Bridging pathways: SBP15 regulates GOBLET in modulating tomato axillary bud outgrowth

Axillary buds (ABs) are dormant buds located in the leaf axils of plants, which have the potential to develop into branches or flowers under appropriate conditions. At the molecular-genetic level, the miR156/SPL/SPB module regulates the development of ABs in plants, thus influencing plant architecture. Auxins are plant hormones that regulate various aspects of plant growth and development, including AB activity. Barrera-Rojas et al. (2023) show that suppressing AB outgrowth elevates auxin levels and lowers GOBLET expression, probably by suppressing its transcription by SBP15. Their findings provide insights into the regulation of AB outgrowth and tomato shoot architecture.