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A cross-scale analysis to understand and quantify the effects of photosynthetic enhancement on crop growth and yield across environments

journal contribution
posted on 2023-11-03, 02:46 authored by Alex Wu, Jason Brider, Florian A Busch, Min Chen, Karine Chenu, Victoria ClarkeVictoria Clarke, Brian Collins, Maria Ermakova, John R Evans, Graham D Farquhar, Britta Forster, Robert T Furbank, Michael Groszmann, Miguel A Hernandez-Prieto, Benedict M Long, Greg Mclean, Andries Potgieter, G Dean Price, Robert E Sharwood, Michael Stower, Erik van Oosterom, Susanne von Caemmerer, Spencer M Whitney, Graeme L Hammer
Photosynthetic manipulation provides new opportunities for enhancing crop yield. However, understanding and quantifying the importance of individual and multiple manipulations on the seasonal biomass growth and yield performance of target crops across variable production environments is limited. Using a state-of-the-art cross-scale model in the APSIM platform we predicted the impact of altering photosynthesis on the enzyme-limited (Ac ) and electron transport-limited (Aj ) rates, seasonal dynamics in canopy photosynthesis, biomass growth, and yield formation via large multiyear-by-location crop growth simulations. A broad list of promising strategies to improve photosynthesis for C3 wheat and C4 sorghum were simulated. In the top decile of seasonal outcomes, yield gains were predicted to be modest, ranging between 0% and 8%, depending on the manipulation and crop type. We report how photosynthetic enhancement can affect the timing and severity of water and nitrogen stress on the growing crop, resulting in nonintuitive seasonal crop dynamics and yield outcomes. We predicted that strategies enhancing Ac alone generate more consistent but smaller yield gains across all water and nitrogen environments, Aj enhancement alone generates larger gains but is undesirable in more marginal environments. Large increases in both Ac and Aj generate the highest gains across all environments. Yield outcomes of the tested manipulation strategies were predicted and compared for realistic Australian wheat and sorghum production. This study uniquely unpacks complex cross-scale interactions between photosynthesis and seasonal crop dynamics and improves understanding and quantification of the potential impact of photosynthesis traits (or lack of it) for crop improvement research.

History

Sub-type

  • Article

Publication title

PLANT CELL AND ENVIRONMENT

Medium

Print-Electronic

Volume

46

Issue

1

Pagination

23-44:22

eISSN

1365-3040

ISSN

0140-7791

Department/School

TIA - Research Institute

Publisher

WILEY

Publication status

  • Published

Place of publication

United States

Event Venue

ARC Centre of Excellence for Translational Photosynthesis, Centre for Crop Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Queensland, Australia.

Rights statement

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium,provided the original work is properly cited. Copyright 2022 The Authors.

UN Sustainable Development Goals

2 Zero Hunger