Bioremediation of malathion in aquatic system by different microbial isolates | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 15, Issue 2, December 2007, Pages 13-28 PDF (279.4 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.2007.459655 | ||
| Authors | ||
| Ahmed H. Massoud* 1; Aly S. Derbalah1; El-Sayed B. Belal2; Ismail I. El-Fakharany2 | ||
| 1Pesticides Department, Fac. of Agric., Kafr El-Sheikh Univ. | ||
| 2(Agric. Microbiology), Agric. Botany Dept., Fac of. Agric., Kafr El-Sheikh Univ. | ||
| Abstract | ||
| Efficiencies of five microbes isolated from cucumber leaves were evaluated for malathion degradation at recommended dose level (50µg/ml) in aquatic system. The identified isolates were belonging to bacterial group (Pseudomonas spp EM1, EM5 and EM6) and fungal group (Asperigillus sp. (EM8) and Penicillium sp. (EMT)). Moreover, the effect of pH and temperature on the growth ability of the different tested isolates was investigated. The results showed that the optimum pH for the growth of the malathion-degrading isolates (bacterial and fungal one) was 7.A temperature of 30◦C appears to be the optimum for growth of either the fungal or bacterial isolates. The degradation rate of malathion by different microbial isolates was very high, since 50% of malathion initial concentration (50µg/ml) decomposed within one week. Moreover, almost 100% of the malathion initial concentration degraded within two weeks by all microbial isolates. Asperigillus sp. isolate showed the highest ability for degrading malathion followed by Penicilluim sp. and Pseudomonas spp., respectively. The degradation rate of malathion by fungal isolates was faster than the bacterial one. The tested microorganisms isolated from cucumber leaves are promising for detoxification of malathion in aquatic system. | ||
| Keywords | ||
| malathion; biodegradation; water; microorganisms; vegetables | ||
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