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Photosynthesis: what color was its origin?

Jin Xiong

Author affiliations

Department of Biology, Texas A&M University, College Station, TX 77843, USA

Citation and License

Genome Biology 2006, 7:245  doi:10.1186/gb-2006-7-12-245

Published: 3 January 2007


Recent studies using geological and molecular phylogenetic evidence suggest several alternative evolutionary scenarios for the origin of photosynthesis. The earliest photosynthetic group is variously thought to be heliobacteria, proteobacteria or a precursor of cyanobacteria, organisms whose photosynthetic pigments make them different colors.