Partitioning of respired CO2 in newly sprouted Moso bamboo culms

2023-04-20 | journal article. A publication with affiliation to the University of Göttingen.

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​Partitioning of respired CO2 in newly sprouted Moso bamboo culms​
Ye, C.; Zeng, Q.; Hu, K.; Fang, D.; Hölscher, D.; Du, H. & Shi, Y. et al.​ (2023) 
Frontiers in Plant Science14.​ DOI: https://doi.org/10.3389/fpls.2023.1154232 

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Authors
Ye, Chongyu; Zeng, Qiangfa; Hu, Keda; Fang, Dongming; Hölscher, Dirk; Du, Huaqiang; Shi, Yongjun; Zhou, Yufeng; Berninger, Frank; Mei, Tingting; Zhou, Guomo
Abstract
Stem respiration (R s) plays a vital role in ecosystem carbon cycling. However, the measured efflux on the stem surface (E s) is not always in situ R s but only part of it. A previously proposed mass balance framework (MBF) attempted to explore the multiple partitioning pathways of R s, including sap-flow-transported and internal storage of R s, in addition to E s. This study proposed stem photosynthesis as an additional partitioning pathway to the MBF. Correspondingly, a double-chamber apparatus was designed and applied on newly sprouted Moso bamboo (Phyllostachys edulis) in leafless and leaved stages. R s of newly sprouted bamboo were twice as high in the leafless stage (7.41 ± 2.66 μmol m−2 s−1) than in the leaved stage (3.47 ± 2.43 μmol m−2 s−1). E s accounted for ~80% of R s, while sap flow may take away ~2% of R s in both leafless and leaved stages. Culm photosynthesis accounted for ~9% and 13% of R s, respectively. Carbon sequestration from culm photosynthesis accounted for approximately 2% of the aboveground bamboo biomass in the leafless stage. High culm photosynthesis but low sap flow during the leafless stage and vice versa during the leaved stage make bamboo an outstanding choice for exploring the MBF.
Issue Date
20-April-2023
Journal
Frontiers in Plant Science 
Organization
Fakultät für Forstwissenschaften und Waldökologie ; Burckhardt-Institut ; Abteilung Waldbau und Waldökologie der Tropen 
eISSN
1664-462X
Language
English

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