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Author Shi Z., Cao J., Li C., Liu J., Yang X., Cheng X.
Title Genome-Wide Analysis of the Rice PcG Gene Family and Its Involvement in Salt Response and Development.
Abstract:
Polycomb group (PcG) proteins are pivotal in maintaining gene silencing through epigenetic mechanisms, particularly by catalyzing Histone H3 lysine 27 trimethylation (H3K27me3) via the Polycomb Repressive Complex 2 (PRC2) complex. These modifications are crucial for regulating developmental pathways and environmental stress responses in plants. Despite their importance, the PcG gene family has not been systematically explored in rice (<i>Oryza sativa</i>). In this study, 15 <i>OsPcG</i> genes were identified in the Nipponbare genome, spanning 12 chromosomes and classified into distinct phylogenetic groups. Structural and conserved motif analyses revealed high sequence conservation, while collinearity and Ka/Ks analyses indicated gene family expansion through segmental duplication under purifying selection. Promoter element prediction suggested that many <i>OsPcG</i> genes are responsive to plant hormones and abiotic stress cues. Transcriptome analysis under salt treatment highlighted <i>OsPcG5</i> as a key salt-responsive gene, with qRT-PCR confirming its dynamic expression. Subcellular localization showed <i>OsPcG5</i> residing in both the nucleus and plasma membrane, suggesting multifunctional roles. Additionally, overexpression of <i>OsFIE2</i>-a PRC2 component-resulted in elevated H3K27me3 levels and abnormal plant height, linking it to chromatin modification and development. These findings contribute to our understanding of <i>PcG</i> gene functions in rice and offer potential genetic resources for enhancing salt tolerance through epigenetic approaches.
Journal Plants (Basel)
Country China
Volume 14(17)
Pages
Year 2025
PubMed ID 40941970
PubMed Central ID 12431386
DOI 10.3390/plants14172805
URL -
Relation
Gene AIR1 CLF EMF2A EMF2B FIE1 FIE2 FVE LHP1 MSI1 RING171 RING240 RING364 SET1 SET11 WD40-173
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
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Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase