Botanists used virus-induced gene silencing and gene expression experiments to understand the function of brassinosteroid-related transcription factors in Aquilegia coerulea petal spurs.
You can read the post at https://www.botany.one/2021/11/brassinosteroids-regulate-petal-spur-length-in-aquilegia/
You can read the original article at https://doi.org/10.1093/aob/mcab116