The application of genetically manipulated cyanobacterial strains in the study of glycerolipid unsaturation of photosynthetic membranes in the tolerance of photosynthetic machinery to temperature stresses

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Abstract

Cyanobacteria provide a simple experimental model system of the higher-plant chloroplast. Both perform oxygenic photosynthesis and their photosynthetic membranes contain very similar lipids. Some cyanobacterial strains are transformable and this opens up to the possibility of manipulating the lipid background of photosynthetic machinery independently from other membrane constituents. Using chilling-sensitive and chilling-tolerant strains, the importance of polyunsaturated grycerolipids in temperature adaptive responses and in tolerance to temperature stresses is demonstrated. The involvement of dienoic fatty acids in low-temperature tolerance has been suggested. The role of 18:2 fatty acids in the recovery process from low-temperature photoinhibition has also been emphasized. However, the determinative role of saturated and polyunsaturated fatty acids in high-temperature tolerance has not been proved.

Original languageEnglish
Pages (from-to)658-668
Number of pages11
JournalJournal of Scientific and Industrial Research
Volume55
Issue number8-9
Publication statusPublished - Aug 1 1996

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