STUDIES ON PHOTOSYNTHESIS

Studies on Photosynthesis

1. The effect on oxygen evolution of Chlorella vulgaris produced by light intensities up to about 40,000 f.-c. has been studied by the use of the Warburg technique. 2. Above a certain critical intensity, which is determined by the previous history of the cells, the rate of oxygen evolution decreases from the maximum to another constant rate. This depression is at first a completely reversible e...

Further studies on the photosynthesis of carrot tissue cultures.

The influence of kinetin and sucrose on the photosynthetic activity of carrot (Daucus carota) tissue cultures in relation to growth was investigated. The results showed that light contributes heavily to the growth of tissue cultures measured in terms of fresh and dry weight and cell division activity. In light, the fresh weight, dry weight, and number of cells per explant were about or more tha...

Topical Reviews on Photosynthesis Improvement Improving Photosynthesis

Photosynthesis is the basis of plant growth, and improving photosynthesis can contribute toward greater food security in the coming decades as world population increases. Multiple targets have been identified that could be manipulated to increase crop photosynthesis. The most important target is Rubisco because it catalyses both carboxylation and oxygenation reactions and the majority of respon...

Stress Effects on Photosynthesis

Limits on Natural Photosynthesis

Photosynthesis in nature does not use the far infrared part of the solar spectrum (λ > 900 nm), comprising about 30% of the incoming solar energy. By simple thermodynamic arguments it is explained that this is due to the unavoidable back reactions during the night. It follows that λ ≈ 900 nm provides a natural limit on artificial photosynthesis. The same limit holds for a two-tandem Si solar cell.