American Association for the Advancement of Science, Science, 6323(355), p. 358-358, 2017
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Norby et al . center their critique on the design of the data set and the response variable used. We address these criticisms and reinforce the conclusion that plants that associate with ectomycorrhizal fungi exhibit larger biomass and growth responses to elevated CO 2 compared with plants that associate with arbuscular mycorrhizae.