Additional file 10.

Cell wall structure of G. intraradices spores of different ages. A, Open 30 day-old spore with subtending hypha, outside hyaline spore wall and inside pale yellow pigmented spore wall. B, Closer view of 60 day-old spore wall with bi-layered outer walls and laminated inner wall. C, Walls of 90 day-old mature spore with bi-layered outer wall and multi-laminated inner wall. Images were taken with DIC optical microscope. Scale bars represent 20 μm.

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Marleau et al. BMC Evolutionary Biology 2011 11:51   doi:10.1186/1471-2148-11-51