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http://nopr.niscpr.res.in/handle/123456789/15390| Title: | Induction of polyunsaturated fatty-acid synthesis enhances tolerance of a cyanobacterium, Cylindrospermopsis raciborskii, to low-temperature photoinhibition |
| Authors: | Zsiros, Otto Varkonyi, Zsuzsanna Kovacs, Attila Farkas, Tibor Gombos, Zoltan Garab, Gyozo |
| Issue Date: | Dec-2000 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Acyl-lipid desaturation introduces double bonds (unsaturated bonds) at specifically defined positions of fatty acids that are esterified to the glycerol backbone of membrane glycerolipids. Desaturation pattern of the glycerolipids of Cylindrospermopsis raciborskii (C. raciborskii) , a filamentous cyanobacterial strain, was determined in cells grown at 35°C and 25 °C. The lowering of the growth temperature from 35°C to 25°C resulted in a considerable accumulation of polyunsaturated octadecanoic fatty acids in all lipid classes. Lipid unsaturation of C. raciborskii was also compared to Synechocytis PCC6803. In C. raciborskii cells, a shift in growth temperature induced a much more pronounced alteration in the desaturation pattern of all lipid classes than in Synechocystis PCC6803. The tolerance to low-temperature photoinhibition of the C. raciborskii cells grown at 25uC and 35°C was al so compared to the tolerance of Synechocystis cells grown at the same temperatures. Lower growth temperature increased the tolerance of C. raciborskii cells but not that of Synechocystis cells. These results strengthen the importance of polyunsaturated glycerolipids in the tolerance to environmental stresses and may give a physiological explanation for the determinative role of C. raciborskii strain in algal blooming in the Lake Balaton (Hungary). |
| Page(s): | 470-476 |
| ISSN: | 0975-0959 (Online); 0301-1208 (Print) |
| Appears in Collections: | IJBB Vol.37(6) [December 2000] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJBB 37(6) 470-476.pdf | 1.59 MB | Adobe PDF | View/Open |
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