id:"swepub:oai:DiVA.org:umu-194748"
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03653naa a2200445 4500 | |
| 001 | oai:DiVA.org:umu-194748 | |
| 003 | SwePub | |
| 008 | 220516s2022 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1947482 URI |
| 024 | 7 | a https://doi.org/10.1111/nph.179572 DOI |
| 040 | a (SwePub)umu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Wieloch, Thomas,d 1979-u Umeå universitet,Institutionen för medicinsk kemi och biofysik4 aut0 (Swepub:umu)thwi0023 |
| 245 | 1 0 | a Anaplerotic flux into the Calvin–Benson cycle: hydrogen isotope evidence for in vivo occurrence in C 3 metabolism |
| 264 | c 2022-02-02 | |
| 264 | 1 | b John Wiley & Sons,c 2022 |
| 338 | a electronic2 rdacarrier | |
| 520 | a As the central carbon uptake pathway in photosynthetic cells, the Calvin–Benson cycle is among the most important biochemical cycles for life on Earth. A carbon flux of anaplerotic origin (i.e. through the chloroplast-localized oxidative branch of the pentose phosphate pathway) into the Calvin–Benson cycle was proposed recently.Here, we measured intramolecular deuterium abundances in leaf starch of Helianthus annuus grown at varying ambient CO2 concentrations, Ca. Additionally, we modelled deuterium fractionations expected for the anaplerotic pathway and compared modelled with measured fractionations.We report deuterium fractionation signals at H1 and H2 of starch glucose. Below a Ca change point, these signals increase with decreasing Ca consistent with modelled fractionations by anaplerotic flux. Under standard conditions (Ca = 450 ppm corresponding to intercellular CO2 concentrations, Ci, of 328 ppm), we estimate negligible anaplerotic flux. At Ca = 180 ppm (Ci = 140 ppm), more than 10% of the glucose-6-phosphate entering the starch biosynthesis pathway is diverted into the anaplerotic pathway.In conclusion, we report evidence consistent with anaplerotic carbon flux into the Calvin–Benson cycle in vivo. We propose the flux may help to: maintain high levels of ribulose 1,5-bisphosphate under source-limited growth conditions to facilitate photorespiratory nitrogen assimilation required to build-up source strength; and counteract oxidative stress. | |
| 650 | 7 | a NATURVETENSKAPx Biologix Botanik0 (SwePub)106072 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Biological Sciencesx Botany0 (SwePub)106072 hsv//eng |
| 653 | a Calvin–Benson cycle | |
| 653 | a flux estimation | |
| 653 | a glucose-6-phosphate shunt | |
| 653 | a hydrogen stable isotopes | |
| 653 | a nitrogen assimilation | |
| 653 | a oxidative pentose phosphate pathway | |
| 653 | a plant carbon metabolism | |
| 653 | a source–sink balance | |
| 700 | 1 | a Augusti, Angelau Research Institute on Terrestrial Ecosystems National Research Council Porano (TR) 05010 Italy4 aut |
| 700 | 1 | a Schleucher, Jürgen,c Professoru Umeå universitet,Institutionen för medicinsk kemi och biofysik4 aut0 (Swepub:umu)jusc0001 |
| 710 | 2 | a Umeå universitetb Institutionen för medicinsk kemi och biofysik4 org |
| 773 | 0 | t New Phytologistd : John Wiley & Sonsg 234:2, s. 405-411q 234:2<405-411x 0028-646Xx 1469-8137 |
| 856 | 4 | u https://doi.org/10.1111/nph.17957y Fulltext |
| 856 | 4 | u https://umu.diva-portal.org/smash/get/diva2:1658495/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print |
| 856 | 4 | u https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/nph.17957 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-194748 |
| 856 | 4 8 | u https://doi.org/10.1111/nph.17957 |
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