title: C(4) photosynthesis: differentiating causation and coincidence.
abstract: Determination of the historical causes of organismal adaptations is difficult, but a recent study has suggested that at least one of the transitions to C(4) photosynthesis was directly facilitated by changes in atmospheric CO(2) levels. But what about the other 50+ origins of C(4)?
authors.affiliation: School of Biological Sciences, Washington State University, Pullman, Washington 99164-4236, USA. roalson@mail.wsu.edu
authors.forename: Eric H
authors.initials: EH
authors.lastname: Roalson
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism*; D010788:Photosynthesis / Q000502:physiology*; D010802:Phylogeny; D006109:Poaceae / Q000378:metabolism*
chemical_list: D002245:Carbon Dioxide