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Dual GATA Regulators for ABA Homoeostasis Mediated Bud Dormancy in Tree Peony
Ziwen Geng1, Chunyan He1, Fangting Qi1
1State Key Laboratory of Efficient Production of Forest Resources, National Engineering Research Center for Floriculture, Peony International Institute, School of Landscape Architecture, Beijing Forestry University, Beijing, China.
Plant, Cell & Environment
|January 29, 2026
Summary
Two GATA transcription factors, PlGATA1 and PlGATA6, act antagonistically to control bud dormancy in tree peonies. They fine-tune abscisic acid (ABA) levels, offering targets for improved off-season cultivation.
Area of Science:
- Plant molecular biology
- Plant physiology
- Transcriptional regulation
Background:
- Bud dormancy is a critical factor limiting tree peony growth and off-season cultivation.
- GATA transcription factors are known to regulate seed dormancy but their role in bud dormancy is not well understood.
Purpose of the Study:
- To investigate the role of GATA transcription factors in regulating bud dormancy in tree peonies.
- To identify specific GATA factors involved in the abscisic acid (ABA) signaling pathway controlling dormancy.
Main Methods:
- Characterization of the GATA gene family in tree peony.
- Analysis of PlGATA1 and PlGATA6 expression patterns in dormant and non-dormant buds.
- Heterologous expression in Arabidopsis and transient transformation assays in tree peony.
- In vivo and in vitro promoter binding assays.
Main Results:
- PlGATA1 and PlGATA6 showed antagonistic expression patterns, with PlGATA1 induced and PlGATA6 suppressed by ABA.
- PlGATA1 enhanced seed dormancy, while PlGATA6 suppressed it in Arabidopsis.
- Overexpression of PlGATA1 or silencing of PlGATA6 induced bud dormancy in tree peony.
- PlGATA1 activates the PlABI5 promoter, and PlGATA6 activates the PlCYP707A2-1 promoter.
Conclusions:
- PlGATA1 and PlGATA6 form an antagonistic module that regulates ABA homeostasis.
- This transcriptional module acts as a molecular switch controlling bud dormancy in tree peony.
- Findings provide insights into bud dormancy regulation and potential strategies for off-season cultivation.
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