Energy metabolism in the cyanobacterium Plectonema boryanum. Oxidative phosphorylation and respiratory pathways

Matthijs, H.C.P.; Ludérus, Eva M.E.; Scholts, M.J.C.; Kraayenhof, Ruud

doi:10.1016/0005-2728(84)90214-7

Cited by 20 publications

(17 citation statements)

References 35 publications

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“…It will be interesting to study the pathway of signal transduction that shifts coupling of photosystem I from photosystem I1 to endogenous electron donors even during photoautotrophic growth. Light-dependent donation of electrons by NADPH, NADH or organic acids to methyl viologen via photosystem I has been reported for cell-free membrane preparations from cyanobacteria including P. b o y n u m (Murai & Katoh, 1975;Matthijs et a/., 1984), Chlamydomonas (Godde, 1982) and greening potato tubers (Janave et a/., 1991). Light-dependent utilization of reduced carbon sources by certain cyanobacteria, including Agmenellum (Lambert & Stevens, 1986), Jynechogstis (Jansson et ul., 1987), Plertonema (Smoker & Barnum, 1990) and Oscidatoria (Gallon e t a/., 1991), has been reported.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen fixation by Plectonema boryanum has a photosystem II independent component

Misra¹,

Tuli²

1994

Microbiology

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The non-heterocystous filamentous cyanobacterium Pledonema boryanum showed a several-fold decline in photosystem II dependent 0, evolution during the diazotrophic phase of growth. A sharp fall in the amounts of lightharvesting pigments and an uncoupling between the electron transfer from the photosystem II complex to the quinone acceptors may lead to the depression of light-dependent 0, evolution during the diazotrophic phase. Nitrogen fixation as well as CO, fixation required light, but were partly supported independently of photosystem II. A stimulation of photosystem I and a depression of photosystem II occurred during the diazotrophic phase of a nitrogen-fixing culture of P. boryanum.

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Section: Resultsmentioning

confidence: 99%

Nitrogen fixation by Plectonema boryanum has a photosystem II independent component

Misra¹,

Tuli²

1994

Microbiology

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“…But the rate of this quenching was also decreased by depletion of O2 (Figure 4a). In fact, antimycin is also known to inhibit electron transfer at site 1 in mitochondria [19] and Mattijs et al [17] have postulated that antimycin cuts the dark respiratory electron transfer in thylakoid of bluegreen algae above the quinone pool. So it can be taken as a working hypothesis that both phenomena, cyclic pathway as well as chlororespiration, are inhibited by antimycin.…”

Section: Discussionmentioning

confidence: 99%

Chlorophyll fluorescence transients from the diatom Phaeodactylum tricornutum: relative rates of cyclic phosphorylation and chlororespiration

et al. 1987

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In Phaeodactylum tricornutum cells kept 30 min in the dark, induction of fluorescence showed the well-known levels OIDPSMT. The decrease of MT was the most important when the intensity of excitation light was high. It was mainly due to the photochemical quenching. After addition of DCMU (2 to 20 μM), a quenching qE was still observed: this quenching, cancelled by NH4Cl (2 to 20 mM) is attributed to ΔpH. This qE was also inhibited by antimycin, an inhibitor of cyclic phosphorylation and may be of chlororespiration above plastoquinones. Anaerobiosis also decreased it. We can infer that chlororespiration also plays a part in the formation of the ΔpH in the presence of DCMU. After 30 mn of preillumination in red light, the levels P and M were lower and the quenching in presence of DCMU was no more observed: thus, neither the chlororespiration nor the cyclic phosphorylation were active, unless the activity of ATPase was much more important. So, in diatoms, one at least of the above cited phenomena can be modulated by light.

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“…On the other hand, sound data have been reported by "Peschek and coworkers, mainly for Anacystis nidulans (= Synechococcus), demonstrating a localization of at least part of RET on the cytoplasmic membrane, while the other part is localized on the thylakoids (for review see Peschek 1984). A third model suggests that part of RET is with the thylakoid membrane (where oxidation of reduced pyridine nucleotides takes place) and part with the cytoplasmic membrane which is suggested to be the site of cytochrome oxidase, the electrons being shuttled by some unknown mediator (Matthijs et al 1984b. It seems, however, possible that different cyanobacteria exhibit different organization concerning the localization of respiratory electron transport (compare B6ger 1984, Nitschmann andPeschek 1985).…”

Section: Localization Of Respiratory Electron Transportmentioning

confidence: 99%

Interaction of photosynthesis, respiration and nitrogen fixation in cyanobacteria

1988

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Energy metabolism in the cyanobacterium Plectonema boryanum. Oxidative phosphorylation and respiratory pathways

Cited by 20 publications

References 35 publications

Nitrogen fixation by Plectonema boryanum has a photosystem II independent component

Nitrogen fixation by Plectonema boryanum has a photosystem II independent component

Chlorophyll fluorescence transients from the diatom Phaeodactylum tricornutum: relative rates of cyclic phosphorylation and chlororespiration

Interaction of photosynthesis, respiration and nitrogen fixation in cyanobacteria

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