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. 2021 Apr 13;12:637582. doi: 10.3389/fpls.2021.637582

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Copyright © 2021 Anzalone, Di Guardo, Bella, Ghadamgahi, Dimaria, Zago, Cirvilleri and Catara.

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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Principal component analysis (PCA) of the characteristics related to the collection of 424 bacterial isolates. (A) The first two principal components are shown in a biplot, and bacterial isolates are colored according to the farm on which they were isolated. (B) Loading plot of the 10 traits used to compute the PCA, namely, antagonist activity against Cmm, Pco, Pto, Xep, and Fol (Cmm, Pco, Pto, Xep, and Fol), fluorescence on King’s medium B agar (Fluor), Gram reaction (Gram), phosphate solubilization (Phos_sol), salt tolerance (Salt_tol), and siderophore production (Sid_prod). (C) Heatmap of the pairwise correlations between the traits analyzed.