Indole-3-acetic acid (IAA), the most abundant auxin, is a growth promoter hormone involved in several developmental processes. Auxin homeostasis is very important to its function and this is achieved through the regulation of IAA biosynthesis, conjugation, degradation and transport. | Nội dung Text Regulation of polar auxin transport in grapevine fruitlets Vitis vinifera L. and the proposed role of auxin homeostasis during fruit abscission