PRODUCTIVITY OF BIOMASS AND SOME METABOLITES OF ANABAENA ORYZAE AND NOSTOC SP. GROWN UNDER STRESS CONDITIONS | ||||
| Assiut University Journal of Multidisciplinary Scientific Research | ||||
| Volume 46, Issue 1, June 2017, Page 1-22 PDF (868.27 K) | ||||
| Document Type: Novel Research Articles | ||||
| DOI: 10.21608/aunj.2017.221411 | ||||
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| Abstract | ||||
| The current study aimed to investigate the effect of stress conditions such as nitrogen and phosphorous deficiency and supplementation, salinity stress and different pH values on the biomass, lipid, protein, amino acid and carbohydrate productivities of Anabaena oryzae and Nostoc sp. The obtained results revealed that an increase in sodium nitrate by 100% led to increase in the productivities of biomass, protein and amino acid of A. oryzae and Nostoc sp. While 100% nitrogen deficiency enhanced lipid productivity to 40.8% and 48.7% for A. oryzae and Nostoc sp., respectively. In addition, phosphorus limitation led to a reduction in biomass, lipid, amino acid and carbohydrate for A. oryzae to 36%, 48.4%, 59.3% and 20%, respectively. However, phosphorus free medium showed an increase in lipid productivity by 35% over the control in Nostoc sp. Application of all concentrations of NaCl decreased the productivities of all metabolites in A. oryzae. While high concentration (0.3M) of NaCl enhanced carbohydrate productivity to 127.2% for Nostoc sp. In addition, the biomass productivity of A. oryzae and Nostoc sp. was increased at pH 7 and at pH 8, respectively. The maximum production of amino acid in A. oryzae and Nostoc sp. was obtained at pH 8. On the other hand, the acidic and alkaline conditions did not cause any significant changes on the productivity of carbohydrate in case of A. oryzae and Nostoc sp. | ||||
| Keywords | ||||
| Anabaena oryzae; Nostoc sp; Nutrients stress; pH; Productivity | ||||
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