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. 2020 Aug 15;8(8):1242. doi: 10.3390/microorganisms8081242

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© 2020 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Correlations between taxonomic markers and characteristic spectral regions of the FTIR spectrum of both control and stressed cells. Maximum correlation values between each taxonomic marker and fatty acids (W1), amides (W2), mixed (W3) and carbohydrates (W4) spectral areas are reported for both control (A) and stressed (B) cells. The latter analysis was carried out grouping together data from the three stressing conditions tested. Colored labels refer to markers displaying correlation values higher than 0.75 threshold, represented by the red dashed lines.