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Updated: Feb 20, 2026

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Rubisco dark inhibition in angiosperms shows a complex distribution pattern.

Connor Nehls-Ramos1, Elizabete Carmo-Silva1, Douglas J Orr1

  • 1Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK.

Journal of Experimental Botany
|February 19, 2026
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Summary
This summary is machine-generated.

Improving crop yields requires understanding Rubisco regulation. This study compiles data on Rubisco dark inhibition across flowering plants, revealing phylogenetic trends and knowledge gaps to enhance photosynthesis.

Keywords:
CA1PRubiscochloroplastdark inhibitionenzyme activityinhibitorsphotosynthesisphotosynthetic metabolismsugar-phosphates

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Area of Science:

  • Plant Physiology
  • Biochemistry
  • Evolutionary Biology

Background:

  • Photosynthesis efficiency is key to crop yield, with Rubisco regulation under fluctuating light being a major limitation.
  • Rubisco inhibitors, like 2-carboxy-d-arabinitol 1-phosphate, accumulate in low light/darkness, but their physiological role and species variability remain unclear.
  • Understanding Rubisco regulation is crucial for agricultural productivity.

Purpose of the Study:

  • To compile and analyze existing data on Rubisco dark inhibition in flowering plants.
  • To investigate phylogenetic trends in Rubisco inhibition.
  • To identify data gaps and biases in current research on Rubisco regulation.

Main Methods:

  • Compiled published data on Rubisco dark inhibition from 157 species across 14 orders.
  • Standardized and categorized inhibition levels.
  • Analyzed data in the context of phylogenetic information.

Main Results:

  • Created a novel resource for Rubisco dark inhibition across flowering plants.
  • Highlighted significant gaps and biases in the available data.
  • Identified clear phylogenetic trends in Rubisco inhibition, raising evolutionary questions.

Conclusions:

  • Enhanced understanding of Rubisco dark and low light inhibition in photosynthetic regulation.
  • Provides a foundation for future research aimed at improving crop photosynthesis.
  • Informs strategies for enhancing crop yields through optimized Rubisco function.