Evolutionary stability in a 400-million-year-old heritable facultative mutualism: evolution in glomeromycota-glomeribacter symbiosis

Mondo, S. J., Toomer, K. H., Morton, J. B., Lekberg, Y. & Pawlowska, T. E.  (2012).  Evolutionary stability in a 400-million-year-old heritable facultative mutualism: evolution in glomeromycota-glomeribacter symbiosis.  Evolution  66, 2564–2576.