講演詳細

立地部門[Forest Environment]

日付	2024年3月10日
開始時刻	ポスター発表
会場名	532
講演番号	PI-32
発表題目	Sources of carbon supporting the fast growth of developing Phyllostachys edulis culms Sources of carbon supporting the fast growth of developing Phyllostachys edulis culms
所属	京都大学
要旨本文	Phyllostachys edulis is a fast-growing species that completes its height growth within 60 days after the shoot emerges without producing leaves. This phase was considered heterotrophic, with the carbon necessary for the growth being transferred from the mature culms via the rhizomes, although previous studies observed key enzymes and anatomical features related to C4-carbon fixation in immature developing culms. We tested whether C4-photosynthesis or dark-CO2 fixation through anaplerotic reactions significantly contributes to the fast-growing period, resulting in differences in the natural abundance of δ13C in bulk organic matter and organic compounds. Further, pulse-13CO2-labelling was performed on developing culms, either from the surface or from the internal hollow, to ascertain whether significant CO2 fixation occurs in developing culms. Results indicated the main carbon source was not assimilated by the developing culm.
著者氏名	○Shitephen Wang1 ・ Daniel Epron1 ・ Keito Kobayashi2 ・ Satoru Takanashi2 ・ Masako Dannoura1
著者所属	1Graduate School of Agriculture, Kyoto University ・ 2Kansai Research Centre, Forestry and Forest Products Research Institute
キーワード	Anaplerotic pathway, carbon isotope fractionation, δ13C of carbon compounds, Phyllostachys edulis, pulse 13CO2 labelling
Key word	Anaplerotic pathway, carbon isotope fractionation, δ13C of carbon compounds, Phyllostachys edulis, pulse 13CO2 labelling