The Impact of Combined Alkalinity and Time Pretreatments on Light-Harvesting System in Tresterial Cyanobacterium Fischerella sp. FS 18 (Oscillatorials, Cyanophyta) | ||
| Plant, Algae, and Environment | ||
| دوره 5، شماره 1، 2021، صفحه 665-675 اصل مقاله (449.72 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.48308/jpr.2021.202886.0 | ||
| نویسندگان | ||
| Fatemeh Yadollahi1؛ Shadman Shokravi* 2 | ||
| 1Azad University gorgan | ||
| 2Department of Biology, Gorgan Branch, Islamic Azad University, Gorgan, Iran | ||
| چکیده | ||
| Possibility of change in the phycobilisome status, photosynthetic pigments, photosynthetic ratios, and photosynthetic parameters of soil cyanobacteria Fischerella sp. FS 18 investigated. Neutral and extreme alkaline pH (7, 9), and short time incubation including 20, 40, and 60 minutes treatments. After purification, cyanobacteria were subjected to extreme alkaline treatment for one hour at 20, 40, and 60 minutes intervals. Colorimetric assays of phycocyanin, allophycocyanin, phycoerythrin, chlorophyll) and a comparison of the combined effect of time and alkalinity on photosynthetic ratio performed. Indeed, the photosynthesis-light curves compared with direct measurements. The results showed that the combined treatment of time and alkalinity after 20 minutes of inoculation significantly increased the performance of the photosystem and stability of the phycobilins. While, under the 40 min and both neutral and alkaline treatments, the yield of photosystem II, increased the production of the photosystem I, and significantly the linear fraction of the photosynthesis-light curve. Although, the needed energy to achieve maximum photosynthesis was reduced. Further, the maximum photosynthesis was completely different at 40 min pretreatment and without pretreatment. Furthermore, the results show no specific regularity and trend at 20 and 60 minutes of treatment. Thus, the production of light collecting-antennas is influenced by both time and alkalinity treatments. In consequence, 60 minutes or fewer treatment times, cause a significant change in the structure and performance of the photosynthetic apparatus. While alkaline treatments at a short time significantly save energy and enhance photosynthesis. | ||
| کلیدواژهها | ||
| Pretreatment؛ Time؛ Cyanobacteria؛ Alkalinity؛ Fischerella sp. FS 18 | ||
| مراجع | ||
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