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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Nov 2015, 36 (6)                                                                                                             Back

nstantaneous and historical temperature effects on a-pinene

Phyotoxicity of diesel soil contamination on the germination of Lactuca sativa and Ipomoea batatas


Kayode Fatokun1*, Francis Bayo Lewu2 and Godfrey Elijah Zharare1

1Department of Agriculture, University of Zululand, Kwa-Dlangezwa 3886, South Africa

2Department of Agriculture, Faculty of Applied Sciences, Cape Peninsula University of Technology, Wellington Campus,

Wellington, Western Cape 7655, South Africa

*Corresponding Author E-mail:




Publication Data

Paper received:

04 October 2014



Revised received:

03 April 2015




04 June 2015



Phytotoxic effect of diesel contaminated soil on germination rate of Lactuca sativa and Ipomoea batatas, at two concentrations ranges (0-6ml and 0-30ml), were investigated and compared. Diesel soil contamination was simulated and soil samples were taken from contaminated soil at 1, 5, 10, 15, 25, 50, 75 and 100 days should be after planting. The result showed that in both plant species, diesel inhibited germination in a concentration dependent manner, Also, the influence of diesel contamination diminished with increased time duration; suggesting possible reduction in diesel toxicity over time. However, germination of lettuce was significant and negatively correlated (r2= -0.941) with diesel contamination as compared to sweet potato (r2= -0.638).Critical concentration of diesel in relation to seed germination of L. sativa was lower than vegetative germination of I. batatas, indicating that germination of I. batatas was less sensitive to diesel contamination as compared to L. sativa.   



 Key words

Diesel contamination, Germination rate, Ipomoea batatas, Lactuca sativa,Phytotoxicity 



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