Effects of illuminance and nutrients on bacterial photo-physiology of hydrocarbon degradation
| Autor: | Aqib Hassan Ali Khan, Mariam Anees, Muhammad Arshad, Yousaf Shad Muhammad, Mazhar Iqbal, Sohail Yousaf |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Environmental Engineering Biomass 010501 environmental sciences Bacterial Physiological Phenomena 01 natural sciences Microbiology Nutrient density 03 medical and health sciences Nutrient Environmental Chemistry Soil Pollutants Food science Waste Management and Disposal Soil Microbiology 0105 earth and related environmental sciences biology Biodegradation Pseudomonas rhizosphaerae biology.organism_classification Pollution Hydrocarbons 030104 developmental biology Biodegradation Environmental Petroleum Pseudomonas poae Pseudomonas proteolytica Soil microbiology |
| Zdroj: | The Science of the total environment. |
| ISSN: | 1879-1026 |
| Popis: | Bacterial photophysiology was previously limited to photoautotrophs. The discovery of bacteriophytochromes in non-photoautotrophs raised a question whether these non-photoautotrophs are affected by the presence or absence of light? In this research work for the first time, bacterial hydrocarbon degradation and biomass production was studied under the influence of nutrients, illuminance (light flux) and time. An experimental model was designed, with six isolated bacterial strains (Pseudomonas poae BA1, Pseudomonas rhizosphaerae BP3, Bacillus thuringiensis BG3, Acinetobacter bouvetii BP18, Pseudomonas proteolytica BG31 and Stenotrophomonas rhizophila BG32) under four different conditions of nutrient media and illuminance at three time intervals of 15, 30, and 45days without shaking. All strains showed statistically higher hydrocarbon degradation under nutrient rich, dark conditions. Highest biodegradation (80.8, 79.4, and 78.7mg) was observed in BG31, BG17 and BG3 respectively. Nutrient rich media along with dark conditions improved the biomass production, and when media was nutrient deprived, higher biomass was produced in the presence of light. This work proved that light and nutrients significantly affect bacterial populations and hydrocarbon degradation. The optimal use of these parameters could facilitate to achieve the goal of remediation of hydrocarbon contaminated sites. |
| Databáze: | OpenAIRE |
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