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. 2017 Jul 12;8:1196. doi: 10.3389/fpls.2017.01196

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Copyright © 2017 Isaac, Martin, de Melo Virginio Filho, Rapidel, Roupsard and Van den Meersche.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Principal components analysis of intraspecific variation in root functional traits in Coffea arabica. The PCA is based on root traits measured on 62 individual-plants, sampled across four different sites (open circles = CW, open triangles = HW, closed circles = CD, and closed triangles = HD). Dashed lines correspond to 95% confidence ellipses for C. arabica roots sampled at each site. PCA axis 1 scores were significantly different (p < 0.001) for CD as compared to CW, HW, and HD.