Matches in SemOpenAlex for { <https://semopenalex.org/work/W3091387638> ?p ?o ?g. }
Showing items 1 to 56 of
56
with 100 items per page.
- W3091387638 abstract "<p>Carbon (C) assimilated in the canopy of trees is transported downwards via phloem to fuel metabolic processes, such as respiration of above- and below-ground tissues. &#160;Part of the respired CO<sub>2</sub> can be dissolved into xylem water and transported along the trunk up to the canopy, causing a CO<sub>2</sub> efflux which is dislocated from the site of respiration. While the individual processes of C transport in the phloem and xylem in trees have been comparatively well described, little is known on the linkage of xylem&#8211;phloem pathways of C and the potential of re-assimilation of root-respired C in the canopy.</p><p>In this study, we randomly assigned a set of five-year-old oak trees (<em>Quercus rubra</em>) to stem infusion of <sup>13</sup>CO<sub>2</sub> dissolved water (n=4) or <sup>13</sup>CO<sub>2</sub> canopy labeling treatment (n=3), thereby labeling xylem C flow and phloem C flow, respectively. Using high temporal resolution isotope ratio measurement by laser spectroscopy, we monitored <sup>13</sup>C in tissue and in respiratory CO<sub>2</sub> efflux resulting from phloem- and xylem-transported C to trace the fate of C from photosynthesis through the phloem and xylem to respiration and re-assimilation. We observed that CO<sub>2</sub> efflux was related to both phloem and xylem transport of <sup>13</sup>C and that a quick lateral transport of sugars occurred from phloem to xylem. Furthermore, we found evidence for re-assimilation of CO<sub>2</sub> transported through the xylem in branches and leaf petioles. The re-assimilated <sup>13</sup>C transported by the xylem was also found in stem tissues at various heights, 24 to 96 hours after labeling. Moreover, stem <sup>13</sup>CO<sub>2</sub> efflux showed a diurnal variation, suggesting a potential incorporation of recycled C into respiratory substrate at different stem heights shortly upon re-assimilation. Our results demonstrate a phloem&#8211;xylem C linkage leading to repeated coupling of assimilation and respiration, with consequences for whole tree C dynamics.</p>" @default.
- W3091387638 created "2020-10-08" @default.
- W3091387638 creator A5023470079 @default.
- W3091387638 creator A5045433459 @default.
- W3091387638 creator A5053228681 @default.
- W3091387638 creator A5054060684 @default.
- W3091387638 creator A5086550150 @default.
- W3091387638 date "2020-03-23" @default.
- W3091387638 modified "2023-09-27" @default.
- W3091387638 title "High temporal resolution 13C tracing to link xylem – phloem pathways of carbon in oak trees" @default.
- W3091387638 doi "https://doi.org/10.5194/egusphere-egu2020-1070" @default.
- W3091387638 hasPublicationYear "2020" @default.
- W3091387638 type Work @default.
- W3091387638 sameAs 3091387638 @default.
- W3091387638 citedByCount "0" @default.
- W3091387638 crossrefType "posted-content" @default.
- W3091387638 hasAuthorship W3091387638A5023470079 @default.
- W3091387638 hasAuthorship W3091387638A5045433459 @default.
- W3091387638 hasAuthorship W3091387638A5053228681 @default.
- W3091387638 hasAuthorship W3091387638A5054060684 @default.
- W3091387638 hasAuthorship W3091387638A5086550150 @default.
- W3091387638 hasConcept C101000010 @default.
- W3091387638 hasConcept C125235067 @default.
- W3091387638 hasConcept C136345775 @default.
- W3091387638 hasConcept C185592680 @default.
- W3091387638 hasConcept C35496372 @default.
- W3091387638 hasConcept C49799701 @default.
- W3091387638 hasConcept C55493867 @default.
- W3091387638 hasConcept C59822182 @default.
- W3091387638 hasConcept C86803240 @default.
- W3091387638 hasConceptScore W3091387638C101000010 @default.
- W3091387638 hasConceptScore W3091387638C125235067 @default.
- W3091387638 hasConceptScore W3091387638C136345775 @default.
- W3091387638 hasConceptScore W3091387638C185592680 @default.
- W3091387638 hasConceptScore W3091387638C35496372 @default.
- W3091387638 hasConceptScore W3091387638C49799701 @default.
- W3091387638 hasConceptScore W3091387638C55493867 @default.
- W3091387638 hasConceptScore W3091387638C59822182 @default.
- W3091387638 hasConceptScore W3091387638C86803240 @default.
- W3091387638 hasLocation W30913876381 @default.
- W3091387638 hasOpenAccess W3091387638 @default.
- W3091387638 hasPrimaryLocation W30913876381 @default.
- W3091387638 hasRelatedWork W190582151 @default.
- W3091387638 hasRelatedWork W19937763 @default.
- W3091387638 hasRelatedWork W226541234 @default.
- W3091387638 hasRelatedWork W36766032 @default.
- W3091387638 hasRelatedWork W37963417 @default.
- W3091387638 hasRelatedWork W4079787 @default.
- W3091387638 hasRelatedWork W55976832 @default.
- W3091387638 hasRelatedWork W64307507 @default.
- W3091387638 hasRelatedWork W99781215 @default.
- W3091387638 hasRelatedWork W133343358 @default.
- W3091387638 isParatext "false" @default.
- W3091387638 isRetracted "false" @default.
- W3091387638 magId "3091387638" @default.
- W3091387638 workType "article" @default.