Oxygen evolution and photoreduction in adapted Scenedesmus

Horwitz, Leonard; Allen, F.L.

doi:10.1016/0003-9861(57)90535-0

Cited by 17 publications

(2 citation statements)

References 19 publications

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“…From these considerations it is possible to improve on equations 2 and 3, which were first approximations involving only gas phase quantities, by substitution of corresponding expressions based on liquid phase quantities obtained by taking into account the diffusion barrier at the gas-liquid interface. Corrections of this sort also were applied to mass spectrometer data by Horwitz and Allen (12). for which the following symbols are defined (for the ase where 02 is the gas considered): P and U = production and consumption rates for Figure 5 shows the relation between rate of C02 utilization and 02 production.…”

Section: Brown'n and Weis-relation Of Respiration And Photosynthesismentioning

confidence: 99%

Relation Between Respiration and Photosynthesis in the Green Alga, Ankistrodesmus braunii.

Brown

Weis

1959

Plant Physiol.

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and c1 would be an underestimate of p, at least during the early stages of equilibration lag. If the vessels were paired for oxygen (1) then a = a' and cl = pl { a K,/Kl -k2/k1 } If, however, there was a big enough burst of CO2 during this period then c1 could exceed 3,k. That is there could be an apparent burst of oxygen.Sufficient has been said to show that estimates of rates of gas production from manometer readings over a relatively short period, subsequent to a change of conditions which result in a change in rate, can be misleading. LITERATURE CITED

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Section: Brown'n and Weis-relation Of Respiration And Photosynthesismentioning

confidence: 99%

Relation Between Respiration and Photosynthesis in the Green Alga, Ankistrodesmus braunii.

Brown

Weis

1959

Plant Physiol.

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“…All of this has been known for many years (5,8,14,15,20 (6) or by inhibiting 02 evolution either by mutation (3) or with specific poisons which still permit photoreduction (e.g., o-phenanthroline [7]; DCMU [1]). activation of the hydrogenase, one can see in Figure 2 a strong oxy-hydrogen reaction during the following dark period for the sample without DCMU.…”

Section: Methodsmentioning

confidence: 99%

The Gas Exchange of Hydrogen-adapted Algae as Followed by Mass Spectrometry

Stuart

Gaffron

1972

Plant Physiol.

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C02 + 4H20 + P > (CH20) + 02 + 3H20 (1) A mass spectrometer inlet and an oxygen electrode in the same vessel allowed the continuous recording of the gases exchanged (H2, C02, 02) by hydrogenase-containing anaerobically adapted Scenedesmius obliquus strain D, (Gaffron) and Chlorella fusca Shihira et Krauss (= pyrenoidosa) 211-15. A light intensity which produces more photosynthetic oxygen than the cells can re-reduce to water leads to de-adaptation and the substitution of normal photosynthesis for photoreduction. The sequence of these metabolic events was recorded in a matter of a few minutes. Upon exposure of these adapted algae to light, an evolution of hydrogen lasting up to 60 seconds preceded any other light-dependent gas exchange. In the presence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea, this initial hydrogen production was inhibited approximately 50%, pointing to a contribution of electrons by photosystem II. At very low hydrogen tensions (0

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Hydrogen metabolism of green algae: discovery and early research — a tribute to Hans Gaffron and his coworkers

Homann

Discoveries in Photosynthesis

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Oxygen evolution and photoreduction in adapted Scenedesmus

Cited by 17 publications

References 19 publications

Relation Between Respiration and Photosynthesis in the Green Alga, Ankistrodesmus braunii.

Relation Between Respiration and Photosynthesis in the Green Alga, Ankistrodesmus braunii.

The Gas Exchange of Hydrogen-adapted Algae as Followed by Mass Spectrometry

Hydrogen metabolism of green algae: discovery and early research — a tribute to Hans Gaffron and his coworkers

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