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. 2019 Aug 22;10:1903. doi: 10.3389/fmicb.2019.01903

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Copyright © 2019 Fernández-Juárez, Bennasar-Figueras, Tovar-Sanchez and Agawin.

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) and the copyright owner(s) 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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Linear regression analyses (A) between P-cellular content and N₂ fixation and (B) between P and Fe-cellular content. Cellular content was measured in [Low ${NO}_{3}^{-}$ ] using pooled data from all ${P O}_{4}^{3 -}$ and Fe combination treatments.