The Charophyceae are the green algae closest to plants.
Many of the complex traits related to sexual reproduction, photosynthesis, and other plant characters, evolved first in charophyceans. Analysis of cpDNA (chloroplast DNA) shows that characteristics of plant chloroplasts evolved first in the charophycean genera Staurastrum and Zygnema.
- Campbell N.A. & Reece J.B. 2005. Biology. 7th ed, Cummings, San Francisco.
- Guiry M.D. & Guiry G.M. 2007. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. AlgaeBase.org searched on 13 December 2007
- Hoek C. van den, Mann D.G. & Jahns H. M. 1995. Algae: an introduction to phycology Cambridge University Press, Cambridge. ISBN 0-521-30419-9
- McCourt R.M; Chapman R.L; Buchheim M. & Mishler B.D. “Green plants” Accessed 13 December 2007
- Delwiche C.F. “Charophycean green algae”. Accessed 13 December 2007
- Turmel M; Otis C. & Lemieux C. 2005. The complete chloroplast DNA sequences of the Charophycean green algae Staurastrum and Zygnema reveal that the chloroplast genome underwent extensive changes during the evolution of the Zygnematales. BMC Biology 3:22