Front. Plant Sci. Frontiers in Plant Science Front. Plant Sci. 1664-462X Frontiers Media S.A. 10.3389/fpls.2020.631667 Plant Science Correction Corrigendum: Membrane Inlet Mass Spectrometry: A Powerful Tool for Algal Research Burlacot Adrien † Burlacot François † Li-Beisson Yonghua † Peltier Gilles * † Aix Marseille Univ, Commissariat à l'énergie Atomique et aux énergies Alternatives (CEA), Centre National de la Recherche Scientifique (CNRS), Institut de Biosciences et Biotechnologies d'Aix- Marseille (BIAM), CEA Cadarache, Saint Paul-Lez-Durance, France

Edited by: Pietro Franceschi, Fondazione Edmund Mach, Italy

Reviewed by: Giuseppe Pieraccini, University of Florence, Italy

 *Correspondence: Gilles Peltier gilles.peltier@cea.fr

This article was submitted to Technical Advances in Plant Science, a section of the journal Frontiers in Plant Science

†ORCID: Adrien Burlacot orcid.org/0000-0001-7434-6416 François Burlacot orcid.org/0000-0001-9783-6848 Yonghua Li-Beisson orcid.org/0000-0003-1064-1816 Gilles Peltier orcid.org/0000-0002-2226-3931

 22 12 2020 2020 11 631667 20 11 2020 03 12 2020 Copyright © 2020 Burlacot, Burlacot, Li-Beisson and Peltier. 2020 Burlacot, Burlacot, Li-Beisson and Peltier

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 A Corrigendum on Membrane Inlet Mass Spectrometry: A Powerful Tool for Algal Research by Burlacot, A., Burlacot, F., Li-Beisson, Y., and Peltier, G. (2020). Front. Plant Sci. 11:1302. doi: 10.3389/fpls.2020.01302 gas exchange photosynthesis carbonic anhydrase CO2 concentrating mechanism O2 evolution H2 production microalgae cyanobacteria

In the original article, in the paragraph on the “Assessment of Photosynthetic Oxygen Exchange,” we defined the O2 uptake rate with a negative value when oxygen is consumed. Although it has been historically the first way to define it (Hoch and Kok, 1963), it makes more sense to use a positive value as adopted later by Radmer and Kok (1976) because a negative uptake would mean the usage of a double negative which implies production.

Therefore, Equations (1), (2), and (3) should be read;

O2 Uptake =-v 18O2×(1+C 16O2(t)C 18O2(t)) O2 Evolution =v 16O2-v 18O2×C 16O2(t)C 18O2(t) Net O2 =O2 Evolution-O2 Uptake

As a consequence, the plots shown on the original Figure 5 have been replaced by the attached Figure 5.

In vivo measurements of photosynthetic O2 exchange in the presence of 18O-labeled O2. (A) Schematic view of oxygen exchange illustrated in C. reinhardtii. While photosystem II (PSII) produces unlabeled O2 from the photolysis of H2O, oxygen uptake mechanisms consume both 18O-labeled and unlabeled O2 (B) 16O2 and 18O2 concentrations measured in C. reinhardtii cells during dark–light transients. (C,D) Calculated cumulated O2 exchanges (C) and the corresponding O2 exchange rates (D) for the same experiment. Cells were grown photoautotrophically in air, centrifuged and resuspended in fresh medium at a concentration of 20 μg Chl ml−1. Upon addition of 5 mM HCO3-, 18O2 was injected inside the cell suspension, and the reaction vessel was closed. After 5 min of dark adaptation, green light was turned on (500 μmol photon m−2 s−1) for 10 min. Levels of 16O2 and 18O2 were recorded at respective m/z = 32 and 36. O2 Uptake (red), O2 Evolution (blue), and Net O2 production (black) were calculated as described; cumulated gas exchange were calculated by directly integrating obtained exchange rates. To limit noise on the exchange rates graphic, data shown in (D) are integrated with a sliding average of 30 s wide.

The authors would like to thank Dr. Duncan Fitzpatrick for highlighting this problem and for suggesting changes to increase clarity of the article.

The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.

References Hoch G. Kok B. (1963). A mass spectrometer inlet system for sampling gases dissolved in liquid phases. Arch. Biochem. Biophys. 101, 160–170. 10.1016/0003-9861(63)90546-013954892 Radmer R. J. Kok B. (1976). Photoreduction of O2 pimes and replaces CO2 assimilation. Plant Physiol. 58, 336–340. 10.1104/pp.58.3.33616659674