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. 2018 Nov 23;9:1662. doi: 10.3389/fpls.2018.01662

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Copyright © 2018 Guyonnet, Guillemet, Dubost, Simon, Ortet, Barakat, Heulin, Achouak and Haichar.

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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Incorporation of ¹³C-root exudates into microbial community DNA derived from the RAS of Dactylis glomerata plants after 1 week of ¹³CO₂ labeling. ¹²C (light) and ¹³C (heavy) DNA were separated by CsCl density gradient centrifugation. Total DNA was quantified fluorometrically (), and ¹³C (∂¹³C) values were measured by IRMS within gradient fractions (1–10) ().

Inline graphic — Incorporation of ¹³C-root exudates into microbial community DNA derived from the RAS of Dactylis glomerata plants after 1 week of ¹³CO₂ labeling. ¹²C (light) and ¹³C (heavy) DNA were separated by CsCl density gradient centrifugation. Total DNA was quantified fluorometrically (), and ¹³C (∂¹³C) values were measured by IRMS within gradient fractions (1–10) ().