Auxin Plant hormone that regulates growth and plays a role in root initiation in Plumeria cuttings. Synonyms: Rooting HormoneRelated Articles: Glossary: Apical dominanceThe inhibition of lateral bud growth by auxin produced in a plant's terminal bud.Glossary: Auxin HormoneApplying auxin hormone can enhance Plumeria cuttings rooting.Glossary: Root HormoneApplying root hormone can aid in the rooting of plant cuttings.Glossary: Indole Acetic AcidRole of Indole Acetic Acid in root development of Plumeria cuttings.