+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Heat stabilities of electron transport related to photosystem i in a thermophilic blue green alga synechococcus sp



Heat stabilities of electron transport related to photosystem i in a thermophilic blue green alga synechococcus sp



Plant & Cell Physiology 23(2): 293-300



Heat-stabilities of photosystem [PS] I reactions in a thermophilic blue-green alga, Synechococcus sp. were studied. All the reactions examined were highly resistant to heat as compared with those in ordinary higher plants and algae. Cyt [cytochrome] c-553 photooxidation in vivo was abolished by treatment at 75.degree. C for 5 min. P700 photooxidation was extremely resistant to heat and could not be completely inactivated by treatment of the cells or isolated thylakoids at .apprx. 100.degree. C for 5 min. Photooxidation of added Cyt c-553 by isolated thylakoid membranes was more heat-stable than was this activity in cells. Apparently, heat-treatment caused a perturbation in the structural integrity of the membranes which is required for efficient electron transfer from Cyt c-553 to P700 in situ. At higher temperatures, the inactivation of Cyt c-553 photooxidation in the membranes parallels the decrease in the rate of P700 photooxidation. Spectrophotometric studies with short flashes indicated that inactivation of the electron transport from Cyt c-553 to methyl viologen is due to the denaturation of a secondary electron acceptor of PS I, A2, and possibly another acceptor, P430.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 005551640

Download citation: RISBibTeXText


Related references

Heat stabilities of cytochromes and ferredoxin isolated from a thermophilic blue green alga synechococcus sp. Plant & Cell Physiology 20(6): 1157-1162, 1979

Photosynthetic Electron Transport in Spheroplasts and Thylakoid Membranes from the Thermophilic Blue-Green Alga, Synechococcus lividus. Journal of Plant Physiology 118(1): 23-32, 1985

The lipid and fatty acid composition, electron transport, and light-energy redistribution in the thermophilic blue-green alga Synechococcus lividus grown at 55 C and 38 C. Annual report: 78 283-289, 1977

The kinetics of photosystem 2 photoinactivation in whole cells, thylakoids and PS2 particles of thermophilic blue green alga Synechococcus elongatus. Progress in photosynthesis research: proceedings of the VIIth International Congress on Photosynthesis Providence Rhode Island USA August 10-15-1986 edited by J Biggins: 8, 1987

The lipid and fatty acid composition, electron transport, and light-energy redistribution in the thermophilic blue-green alga Synechococcus lividus grown at 55 and 38 C degrees Celsius. Year book: 78 (77) 283-289, 1977

Action of bi carbonate and photosystem 2 inhibiting herbicides on electron transport in pea pisum sativum cultivar rondo grana and in thylakoids of a blue green alga synechococcus leopoliensis. Physiologia Plantarum 51(1): 106-110, 1981

The lipid and fatty acid composition electron transport and light energy re distribution in the thermophilic blue green alga synechococcus lividus grown at 55 celsius and 38 celsius. Mcgough, Sheila A. Carnegie Institution Of Washington Year Book 77: - . Viii 998p. Illus. Maps. Port City Press, Inc: Balitmore, Md., Usa. . 283-289, 1977, 1978

The participation of cyclic electron flow around photosystem I in state II to state I transitions in the blue-green alga Synechococcus lividus. Year book Carnegie Institution of Washington: (81st) 50-54, 1982

Preparation of active fractions enriched in photosystem I and photosystem II from the thermophilic blue-green alga Phormidium laminosum. Biochemical Society Transactions 6(5): 1040-1041, 1978

Phycobilisomes of the thermophilic blue-green alga Synechococcus lividus. Journal of Cell Biology 50(3): 896-900, 1971

Ultrastructure of the Thermophilic Blue-Green Alga, Synechococcus Lividus Copeland(1). Journal of Phycology 4(4): 283-298, 1968

Photosynthetic electron transport in a cell-free preparation from the thermophilic blue-green alga Phormidium laminosum. Biochemical Journal 188(2): 351-361, 1980

The effect on photosynthetic electron transport of temperature-dependent changes in the fluidity of the thylakoid membrane in a thermophilic blue-green alga. Biochimica et Biophysica Acta 635(3): 476-487, 1981

Isolation and characterization of photosystem I and II membrane particles from the blue-green alga, Synechococcus cedrorum. Biochimica et Biophysica Acta 503(2): 343-361, 1978

Chromatographic separation of photosystems i and ii from the thylakoid membrane isolated from a thermophilic blue green alga synechococcus sp. Plant & Cell Physiology 20(8): 1565-1576, 1979