2997 K
49 pp.
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TitleThe Path of Carbon in Photosynthesis XX. The Steady State
Author(s)Calvin, M.; Massini, Peter
Publication DateSeptember 1952
Report NumberUCRL--1950
Unique IdentifierACC0323
Other NumbersOSTI ID: 4378453; OSTI ID: 915410
Research OrgUniversity of California Radiation Laboratory, Berkeley; Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US) [LBL][LBNL]
Contract NoW-7405-eng-48; DE-AC02-05CH11231
Sponsoring OrgU.S. Atomic Energy Commission (AEC)
Subject14 Solar Energy; Carbon Cycle; Carbon Dioxide; Reduction; Chromatography; Photosynthesis; Respiration; Tracer Techniques; Glyceric Acid; Organic Phosphorus Compounds; Thioctic Acid
KeywordsBiology And Medicine; Algae; Carbon 14; Glyceric Acid; Labelled Compounds; Light; Metabolism; Organic Acids; Oxidation; Photochemistry; Plants; Reduction; Carbon; Photosynthetic Products; Plant Respiration
Related Web PagesMelvin Calvin and Carbon in Photosynthesis
AbstractThe separation of the phenomenon of photosynthesis in green plants into a photochemical reaction and into the light-dependent reduction of carbon dioxide is discussed, The reduction of carbon dioxide and the fate of the assimilated carbon were investigated with the help of the tracer technique (exposure of the planks to the radioactive C{sup 14}O{sub 2}) and of paper chromatography. A reaction cycle is proposed in which phosphoglyceric acid is the first isolable assimilations product. Analyses of the algal extracts which had assimilated radioactive carbon dioxide in a stationary condition ('steady-state' photosynthesis) for a long time provided further information concerning the proposed cycle and permitted the approximate estimation, for a number of compounds of what fraction of each compound was taking part in the cycle. The earlier supposition that light influences the respiration cycle was confirmed. The possibility of the assistance of {alpha}-lipoic acid, or of a related substance, in this influence and in the photosynthesis cycle, is discussed.
2997 K
49 pp.
View Document 

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