Morphological and anatomical effects of crude oil on <Emphasis Type="Italic">Pistia stratiotes</Emphasis> |
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Authors: | Akintunde Abdul-Rasaq Akapo S O Omidiji A A Otitoloju |
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Institution: | (1) Department of Cell Biology and Genetics, Faculty of Science, University of Lagos, Akoka, Yaba, Lagos, Nigeria;(2) Department of Zoology, Ecotoxicology Laboratory, Faculty of Science, University of Lagos, Akoka, Yaba, Lagos, Nigeria |
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Abstract: | Fresh whole plants of Pistia stratiotes were exposed to varying doses of crude oil (0–100 ppm) for 28 days at normal temperature of 30 ± 2°C. Samples were taken
weekly during this period for determination of changes in leaf area, root length, number of leaves, and number of sprouts.
The cross-section of one terminal end of the major roots and cellular distribution of the meristematic region were also examined.
The results show that crude oil was toxic to the plant at all concentrations in all investigated parameters for as low as
10 ppm. Association was also observed between crude oil toxicity and certain metals inherent in the crude oil such as manganese
and lead. Cell shape disruptions, changes in mitotic indices, and the distortion of cellular anatomy and structure at the
apical region also characterized the presence of crude oil in the environment of P. stratiotes. P. stratiotes may not be a good bio-accumulator of crude oil but may be used for the detection of pollution. |
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