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DELLA proteins orchestrate arbuscule accomodation
1Max Planck Institute of Molecular Plant Physiology, 14476, Potsdam, Germany.
Current Opinion in Plant Biology
|August 3, 2026
Summary
Arbuscular mycorrhiza (AM) symbiosis in legumes and rice relies on the GRAS transcription factor DELLA. DELLA regulates key stages of AM development and integrates various signaling pathways for successful plant-microbe interaction.
Area of Science:
- Plant-microbe interactions
- Symbiotic signaling pathways
- Molecular plant science
Background:
- Arbuscular mycorrhiza (AM) is crucial for plant nutrient uptake, especially under starvation.
- The GRAS transcription factor DELLA is essential for AM symbiosis in legumes and rice.
- DELLA is a known target of gibberellin (GA) signaling.
Purpose of the Study:
- To review recent advances in DELLA-mediated regulation of AM development.
- To provide insights into how DELLA integrates hormonal and environmental signals in AM symbiosis.
Main Methods:
- Literature review of recent research on DELLA function in AM symbiosis.
- Analysis of molecular mechanisms underlying DELLA's role in plant-microbe interactions.
Main Results:
- DELLA controls critical AM development stages: root cortex patterning, arbuscule initiation, and degeneration.
- DELLA regulates downstream genes essential for AM development.
- DELLA acts as a regulatory hub integrating hormonal signals, environmental stimuli, and symbiosis formation.
Conclusions:
- DELLA is a central regulator orchestrating multiple signaling pathways in AM symbiosis.
- Understanding DELLA's role is key to improving plant nutrient acquisition through AM symbiosis.
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