Metabolomics of related C3 and C4 Flaveria species indicate differences in the operation of photorespiration under fluctuating light
Year: 2024
Type: article
Abstract: C3 photosynthesis can be complemented with a C4 carbon concentrating mechanism (CCM) to minimize photorespiratory losses. C4 photosynthesis is often more efficient than C3 under steady‐state conditions. However, the C4 CCM depends on inter‐cellular metabolite concentration gradients, which must increase following increases in light intensity and could decrease rates of C4 photosynthesis under fluctuating light. Additionally, incomplete flux through photorespiration could prove beneficial to C4 assimilation during light induction of the CCM. Here, we compare metabolic profiles in the closely related C3 Flaveria robusta and C4 Flaveria bidentis during a light transient from low to high light to determine if these non‐steady state accumulation patterns provide insight to the induction of the metabolite gradients needed to drive C4 intermediate transport and if there is incomplete cycling of photorespiratory intermediates. In these C3 and C4 species, metabolite steady‐state pool sizes suggest that C4 transport acids maintain concentration gradients across the bundle sheath and mesophyll cell types under these light fluctuations. However, there was incomplete flux through photorespiration in the C4 F. bidentis, which could reduce photorespiratory CO2 loss via glycine decarboxylation and help maintain higher rates of assimilation during following induction periods.
Source: Plant Direct
DOI: 10.1002/pld3.70012
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: gold
Estimated APC paid: $2,580
Funders: U.S. Department of Energy, Alexander von Humboldt-Stiftung, Michigan State University, European Commission, Deutsche Forschungsgemeinschaft, Office of Science, College of Engineering, Michigan State University, Horizon 2020 Framework Programme, Great Lakes Bioenergy Research Center, Basic Energy Sciences, Biological and Environmental Research
Awards: G1205207005, G1414450211, G1648283888, G1920826717, G222768804, G2409105050, INTERDISCIPLINARY RESEARCH AND RELATED TRAINING PROGRAM IN THE PLANT SCIENCES, G2642650165, G2958780423, INTERDISCIPLINARY RESEARCH PROGRAM IN THE FUNDAMENTAL PLANT SCIENCES, GREAT LAKES BIOENERGY RESEARCH CENTER, G4123512917, G4178752329, G4427557669, G455569901, G4937468798, G5648016710, G5983990188, G6247714093, Rewiring photorespiration using natural and synthetic pathways to sustainably increase crop yield, EXC 2048: CEPLAS Exzellenzcluster für Pflanzenwissenschaften, G7350903426, G7437446154, G7735813670, INTERDISCIPLINARY RESEARCH AND RELATED TRAINING PROGRAM IN THE PLANT SCIENCES, GREAT LAKES BIOENERGY RESEARCH CENTER, G8850349022, INTERDISCIPLINARY RESEARCGH PROGRAM IN THE FUNDAMENTAL PLANT SCIENCES
OpenAlex ID: W4403387063