Isotope discrimination of carbonyl sulfide (34S) and carbon dioxide (13C, 18O) during plant uptake in flow-through chamber experiments

Baartman, Sophie L.; Driever, Steven M.; Wassenaar, Maarten L. J.; Kooijmans, Linda M. J.; Ubierna, Nerea; Mossink, Leon; Popa, Maria E.; Cho, Ara; Wingate, Lisa; Röckmann, Thomas; van Heuven, Steven M. A. C.; Krol, Maarten C.

doi:10.5194/bg-22-5683-2025

Articles | Volume 22, issue 20

https://doi.org/10.5194/bg-22-5683-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-22-5683-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 20

Research article

|

20 Oct 2025

Research article |

| 20 Oct 2025

Isotope discrimination of carbonyl sulfide (³⁴S) and carbon dioxide (¹³C, ¹⁸O) during plant uptake in flow-through chamber experiments

Sophie L. Baartman, Steven M. Driever, Maarten L. J. Wassenaar, Linda M. J. Kooijmans, Nerea Ubierna, Leon Mossink, Maria E. Popa, Ara Cho, Lisa Wingate, Thomas Röckmann, Steven M. A. C. van Heuven, and Maarten C. Krol

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Cumulative views and downloads (calculated since 10 Feb 2025)

Month	HTML	PDF	XML	Total
Feb 2025	178	24	8	210
Mar 2025	114	26	4	144
Apr 2025	96	130	10	236
May 2025	50	24	8	82
Jun 2025	100	16	12	128
Jul 2025	70	18	6	94
Aug 2025	304	6	0	310
Sep 2025	1,070	8	22	1,100
Oct 2025	222	40	10	272
Nov 2025	130	51	19	200
Dec 2025	156	68	25	249
Jan 2026	148	58	11	217
Feb 2026	165	55	13	233
Mar 2026	158	79	15	252
Apr 2026	98	53	9	160
May 2026	24	9	7	40

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Short summary

Carbonyl sulfide (COS) is a proposed tracer for gross primary production. For the first time, COS and carbon dioxide (CO₂) uptake fluxes and isotope discrimination were jointly measured in sunflower and papyrus plants, using a flow-through plant chamber approach and varying light availability. COS isotope discrimination did not differ significantly between the species, nor with changes in light. CO₂ fluxes and isotope values provided additional valuable information for data interpretation.