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Climate-smart crops with enhanced photosynthesis.

Christer Jansson1, John Vogel2, Samuel Hazen3

  • 1Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA.

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Enhancing photosynthesis through flexible C3-C4 metabolism and improved carbon utilization in model grasses can boost crop yields sustainably. This research aims to develop climate-smart crops for increased food and energy production while reducing emissions.

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Area of Science:

  • Plant Science
  • Crop Engineering
  • Sustainable Agriculture

Background:

  • Photosynthetic efficiency is crucial for increasing crop yields to meet global food and energy demands.
  • Current research primarily focuses on model plants like Arabidopsis thaliana and major crops, limiting rapid innovation.
  • There is a need for model systems closely related to crops that allow for faster design-build-test-learn cycles.

Purpose of the Study:

  • To advocate for expanded research into understanding, modeling, and engineering photosynthesis.
  • To propose novel research directions for enhancing carbon uptake, allocation, and utilization in plants.
  • To introduce climate-smart metabolic attributes for improved crop performance and environmental benefits.

Main Methods:

  • Focusing research on model grasses like Brachypodium distachyon (C3) and Setaria viridis (C4) to explore their full genomic potential.
  • Engineering pathways for flexible (facultative) C3-C4 metabolism adaptable to environmental conditions.
  • Developing strategies to increase rhizospheric sink strength for augmented carbon transport to soil, enhancing soil properties and carbon storage.

Main Results:

  • The proposed research directions aim to combine enhanced photosynthesis with climate-smart metabolic traits.
  • Exploring model grasses will allow for initial demonstration of ambitious undertakings in engineering photosynthesis.
  • This approach is expected to yield significant advancements in crop productivity and carbon sequestration.

Conclusions:

  • Developing climate-smart crops through enhanced photosynthesis and improved carbon utilization offers innovative solutions for global challenges.
  • Utilizing Brachypodium distachyon and Setaria viridis as model systems can accelerate progress in crop engineering.
  • This research holds the potential to increase crop productivity while simultaneously reducing atmospheric carbon and nitrogen emissions.