Differential Inhibition of Photochemical and Dark Reactions in Photosynthesis by Inorganic Compounds

Greenfield, Sydney S.

doi:10.1126/science.93.2423.550

Cited by 6 publications

(2 citation statements)

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“…The relative rates represent the rate in the different cultures at a given time divided by the rate in the same culture when it was four days old. Four-day-old cultures were chosen as the standards because cultures of this age have been used extensively in investigations of photosynthesis (Curry and Trelease, 1935;Craig and Trelease, 1937;Pratt and Trelease, 1938;Sargent, 1940;Greenfield, 1941Greenfield, , 1942 and in numerous growth studies (Pratt, 1938(Pratt, , a, b, 1940Trelease and Selsam, 1939).…”

Section: Robertson Prattmentioning

confidence: 99%

Studies on Chlorella Vulgaris. Vii. Influence of the Age of the Culture on the Rates of Photosynthesis and Respiration

Pratt

1943

American J of Botany

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Section: Robertson Prattmentioning

confidence: 99%

Studies on Chlorella Vulgaris. Vii. Influence of the Age of the Culture on the Rates of Photosynthesis and Respiration

Pratt

1943

American J of Botany

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“…Water in Plants varying osmotic concentration may affect the process through the dark or enzymatic reaction rather than through the Hght reaction (Greenfield, 1941(Greenfield, , 1942. Desiccation had Httle effect in subdued Hght but profoundly affected photosynthesis in strong light where the dark reaction is limiting.…”

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confidence: 99%

Water in the physiology of plants, by A. S. Crafts, H. B. Currier and C. R. Stocking.

Crafts¹

1949

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Dean. Translations of many foreign papers were kindly put at our disposal by Dr. F. J. Veihmeyer and Mr. T. C. Broyer. For encourage-ment throughout the preparation of the manuscript and aid in its final organization we are grateful to Dr. W. W. Robbins. This book has been produced during troubled times. Because publication has been delayed, many current papers are not cited in the text. Some of these we are reporting here in an effort to bring our Bibliography up-to-date.Workers on the properties of liquids and solutions are in general agreement that the unusual behavior of water results from coordination of its molecules by hydrogen bonding. Assuming a bonding energy of 4.25 K cal. per mole, Taft and Sisler (1947) calculate that, of the energy absorbed upon heating, 11 per cent is utilized in breaking bonds during melting of ice, 16 per cent is used raising the temperature from the melting to the boiling point, and "JZ per cent goes in the vaporization process.Weissler (1949), using the velocity of sound at different temperatures to determine coordination, concludes that water undergoes a decrease in association of about 7.2 per cent between 0°C. and 100°C. Sound waves will detect molecular aggregates that are stable for 10"*^s econds. A previous value of 13.2 per cent was found using Raman spectrum analysis. The difference is due to the fact that the latter method detects aggregates that are stable for only lO"'^'* seconds.In contrast to Taft and Sisler, Searcy (1949) calculates a value of 6.4 ± 0.5 K cal. for the H-bond energy in water. He concludes that repulsive as well as attractive forces contribute to the dipole energy.Using a new formula to determine an index of association in liquids, Parshad (1947) has calculated values between 240 and 325 for a series of non-polar compounds;

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Inhibitory Effects of Inorganic Compounds on Photosynthesis in Chlorella

Greenfield

1942

American J of Botany

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Differential Inhibition of Photochemical and Dark Reactions in Photosynthesis by Inorganic Compounds

Cited by 6 publications

References 1 publication

Studies on Chlorella Vulgaris. Vii. Influence of the Age of the Culture on the Rates of Photosynthesis and Respiration

Studies on Chlorella Vulgaris. Vii. Influence of the Age of the Culture on the Rates of Photosynthesis and Respiration

Water in the physiology of plants, by A. S. Crafts, H. B. Currier and C. R. Stocking.

Inhibitory Effects of Inorganic Compounds on Photosynthesis in Chlorella

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