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. 2012 Mar 1;12(3):2851–2873. doi: 10.3390/s120302851

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© 2012 by the authors; licensee MDPI, Basel, Switzerland

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 6. — Overall effect of AHLs on various biological processes of peanut-nodulating strains.

Graphic obtained from PCA using the software InfoStat version 2.0. Solid diamonds indicate various combinations of AHL type (C10: 3OC₁₀; C12: 3OC₁₂; C14: 3OC₁₄) and concentration (low: 5 μM; medium: 10 μM; high: 20 μM). Open circles indicate the biological variables measured for each strain: motility (Mot), biofilm formation ability (Biof), and cell aggregation (Agg). The angles formed between the straight lines indicate the degree of correlation between variables. PC1: Principal Component 1; PC2: Principal Component 2.