heteroauxin
/ˌhɛtəroʊˈɔːksɪn/
noun
- A plant hormone that promotes growth, especially root development; also known as indole-3-acetic acid (IAA).
- The plant's natural heteroauxin levels increase when it is exposed to certain types of light.
- Scientists studied how heteroauxin affects cell elongation in young seedlings.
- Gardeners sometimes use heteroauxin to help cuttings develop roots more quickly.