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The ZFP36/ZFP252-OsDOG1L1-OsPP2Cs module regulates seed germination in rice.

Chuyan Chen¹, Kunming Zhang¹, Jun Miao^1,2,3

¹Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Zhongshan Biological Breeding Laboratory, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Agricultural College of Yangzhou University, Yangzhou, 225009, China.

Journal of Integrative Plant Biology

|June 29, 2026

Summary

Rice seed dormancy and germination are controlled by the OsDOG1L1 gene. Transcription factors ZFP36 and ZFP252 regulate OsDOG1L1, which in turn affects ABA signaling and seed development.

Keywords:

C2H2 ZFP protein OsDOG1L1 clade‐A PP2C phosphatases rice seed germination

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Area of Science:

Plant Biology
Molecular Genetics
Agronomy

Background:

Seed germination is vital for plant growth, regulated by complex genetic networks.
Understanding rice seed germination mechanisms is crucial for agriculture.
The precise molecular regulation of rice seed germination remains unclear.

Purpose of the Study:

Identify key regulators of rice seed germination and dormancy.
Elucidate the molecular mechanisms controlling these processes.
Characterize the role of OsDOG1L1 and its interacting partners.

Main Methods:

Gene expression analysis (temporal analysis of OsDOG1L1).
Genetic analysis (overexpression and loss-of-function mutants).
Molecular analysis (protein-protein interactions, phosphatase activity assays).

Main Results:

OsDOG1L1 acts as a negative regulator of rice seed germination and a promoter of dormancy.
Overexpression of OsDOG1L1 delays germination; mutants show accelerated germination.
ZFP36 and ZFP252 transcription factors repress OsDOG1L1 expression.
OsDOG1L1 interacts with and suppresses OsPP2C09 and OsPP2C30, enhancing ABA signaling.

Conclusions:

A novel regulatory module (ZFP36/ZFP252-OsDOG1L1-OsPP2Cs) governs rice seed germination.
This module integrates ABA signaling to control germination and dormancy.
Findings provide insights into the molecular basis of germination control in rice.