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Biodegradation and utilization of organophosphorus pesticide malathion by Cyanobacteria.

Ibrahim WM, Karam MA, El-Shahat RM, Adway AA - Biomed Res Int (2014)

Bottom Line: A sharp decrease in the growth of the algal strains was observed by increasing the concentration of malathion.Although, the algal growth under P-limitation recorded a very poor level, a massive enhanced growth and phosphorous content of cells were obtained when the P-limited medium was amended with malathion.This study clarified that N. muscorum with its capability to utilize malathion as a sole phosphorous source is considered as an inexpensive and efficient biotechnology for remediation of organophosphorus pesticide from contaminated wastewater.

View Article: PubMed Central - PubMed

Affiliation: Botany Department, Faculty of Science, Fayoum University, Fayoum, Egypt.

ABSTRACT
Three strains of filamentous Cyanobacteria were used to study their growth and utilization of organophosphorus pesticide malathion. A sharp decrease in the growth of the algal strains was observed by increasing the concentration of malathion. Amongst them Nostoc muscorum tolerated different concentrations and was recorded as the highest efficient strain for biodegradation (91%) of this compound. Moreover, carbohydrate and protein content of their cells overtopped the other strains especially at higher concentrations. The algal strains were further subjected to grow under P-limitation in absence and presence of malathion. Although, the algal growth under P-limitation recorded a very poor level, a massive enhanced growth and phosphorous content of cells were obtained when the P-limited medium was amended with malathion. This study clarified that N. muscorum with its capability to utilize malathion as a sole phosphorous source is considered as an inexpensive and efficient biotechnology for remediation of organophosphorus pesticide from contaminated wastewater.

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Effect of different malathion concentrations on the growth of N. muscorum.
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fig2: Effect of different malathion concentrations on the growth of N. muscorum.

Mentions: Data in Figures 1, 2, and 3 demonstrated the effect of malathion concentrations on the growth of three cyanobacterial strains, A. oryzae, N. muscorum, and S. platensis. Obviously, an inverse relationship between malathion concentration and the algal growth was recorded. At low concentrations of malathion (0.02–20 ppm), the maximum growth of A. oryzae and N. muscorum was achieved within 24 days recording an increment of the total cell number by 41% and 75%, respectively, compared with the untreated culture. At the same time, different malathion concentrations dramatically reduced the growth of S. platensis recording a reduction of the total cell count by 19% compared with the control treatment. Regression lines (Figure 4) indicated that N. muscorum was more tolerant than the other algal strains with different concentrations of malathion.


Biodegradation and utilization of organophosphorus pesticide malathion by Cyanobacteria.

Ibrahim WM, Karam MA, El-Shahat RM, Adway AA - Biomed Res Int (2014)

Effect of different malathion concentrations on the growth of N. muscorum.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4016846&req=5

fig2: Effect of different malathion concentrations on the growth of N. muscorum.
Mentions: Data in Figures 1, 2, and 3 demonstrated the effect of malathion concentrations on the growth of three cyanobacterial strains, A. oryzae, N. muscorum, and S. platensis. Obviously, an inverse relationship between malathion concentration and the algal growth was recorded. At low concentrations of malathion (0.02–20 ppm), the maximum growth of A. oryzae and N. muscorum was achieved within 24 days recording an increment of the total cell number by 41% and 75%, respectively, compared with the untreated culture. At the same time, different malathion concentrations dramatically reduced the growth of S. platensis recording a reduction of the total cell count by 19% compared with the control treatment. Regression lines (Figure 4) indicated that N. muscorum was more tolerant than the other algal strains with different concentrations of malathion.

Bottom Line: A sharp decrease in the growth of the algal strains was observed by increasing the concentration of malathion.Although, the algal growth under P-limitation recorded a very poor level, a massive enhanced growth and phosphorous content of cells were obtained when the P-limited medium was amended with malathion.This study clarified that N. muscorum with its capability to utilize malathion as a sole phosphorous source is considered as an inexpensive and efficient biotechnology for remediation of organophosphorus pesticide from contaminated wastewater.

View Article: PubMed Central - PubMed

Affiliation: Botany Department, Faculty of Science, Fayoum University, Fayoum, Egypt.

ABSTRACT
Three strains of filamentous Cyanobacteria were used to study their growth and utilization of organophosphorus pesticide malathion. A sharp decrease in the growth of the algal strains was observed by increasing the concentration of malathion. Amongst them Nostoc muscorum tolerated different concentrations and was recorded as the highest efficient strain for biodegradation (91%) of this compound. Moreover, carbohydrate and protein content of their cells overtopped the other strains especially at higher concentrations. The algal strains were further subjected to grow under P-limitation in absence and presence of malathion. Although, the algal growth under P-limitation recorded a very poor level, a massive enhanced growth and phosphorous content of cells were obtained when the P-limited medium was amended with malathion. This study clarified that N. muscorum with its capability to utilize malathion as a sole phosphorous source is considered as an inexpensive and efficient biotechnology for remediation of organophosphorus pesticide from contaminated wastewater.

Show MeSH
Related in: MedlinePlus