How Does Plant hormones: How IAA, the most common form of auxin Work?

Plant hormones are like tiny messengers that help plants grow and change. IAA, which is a kind of auxin, acts like a leader in this message-passing team.

Imagine your plant as a little army, and IAA is the captain who tells different parts of the army what to do. If the captain says “grow taller,” the tip of the stem gets that message and starts growing, just like how you might get taller when you play outside and have lots of fun!

IAA moves from one part of the plant to another, kind of like a letter being passed from hand to hand. When it reaches a leaf or a root, it tells that part what to do, maybe to grow more or to stop growing for a while.

If there’s more IAA on one side of a stem, that side grows faster than the other. This is why plants bend toward light, it's like they're saying, “Hey, the sunshine is over here; let’s move closer!”

IAA helps plants know when to grow, when to stop, and even when to make new leaves or roots, all without any magic, just clever messages!