DELLA proteins orchestrate arbuscule accomodation

Arbuscular mycorrhiza (AM) represents a key strategy for plants to overcome nutrient starvation. In legumes and rice, the development of this symbiosis requires the GRAS transcription factor DELLA, previously identified as central proteolytic target of gibberellin (GA) signaling. DELLA performs critical functions across multiple stages in AM development, including inner root cortex patterning, arbuscule initiation and degeneration, by regulating essential downstream genes driving these phenomena. Moreover, DELLA appears as a regulatory hub that integrates hormonal signals, environmental stimuli, and symbiosis formation. Here, we highlight recent advances in our understanding of DELLA-mediated regulation of AM development and provide state-of-the-art insights into how DELLA orchestrates these signaling pathways.