478 K
16 pp.
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TitleThe Path of Carbon in Photosynthesis VII. Respiration and Photosynthesis
Author(s)Benson, A. A.; Calvin, M.
Publication DateJuly 21, 1949
Report NumberAECU-413; UCRL--399
Unique IdentifierACC0310
Other NumbersOSTI ID: 4411691; OSTI ID: 910347
Research OrgErnest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US) [LBL] [LBNL]; University of California Radiation Laboratory, Berkeley, CA
Contract NoDE-AC02-05CH11231
Sponsoring OrgU.S. Atomic Energy Commission (AEC)
Subject59 Basic Biological Sciences; Algae; Autoradiography; Barley; Carbon; Carbon Dioxide; Chlorella; Chromatography; Glycolic Acid; Helium; Photosynthesis; Respiration; Scenedesmus; Seedlings; Succinic Acid; Biology And Medicine; Age; Air; Amino Acids; Biochemistry; Carbon 14; Cereals; Citric Acid; Fumaric Acid; Glutamic Acid; Labelled Compounds; Leaves; Light; Microorganisms; Organic Acids; Oxidation; Plants; Protozoa; Radioautography; Reduction; Saccharose; Sugars; Tissues; Tracer Techniques; Variations
KeywordsCarbon Isotopes
Related Web PagesMelvin Calvin and Carbon in Photosynthesis
AbstractThe relationship of respiration to photosynthesis in barley seedling leaves and the algae, Chlorella and Scenedesmus, has been investigated using radioactive carbon dioxide and the techniques of paper chromatography and radioautography. The plants are allowed to photosynthesize normally for thirty seconds in c{sup 14}O{sub 2} after which they are allowed to respire in air or helium in the light or dark. Respiration of photosynthetic intermediates as evidenced by the appearance of labeled glutomic, isocitric, fumaric and succinic acids is slower in the light than in the dark. Labeled glycolic acid is observed in barley and algae. It disappears rapidly in the dark and is maintained and increased in quantity in the light in C0{sub 2}-free air.
478 K
16 pp.
View Document 

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