Strigolactones are carotenoid-derived plant hormones that were first discovered in root exudates as germination stimulants for weeds. They have two main functions: regulating shoot branching inhibition and promoting symbiotic interactions through root exudates. There are two proposed models for how strigolactones regulate shoot branching - the canalization model, where they repress accumulation of the auxin efflux carrier PIN1 in plasma membranes, making it harder for buds to connect to the main stem and branch out. The other is the direct action model, where strigolactones and cytokinins directly affect branching in buds by regulating the transcription factor BRANCHED1. There are still outstanding questions about