Contrasting leaf-scale photosynthetic low-light response and its temperature dependency are key to differences in crop-scale radiation use efficiency.

Autor: Wu A; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St. Lucia, Brisbane, Qld, 4072, Australia.; Australian Research Council Centre of Excellence for Plant Success in Nature and Agriculture, The University of Queensland, St. Lucia, Brisbane, Qld, 4072, Australia., Truong SH; Predictive Agriculture, Research & Development, Corteva Agriscience, Johnston, IA, 50131, USA., McCormick R; Predictive Agriculture, Research & Development, Corteva Agriscience, Johnston, IA, 50131, USA.; Gro Intelligence, New York, NY, 10022, USA., van Oosterom EJ; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St. Lucia, Brisbane, Qld, 4072, Australia.; Australian Research Council Centre of Excellence for Plant Success in Nature and Agriculture, The University of Queensland, St. Lucia, Brisbane, Qld, 4072, Australia., Messina CD; Predictive Agriculture, Research & Development, Corteva Agriscience, Johnston, IA, 50131, USA.; Horticultural Sciences Department, University of Florida, Gainesville, FL, 32611, USA., Cooper M; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St. Lucia, Brisbane, Qld, 4072, Australia.; Australian Research Council Centre of Excellence for Plant Success in Nature and Agriculture, The University of Queensland, St. Lucia, Brisbane, Qld, 4072, Australia., Hammer GL; Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St. Lucia, Brisbane, Qld, 4072, Australia.; Australian Research Council Centre of Excellence for Plant Success in Nature and Agriculture, The University of Queensland, St. Lucia, Brisbane, Qld, 4072, Australia.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2024 Mar; Vol. 241 (6), pp. 2435-2447. Date of Electronic Publication: 2024 Jan 12.
DOI: 10.1111/nph.19537
Abstrakt: Radiation use efficiency (RUE) is a key crop adaptation trait that quantifies the potential amount of aboveground biomass produced by the crop per unit of solar energy intercepted. But it is unclear why elite maize and grain sorghum hybrids differ in their RUE at the crop level. Here, we used a non-traditional top-down approach via canopy photosynthesis modelling to identify leaf-level photosynthetic traits that are key to differences in crop-level RUE. A novel photosynthetic response measurement was developed and coupled with use of a Bayesian model fitting procedure, incorporating a C 4 leaf photosynthesis model, to infer cohesive sets of photosynthetic parameters by simultaneously fitting responses to CO 2 , light, and temperature. Statistically significant differences between leaf photosynthetic parameters of elite maize and grain sorghum hybrids were found across a range of leaf temperatures, in particular for effects on the quantum yield of photosynthesis, but also for the maximum enzymatic activity of Rubisco and PEPc. Simulation of diurnal canopy photosynthesis predicted that the leaf-level photosynthetic low-light response and its temperature dependency are key drivers of the performance of crop-level RUE, generating testable hypotheses for further physiological analysis and bioengineering applications.
(© 2024 The Authors. New Phytologist © 2024 New Phytologist Foundation.)
Databáze: MEDLINE
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