Stimulation of Hydrogen Photoproduction in Chlorella sorokiniana Subjected to Simultaneous Nitrogen Limitation and Sulfur- and/or Phosphorus-Deprivation
| Autor: | Kittisak Yokthongwattana, Ramaraj Sathasivam, Piyawat Pongpadung, Litao Zhang, Jianguo Liu, Niran Juntawong |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Chlorella sorokiniana Hydrogen hydrogen production Chemistry Phosphorus 05 social sciences nitrogen limitation chemistry.chemical_element Stimulation chlorella sorokiniana Applied Microbiology and Biotechnology Microbiology Nitrogen Sulfur phosphorus & sulfur deprivation QR1-502 03 medical and health sciences 030104 developmental biology Environmental chemistry 0502 economics and business 050207 economics Biotechnology |
| Zdroj: | Journal of Pure and Applied Microbiology, Vol 12, Iss 4, Pp 1719-1727 (2018) |
| ISSN: | 2581-690X 0973-7510 |
| DOI: | 10.22207/jpam.12.4.04 |
| Popis: | Photosynthetic hydrogen (H2 ) production by green algae has fascinated biologists and energy experts, due to the potential application of this process for renewable energy. In this study, H2 photoproduction and PSII photochemical activities were investigated in Chlorella sorokiniana exposed to simultaneous nitrogen limitation and sulfur (S-) and/ or phosphorus (P-) deprivation. Under S-deprivation, C. sorokiniana produced about 48.2 mL L-1 of H2 . Moreover, simultaneous nitrogen limitation (0.7 mM NH4 Cl) and sulfur- and/or phosphorus-deprivation significantly increased H2 production of C. sorokiniana over that of S-deprivation alone. Maximum H2 outputs of 77.3, 98.1 and 125.1 mL L-1 were obtained in the N-limited cultures exposed to P-deprivation (TAP-P), S-deprivation (TAP-S) and simultaneous S- and P-deprivation (TAP-S-P), respectively. The average rate of H2 production for the N-limited culture exposed to TAP-P, TAP-S and TAP-S-P was 1.07, 1.36 and 1.50 mL L-1 h-1, respectively. Interestingly, the H2 inducement time in the culture subjected to simultaneous N-limitation and S- and/or P-deprivation was much shorter than that of traditional S-deprivation. The photosynthetic inhibitors, 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) and 2,5-dibromo-3-methyl-6-isopropylp-benzoquinone (DBMIB) repressed H2 production in TAP-S-P (0.7 mM NH4 Cl) medium by 68.04% and 98.65%, respectively. The conditions of simultaneous N-limitation, S- and P-deprivation provided another efficient method for inducing H2 production in C. sorokiniana. In addition, we also found that two-thirds of the required electrons were generated from the splitting of H2 O in PSII and that the remaining onethird possibly came from some other substrate catabolism. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|