Ecological selection pressures for C4 photosynthesis in the grasses.

C4 plants compose only 3 percent of flowering plant species, yet account for about 25 percent global terrestrial productivity. About 60% of C4 species are grasses, and they dominate the world's grassland and savanna biomes, particularly those in warmer, lower latitude areas. Their ecological success results from the way these species concentrate and then fix carbon dioxide in order to power photosynthesis. While the most well known C4 plants are maize and sugar cane, both of which are critical to human consumption, there is a growing interest in their use as biofuels in order to capture carbon from the atmosphere to mitigate increasing global carbon dioxide levels.

Ecological selection pressures for C 4 photosynthesis in the grasses.

Ecological selection pressures for C4 photosynthesis in the grasses.

Ecological selection pressures for C 4 photosynthesis in the grasses

"The idea that C4 grasses originated prior to global decreases in carbon dioxide levels requires us to reevaluate the way we think about the evolution of C4 photosynthesis," said Dr. Nelson. "This new information should encourage the examination of alternate evolutionary selection pressures, such as warm temperatures or dry climates."

Ecological selection pressures for C4 photosynthesis in the grasses

Osborn CP and Freckleton RP (2009) Ecological selection pressures for C4 photosynthesis in the grasses. Proceedings of the Royal Society B‐Biological Sciences 276: 1754–1760.


C 4 carbon fixation or the Hatch-Slack ..

seem to have paved the way for C4, ..

The Ecology of Photosintesis Pathways | Photosynthesis …