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. 2019 Feb 25;10:290. doi: 10.3389/fmicb.2019.00290

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Copyright © 2019 Suárez-Moreno, Vinchira-Villarraga, Vergara-Morales, Castellanos, Ramos, Guarnaccia, Degrassi, Venturi and Moreno-Sarmiento.

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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Evaluation of Streptomyces strains for key traits related to direct plant growth promotion. Bars correspond to (A) Phosphate solubilization assay or (B) Indoleacetic Acid production. The results are means of three values ± SD of three independent biological replicates. Means were compared with ANOVA analysis in combination with Tukey post-test. Means were considered statistically different when p < 0.05, and bars sharing a letter are not statistically different. (C) Qualitative phosphate solubilization assay, (D) Cellulase qualitative activity assay, (E) Siderophores qualitative production assay, (F) Protease qualitative production assay.