A regulatory module tunes OsYABBY4 expression to modify vascular bundle development and tillering in rice.

Summary: Have you ever wondered how rice plants grow to produce lots of grains? It turns out, the way a rice plant's "veins" (called vascular bundles) are arranged is super important for its shape and how much food it makes. Scientists studied the DNA of rice and found a special gene called OsYABBY4. They discovered that tiny changes in the DNA near this gene act like volume knobs, turning the gene's activity up or down. This controls how many veins and branches the rice plant grows. By tweaking these genetic knobs, scientists hope to design better rice plants that can produce more food to feed the world!