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Related Experiment Video

Updated: Jun 26, 2026

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

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Published on: October 14, 2022

An OsGLK1/2-DGP1/2/3 feedback module regulates rice photosynthesis and yield.

Xueju Liu^1,2, Kangwei Liu^1,2, Shu Xu¹

¹Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou, China.

Science Advances

|June 24, 2026

Summary

Rice GOLDEN2-LIKE (GLK) proteins regulate photosynthesis and yield. A GLK-DGP feedback module controls chlorophyll and seed production, offering potential for crop breeding advancements.

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Area of Science:

Plant Biology
Molecular Genetics
Agricultural Science

Background:

GOLDEN2-LIKE (GLK) proteins are key regulators of plant photosynthesis.
Their precise molecular mechanisms, particularly in rice, remain incompletely understood.

Purpose of the Study:

To elucidate the molecular module centered on OsGLK proteins in regulating rice photosynthesis and yield.
To identify key genes and interactions within this regulatory network.

Main Methods:

Analysis of rice mutants (Osglk1 Osglk2 double mutants, Dgp1, Dgp2).
Transcriptome sequencing to identify OsGLK-regulated genes.
Molecular assays to confirm OsGLK binding to promoter regions of target genes.

Main Results:

OsGLK1 and OsGLK2 exhibit partially redundant roles in photosynthesis; double mutants are seedling lethal.
OsGLK proteins regulate genes involved in carbohydrate metabolism and photosynthesis.
DEEP GREEN PANICLE (DGP) proteins (DGP1, DGP2, DGP3) act as direct repressors of OsGLK activity.
Mutations in DGP1 and DGP2 significantly enhanced rice seed weight and yield.

Conclusions:

A feedback module involving OsGLK1/2 and DGP1/2/3 regulates rice photosynthesis and yield.
This module offers potential targets for improving rice crop breeding and productivity.