisherTriveni Enterprises, Lucknow (India)en_US
dc.subjectAlen_US
dc.subjectZnen_US
dc.subjectCuen_US
dc.subjectTolerance indexen_US
dc.subjectChlorophyllen_US
dc.subjectGrowthen_US
dc.subjectNitrate reductase activityen_US
dc.titleAccumulation, tolerance and impact of aluminium, copper and zinc on growth and nitrate reductase activity of Ceratophyllum demersum (Hornwort)en_US
dc.typeArticleen_US


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