Calvin-type carbon dioxide fixation in sugarcane stalk parenchyma tissue.

Characterization of a Photosynthetic Mutant Strain of Chlamydomonas reinhardi Deficient in Phosphoribulokinase Activity.

A mutant strain of the unicellular green alga, Chlamydomonas reinhardi, is unable to fix carbon dioxide by photosynthesis because it is deficient in phosphoribulokinase activity. The absence of light-dependent carbon dioxide fixation in cells of the mutant strain supports the operation of the Calvin-Benson scheme of photosynthetic carbon dioxide fixation in this organism. No deficiency other th...

Obituary : A remembrance of Melvin

After a distinguished career of research and teaching, Melvin Calvin died in Berkeley, California on 8 January 1997, at the age of 85. Throughout his life, Calvin exhibited an intense curiosity that drove his scientific research. Although he may be best known for his contributions to our knowledge of photosynthetic carbon dioxide fixation and reduction, for which he was awarded the Nobel Prize ...

Carbon dioxide fixation by Rhodopseudomonas capsulatus.

Carbon dioxide fixation as a central redox cofactor recycling mechanism in bacteria.

The Calvin-Benson-Bassham cycle (Calvin cycle) catalyzes virtually all primary productivity on Earth and is the major sink for atmospheric CO(2). A less appreciated function of CO(2) fixation is as an electron-accepting process. It is known that anoxygenic phototrophic bacteria require the Calvin cycle to accept electrons when growing with light as their sole energy source and organic substrate...

UDP-Glucose-Dependent Sucrose Translocation in Tonoplast Vesicles from Stalk Tissue of Sugarcane.

Tonoplast vesicles isolated from stalk parenchyma tissue of sugarcane plants transport sucrose via a uridine diphosphate glucose (UDPGlc)-dependent group translocator. No sucrose transport via an ATP-dependent system could be detected. The products of UDPGlc uptake in the vesicles were sucrose and sucrose phosphate which, upon hydrolysis with alkaline phosphatase and invertase, showed that both...