DELLAs directed gibberellins responses orchestrate crop development: A brief review

Abstract Gibberellins (GAs) are a pervasive group of diterpene phytohormones. They can dominate various aspects of plant development and modulate plant phenotypic plasticity by crosstalking with multiple phytohormones. Studies on GA signaling illustrate that master negative regulator DELLA proteins regulate GAs and nearly all phytohormones’ growth responses to sustain plant growth and defense under relentless biotic and abiotic stresses. The molecular mechanism of DELLA proteins in regulating GA‐sensitive growth in an integrated manner with multiple phytohormones became apparent recently. These studies describe the interaction of interaction DELLA proteins with a diverse group of transcriptional regulators and factors as well as nontranscriptional proteins in directing GA‐stimulated plant growth. In this review, we address the extensive recent work to delineate DELLA proteins and their interacting partners and summarize the latest evidence that DELLA proteins have a unique function in suppressing the GA‐related responses to sustain the tension among growth and defense.