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Abstract Detail


Ecological Section

Ogunwenmo, K. Olusola [1], Dibia, Daphnie [2], Oyelana, Olatunji [1].

Toxicity assessment of Industrial effluents on Allium root tip mitosis.

Paint (10-100 %) and soft drink (75 and 100 %) effluents inhibited onion root growth (1.3 - 2.2 cm) vis-à-vis the control (4.1 cm). Root length, however, increased (5.7 - 7.1 cm) with increasing concentration in brewery wastewater. Soft drink and brewery effluents caused c-tumors in Allium root at high concentration (75 - 100 %). Lower concentration (10 - 50 %) was sufficient to develop the condition in paint while high concentrations led to more severe toxic condition - crotchet hooks. These toxic effects were accompanied by chromosomal aberrations - c-mitosis (1.5 31.7 %) and sticky chromosomes (5.3 - 19.9 %) above the control values (1.2 and 2.4 % respectively). The occurrence of chromosome breaks, bridges and laggards indicated that these effluents may be mutagenic. Soft drink and paint wastewater decreased mitotic index as concentration increased while brewery effluent enhanced it. The role of heavy metals (Pb, Zn, Cu) in toxic incidence of the effluents and the effective concentration for safe discharge of the wastewater will be discussed.


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1 - Babcock University, Ilishan-Remo, Dept. of Basic & Applied Sciences, PMB 21244, Ikeja, Lagos, Lagos, 100-001, Nigeria
2 - Babcock University, Ilishan-Remo, Department of basic & Applied Sciences, PMB 21244, Ikeja, Lagos, Lagos, 100001, NIGERIA

Keywords:
Allium test
effluent
chromosomal aberration
mitosis
Phytotoxicity
Wastewater.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM
Number: PEC025
Abstract ID:502

Canceled

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