Light dependent oxygen uptake by the blue green alga anacystis nidulans

Hammans, J. W. Kleinen; Hendriks, Giel; Teerlink, Tom

doi:10.1016/0006-291x(77)90620-9

Cited by 10 publications

(1 citation statement)

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“…Goedheer and Hammans (1975) observed excitation energy transfer from several pigments to P750; and Hammans et al (1977), however, established that P750 actually initiated oxygen uptake in A. nidulans . Further, Hammans (1978) showed that P750 sensitized photo-oxidation of several endogenous reductants in A. nidulans ; however, these reductants did not serve as electron donors to PSI, nor were they oxidized in any Chl-sensitized reactions; there was, however, a hint that excitation of both P750 and Chl may cause the formation of singlet oxygen.…”

Section: Discovery Of a New Pigment P750 In Anacystis Nidulansmentioning

confidence: 99%

Adventures with cyanobacteria: a personal perspective

Govindjee¹

2011

Front. Plant Sci

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Cyanobacteria, or the blue-green algae as they used to be called until 1974, are the oldest oxygenic photosynthesizers. We summarize here adventures with them since the early 1960s. This includes studies on light absorption by cyanobacteria, excitation energy transfer at room temperature down to liquid helium temperature, fluorescence (kinetics as well as spectra) and its relationship to photosynthesis, and afterglow (or thermoluminescence) from them. Further, we summarize experiments on their two-light reaction – two-pigment system, as well as the unique role of bicarbonate (hydrogen carbonate) on the electron-acceptor side of their photosystem II, PSII. This review, in addition, includes a discussion on the regulation of changes in phycobilins (mostly in PSII) and chlorophyll a (Chl a; mostly in photosystem I, PSI) under oscillating light, on the relationship of the slow fluorescence increase (the so-called S to M rise, especially in the presence of diuron) in minute time scale with the so-called state-changes, and on the possibility of limited oxygen evolution in mixotrophic PSI (minus) mutants, up to 30 min, in the presence of glucose. We end this review with a brief discussion on the position of cyanobacteria in the evolution of photosynthetic systems.

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Section: Discovery Of a New Pigment P750 In Anacystis Nidulansmentioning

confidence: 99%