Abstract
Soybean (Glycine max L. Merril) is one of the most nutritionally valuable legumes in Africa. However, spent automobile engine oil is always disposed indiscriminately on lands and water bodies in Nigeria, which pollutes both terrestrial and aquatic ecosystems, with adverse effects on crop growth and productivity. This study investigated the effects of spent engine oil (SEO) polluted soils on growth parameters and mitotic chromosomes of soybean. Two soybean varieties (TGX-1448-2E and local) were planted in pots filled with sandy-loam soil treated with 0, 0.1, 0.4 and 0.7% v/w SEO concentrations, in 2 × 4 factorial experiment laid in a completely randomized design with six replications. Data were collected at weekly intervals for four weeks on growth parameters (plant height, number of leaves, leaf width and leaf length) and chromosomal aberration. Data were subjected to ANOVA and means separated with LSD. Among the treatments, seed germination rate was significantly higher in TGX-1448-2E (95.0 ± 0.0-96.0 ± 0.7%) than local variety (70.0 ± 0.7-71.0 ± 0.7%). Both 0.4 and 0.7% SEO caused significant (p ≤ 0.01) reductions in plant height, number of leaves, leaf length and leaf width whereas, 0.1% did not reduce growth parameters. Treatments 0.4 and 0.7% SEO caused high chromosomal aberrations in soybean as they reduced chromosome numbers (from 40.0 to 23%), cell division, mitotic index (70.0 to 20.8%) and produced 31.7% abnormal cells. Abnormalities such as bridges, laggards and chromosome stickiness occurred. This study shows that 0.4-0.7% SEO polluted soils is phytotoxic to soybeans.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.