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Abstract - Issue Nov 2015, 36 (6) Back
nstantaneous and historical temperature effects on a-pinene
of diesel soil contamination on the germination of Lactuca sativa and Ipomoea
Francis Bayo Lewu2 and Godfrey Elijah Zharare1
Agriculture, University of Zululand, Kwa-Dlangezwa 3886, South Africa
Agriculture, Faculty of Applied Sciences, Cape Peninsula University of
Technology, Wellington Campus,
Western Cape 7655, South Africa
Author E-mail: firstname.lastname@example.org
04 October 2014
03 April 2015
04 June 2015
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.
contamination, Germination rate, Ipomoea batatas, Lactuca sativa,Phytotoxicity
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