{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,20]],"date-time":"2026-05-20T09:08:08Z","timestamp":1779268088156,"version":"3.51.4"},"reference-count":77,"publisher":"Oxford University Press (OUP)","issue":"10","license":[{"start":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T00:00:00Z","timestamp":1770768000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"name":"Scientific Research Foundation Flanders","award":["G.0319.13N"],"award-info":[{"award-number":["G.0319.13N"]}]},{"name":"SB fellowship","award":["1S37716N"],"award-info":[{"award-number":["1S37716N"]}]},{"name":"junior post-doc fellowship","award":["1271122N"],"award-info":[{"award-number":["1271122N"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,5,20]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>A considerable quantity of locally respired CO2 in stems can be assimilated via woody tissue photosynthesis (Pwt). Hence, Pwt locally provides carbon fuelling radial stem growth and therefore plays a major role in the stem carbon balance. It is, however, not straightforward to quantify or visualize its dynamic behaviour, especially on small spatial scales. To assess Pwt we traced xylem-transported 11CO2 in detached branches of Populus tremula L. and used positron autoradiography to visualize and quantify its dynamics on a submillimetre scale, while manipulating light exposure to the branch. Experiments using 18F-fluoride were conducted to study water transport. In light-exposed branch segments 11C was found to be highly retained whereas light-excluded parts solely indicated transport of 11CO2 by the sap. The latter results were confirmed by visualizing sap transport through 18F-labelling. Analogue experiments with 13CO2 unambiguously revealed assimilation of xylem-transported CO2 into fructose and glucose, and also suggest light-independent fixation in light-excluded parts. The combination of stable and unstable isotope experiments highlight that (i) Pwt is highly light-responsive in young branches; and (ii) xylem-transported CO2 is fixed by photosynthetic cells in bark and locally provides sugars for growth and energy to woody tissues.<\/jats:p>","DOI":"10.1093\/jxb\/erag059","type":"journal-article","created":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T12:27:51Z","timestamp":1770726471000},"page":"3069-3082","source":"Crossref","is-referenced-by-count":0,"title":["Assimilation dynamics of xylem-transported CO2 by woody tissue photosynthesis revealed with 11C- and 13C-labelling"],"prefix":"10.1093","volume":"77","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6634-5042","authenticated-orcid":false,"given":"Jens","family":"Mincke","sequence":"first","affiliation":[{"name":"Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University , 9000 Ghent ,","place":["Belgium"]},{"name":"Medical Imaging and Signal Processing\u2014Innovative Flemish in Vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University , 9000 Ghent ,","place":["Belgium"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-4966-3212","authenticated-orcid":false,"given":"Chiel","family":"Salaets","sequence":"additional","affiliation":[{"name":"Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University , 9000 Ghent ,","place":["Belgium"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jan","family":"Courtyn","sequence":"additional","affiliation":[{"name":"Medical Molecular Imaging and Therapy, Ghent University Hospital , 9000 Ghent ,","place":["Belgium"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3988-5980","authenticated-orcid":false,"given":"Christian","family":"Vanhove","sequence":"additional","affiliation":[{"name":"Medical Imaging and Signal Processing\u2014Innovative Flemish in Vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University , 9000 Ghent ,","place":["Belgium"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2377-3968","authenticated-orcid":false,"given":"Stefaan","family":"Vandenberghe","sequence":"additional","affiliation":[{"name":"Medical Imaging and Signal Processing\u2014Innovative Flemish in Vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University , 9000 Ghent 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