Untersuchungen über die Assimilation der Kohlensäure

Willstätter, Richard; Stoll, A.

doi:10.1002/cber.19150480242

Cited by 51 publications

(33 citation statements)

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“…The moss was able to stand as much as 24 hours of anaerobic conditions and eventually to assimilate after an hour or two of no oxygen production. Willstatter and Stoll (1918) record a similar experience with another moss, Polytrichum. To these experiments we shall refer later.…”

Section: Resultsmentioning

confidence: 65%

“…is small enough compared with that of i the slope of the log P curve can still increase, since the decrease of the second component * That some photosynthetic cells have S in great excess is suggested by the fact that leaves of yellow varieties have practically the same assimilatory activity when the illumination is high as the leaves of green varieties of the same species with a far greater concentration of chlorophyll (Willstatter and Stoll, 1918 of the above expression can be less than the increase in the first component, (ix + kd j(i + hf). It is clear then that our present theory, in contrast with our first can account for the changing slope of the curve of log (1 -R /R x) against time.…”

Section: S B/(and4 -F-k3)(kmentioning

confidence: 99%

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Experimental researches on vegetable assimilation and respiration. XXI.—Induction phases in photosynthesis and their bearing on the mechanism of the process

Briggs

1933

Proc. R. Soc. Lond. B.

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In many reactions proceeding in living cells the concentration of the reactants changes with time, and hence our knowledge of the nature of the mechanism cannot proceed very far without means of determining, directly or indirectly, the changes of concentration. In photosynthesis the reactants carbon dioxide and water can often be readily maintained at a constant level, and consequently investigations have been centred on the relation between the rate of photosynthesis, when it has reached a stationary value, and the con centration of the reactants and various inhibitors and accelerators. Transitions from one stationary state to another, consequent upon a change in intensity of one of the determining factors, have received little attention. Investigation of such transitions may throw light on the mechanism of the process itself, and possibly on the interaction of this and other processes in the cell. The transition to be considered in this paper is that taking place in the rate of photosynthesis when chlorophyll-containing cells pass from darkness to

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Section: Resultsmentioning

confidence: 65%

Section: S B/(and4 -F-k3)(kmentioning

confidence: 99%

Experimental researches on vegetable assimilation and respiration. XXI.—Induction phases in photosynthesis and their bearing on the mechanism of the process

Briggs

1933

Proc. R. Soc. Lond. B.

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“…The mykotrophic orchid Neottia nidus-avis has been reported unable to catalyze photosynthesis despite the fact that the plant contains Chl a and xanthophyll (15,17,18). The plant appears yellowish brown because part of the carotenoid absorption is shifted into the green spectral region (4,14).…”

mentioning

confidence: 99%

Cyclic Photophosphorylation in the Mykotrophic Orhid Neottia nidus-avis

Menke¹,

Schmid²

1976

Plant Physiol.

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The mykotrophic orchid Neottia nidus-avis (L.) Rich. is not able to evolve oxygen in the light. Plastid preparations from the lip (labellum) of the orchid perform a photosystem I-dependent photoreduction of methylviologen with the artificial electron donor couple 2,6-dichlorophenol indophenol ascorbate. Photosystem II reactions such as the ferricyanide Hill reaction or the photoreduction of 2,6-dichlorophenol indophenol with diphenylcarbazide as the electron donor are not functioning. The plastids exhibit phenazine methosulfate-mediated cyclic photophosphorylation. After infiltration with 32P-labeled phosphate the labellum forms 32P-ATP in the light. This rate of ATP formation is enhanced by additional infiltration of phenazine methosulfate prior to illumination. The brown color of the plant is caused by an absorption shift of carotenoids to longer wavelength. By comparison of absorption spectra with the fluorescence excitation spectra of plastid preparations and of the extracted pigments we show that no appreciable energy transfer from carotenoids to chlorophyll occurs.

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“…Reflectance and transmittance of a plant leaf have been explained on the basis of critical reflection of light at the cell wall-air interface of the spongy mesophyll tissue (22). A hypothesis has been advanced that leaf reflectance derives from the diffuse characteristics of plant cell walls (19).…”

mentioning

confidence: 99%