Thermally-induced delayed luminescence from PS I in membranes of thermophilic cyanobacteria

Kaurov, Yury N; Aksyonova, Galina E; Lovyagina, E.R.; Veselova, T. V.; Иванов, И. Э.

doi:10.1016/0005-2728(93)90221-z

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…The methods of cyanobacterial cultivation and isolation of the membranes have been described previously [6,7]. PS I samples were obtained after treatment of the membranes with lauryldimethylamine‐ N ‐oxide (ratio of detergent to chlorophyll was 2.7:1, w/w) at 4°C for 40 min.…”

Section: Methodsmentioning

confidence: 99%

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Inorganic Fe²⁺ formation upon Fe‐S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mössbauer spectroscopy study

et al. 1999

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A model description of the Mo «ssbauer spectrum (80 K) of native membranes of the thermophilic cyanobacterium Synechococcus elongatus is suggested on the basis of the known values of quadrupole splitting (v vE Q ) and isomer shift (N N Fe ) for the iron-containing components of the photosynthetic apparatus. Using this approach, we found that heating the membranes at 70^80 K results in a decrease of doublet amplitudes belonging to F X , F A , F B and ferredoxin and simultaneous formation of a new doublet with v vE Q = 3.10 mm/s and N N Fe = 1.28 mm/s, typical of inorganic hydrated forms of Fe 2+ . The inhibition of electron transfer via photosystem I to oxygen, catalyzed by ferredoxin, occurs within the same range of temperatures. The data demonstrate that the processes of thermoinduced Fe 2+ formation and distortions in the photosystem I electron transport in the membranes are interrelated and caused mainly by the degradation of ferredoxin. The possible role of Fe 2+ formation in the damage of the photosynthetic apparatus resulting from heating and the action of other extreme factors is discussed.z 1999 Federation of European Biochemical Societies.

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Section: Methodsmentioning

confidence: 99%

“…Fragments of membranes, enriched in PS I, were pelleted at 144 000× g for 50 min. The characteristics of the samples of PS I have been given by Kaurov et al [7]. HEPES‐NaOH buffer (15 mM; pH 7.5) with MgCl 2 (10 mM) was used in experiments with photosynthetic membranes and PS I‐enriched fragments.…”

Section: Methodsmentioning

confidence: 99%

Inorganic Fe²⁺ formation upon Fe‐S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mössbauer spectroscopy study

et al. 1999

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“…DF has some specific features in cyanobacteria, due to their specific structural arrangement of the photosynthetic membranes. In particular, in contrast to other algae, some parameters of delayed fluorescence from cyanobacteria show specific changes within the temperature range at which membrane lipids undergo thermophilic phase transitions [102].…”

Section: Delayed Fluorescence Analysismentioning

confidence: 97%

Studying Cyanobacteria by Means of Fluorescence Methods: A Review

Grigoryeva¹

2020

Fluorescence Methods for Investigation of Living Cells and Microorganisms

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Self-fluorescence is a powerful tool for investigation of living photosynthetic microorganisms. Since the physiological state of such microorganisms is closely related to the operation and activity of photosynthetic system; thus, any variations in spectroscopic properties of their self-fluorescence indicate the changes in their physiological state. Cyanobacteria (or blue green alga) are one of the most widespread photosynthetic organisms in nature, and the ecological aspect in their investigation is quite valuable. On the other hand, thousands of strains belonging to different cyanobacterial species are cultivated in biolaboratories all over the world for different biotechnological applications such as biofuel cells, food production, pharmaceuticals, and fertilizers. Thus, the novel noninvasive methods of their investigation are quite important for on-line monitoring of cyanobacterial cultures. In this chapter, several fluorescence techniques are presented for investigation of living cyanobacterial cells and cultures.

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Elevated Temperature Stress Effects on Photosystems: Characterization and evaluation of the nature of heat induced impairments

Bukhov

Mohanty

1999

Concepts in Photobiology

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Thermally-induced delayed luminescence from PS I in membranes of thermophilic cyanobacteria

Cited by 5 publications

References 7 publications

Inorganic Fe²⁺ formation upon Fe‐S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mössbauer spectroscopy study

Inorganic Fe²⁺ formation upon Fe‐S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mössbauer spectroscopy study

Studying Cyanobacteria by Means of Fluorescence Methods: A Review

Elevated Temperature Stress Effects on Photosystems: Characterization and evaluation of the nature of heat induced impairments

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Thermally-induced delayed luminescence from PS I in membranes of thermophilic cyanobacteria

Cited by 5 publications

References 7 publications

Inorganic Fe2+ formation upon Fe‐S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mössbauer spectroscopy study

Inorganic Fe2+ formation upon Fe‐S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mössbauer spectroscopy study

Studying Cyanobacteria by Means of Fluorescence Methods: A Review

Elevated Temperature Stress Effects on Photosystems: Characterization and evaluation of the nature of heat induced impairments

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Inorganic Fe²⁺ formation upon Fe‐S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mössbauer spectroscopy study

Inorganic Fe²⁺ formation upon Fe‐S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mössbauer spectroscopy study