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Journal of Biological Sciences

Year: 2010 | Volume: 10 | Issue: 2 | Page No.: 122-130
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Authors

R.I. Ibemesim

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Research Article

Effect of Salinity and Wytch Farm Crude Oil on Paspalum conjugatum Bergius (Sour Grass)

R.I. Ibemesim
The objective of this study was to investigate the individual and dual effect of salinity and Wytch Farm Crude oil on the growth and ion balance of Paspalum conjugatum. Increase in salinity resulted in a significant (p<0.05, Tukey HSD) decrease in dry weight of both aboveground and belowground tissues. Plant mortality was recorded between 43 and 64% ASW. Increase in salinity resulted in a significant (p<0.001, Tukey HSD) increase in aboveground Na+ concentration to a maximum of 3.2 μM mg-1 dw in 64% ASW treatment compared to 0.63 μM mg-1 dw Na+ in 14% ASW treatment. Paspalum conjugatum survived Low oiling (Lo) but Heavy oiling (Ho) resulted in mortality. The interactive effect of oil and salt was detrimental to the growth of Paspalum conjugatum and significantly decreased K+ concentration and K+, Na+ ratio.
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