Aug 2026· Current opinion in plant biology· Vol 93, pp.
102936
· 0 citations· 68 references
Medicine
TL;DR
Recent advances in understanding of DELLA-mediated regulation of AM development are highlighted and state-of-the-art insights into how DELLA orchestrates these signaling pathways are provided.
Abstract
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.
Arbuscular mycorrhizal (AM) symbiosis is a widespread mutualism between plant roots and Glomeromycotina fungi that enables nutrient exchange through arbuscules. Although many transcriptional regulators of AM symbiosis have been identified, the role of the INDETERMINATE DOMAIN (IDD) proteins remain unknown. We show that...
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