Chilling stress suppresses plant reproduction through modulating BZR1 translation efficiency by CSP2.

Chilling stress is an important abiotic stress that affects plant growth and development. When it specifically occurs during the reproductive development stage of higher plants, it can significantly affect crop yield. Previous research on chilling stress has mostly focused on the seedling stage. Our findings show that brief chilling inhibits ovule initiation and reduces seed number per fruit. This decrease is related to BRASSINAZOLE RESISTANT 1 (BZR1), whose translation efficiency is affected by the RNA-binding protein COLD SHOCK PROTEIN 2 (CSP2). CSP2 binds to BZR1 mRNA and leads to the decreased abundance of BZR1 mRNA on the polysomes. Further research suggests that CSP2 may negatively regulate the translation efficiency of BZR1 by altering the N6-methyladenosine modification of BZR1 mRNA. Our results uncover a novel regulatory mechanism underlying the effect of chilling stress on plant reproduction and provide clues to help maintain crop yields of multi-ovulate ovaries.

• Publication year

  2025

• Venue

  Current Biology

• Publication date

  2025-12-01

• Fields of study

  Biology, Medicine, Environmental Science

• Identifiers
  DOI 10.1016/j.cub.2025.11.074PMID 41448184
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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