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Effect of different concentrations of nitrate andphosphateon Geosmin and 2-Methylisoborneol production by some species of cyanobacteria | ||
| journal of al-qadisiyah for pure science(quarterly) | ||
| Article 1, Volume 15, Issue 2, 2015, Pages 14-29 PDF (0 K) | ||
| Author | ||
| ad M. Alkam | ||
| Abstract | ||
| This study is considered the first of its kind in Iraq, It deals with compounds that never had been studied in Iraq called taste and odour compounds, mostfrequentweregeosmin and 2- MIB. Two species were identified as producers for taste and odour compounds, the first was Phormidiumretzii produced geosmin and Microcoleusvaginatus produced 2-MIB which were recorded for the first time in the world as a producer. The headspace solid phase microextraction method was used to extract these two compounds from aqueous solution, which were used for the first time in Iraq. Four concentrations of nitrate and phosphate were used (97, 350, 861 and 1500 µgNO3-- N/L) and(12, 40, 400 and 870 µgPO4--P/L), for observing its effect upon the production of geosmin and 2-MIB by two cyanobacterialspecies.Themaximalproductionofgeosmin was 281.38 ng/l occurred at 861µg NO3-N/L, whereas the higher production of 2-MIB was 296 ng/l occurred at the same concentration in the late of logarithmic phase. The high concentration of nitrate (1500 µgNO3--N/L) leaded to suppressed geosmin and 2-MIB productions.Themaximalproductionofgeosmin was 132.2 ng/l occurred at 870µg PO4-P/L, whereas the higher production of 2-MIB was 167.2 ng/l occurred at the same concentration in the late logarithmic phase. | ||
| Keywords | ||
| Cyanobacteria; Geosmin; Nitrate; Phosphate; Geosimin; MIB | ||
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