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Algal ancestor of land plants was preadapted for symbiosis

2015; National Academy of Sciences; Volume: 112; Issue: 43 Linguagem: Inglês

10.1073/pnas.1515426112

1091-6490

Pierre‐Marc Delaux, Guru Radhakrishnan, Dhileepkumar Jayaraman, Jitender Cheema, Mathilde Malbreil, Jeremy D. Volkening, Hiroyuki Sekimoto, Tomoaki Nishiyama, Michael Melkonian, Lisa Pokorny, Carl J. Rothfels, Heike Sederoff, Dennis Wm. Stevenson, Barbara Surek, Yong Zhang, Michael R. Sussman, Christophe Dunand, Richard J. Morris, Christophe Roux, Gane Ka‐Shu Wong, Giles Oldroyd, Jean‐Michel Ané,

Legume Nitrogen Fixing Symbiosis

Significance Colonization of land by plants was a critical event for the emergence of extant ecosystems. The innovations that allowed the algal ancestor of land plants to succeed in such a transition remain unknown. Beneficial interaction with symbiotic fungi has been proposed as one of these innovations. Here we show that the genes required for this interaction appeared in a stepwise manner: Some evolved before the colonization of land by plants and others first appeared in land plants. We thus propose that the algal ancestor of land plants was preadapted for interaction with beneficial fungi and employed these gene networks to colonize land successfully.