O loʻo i ai nei vaega e lima faʻamaonia o phytohormones, e pei o auxin, Gibberellic Acid GA3, Cytokinin, ethylene, ma le abscisic acid. Talu ai nei, brassinosteroids (BRs) ua faasolosolo malie ona aloaia o le ono vaega tele o phytohormones.

O lo'o maua Brassinolides i vaega o oloa e lima:

(1)24-trisepibbrassinolide: 72962-43-9 C28H48O6

(2)22,23,24-trisepibbrassinolide :78821-42-9

( 3)28-epihomobrassinolide: 80843-89-2 C29H50O6

(4)28-homobrassinolide:82373-95-3 C29H50O6

(5)Natural Brassinolide

1.O lenei oloa o se laau endogenous auxin-inducing factor, lea e aofia ai le 5 ituaiga o laau auxins endogenous e aofia ai indoles ma 2 ituaiga o vitamini. Faʻatulagaina faʻatasi ma le faʻaopoopoga o mea faʻapitoa, e mafai ona faʻateleina le gaioiga o le endogenous auxin synthase i totonu o laʻau i se taimi puupuu ma faʻaosofia le tuʻufaʻatasia o le auxin endogenous ma faʻamatalaga o le gene, faʻateleina le faʻalauteleina o le vaevaega, faʻalauteleina ma le faʻalauteleina, faʻaosofia le faʻavaeina o rhizomes, ma e aoga i tuputupu aʻe fou aʻa ma vascularization faiga eseesega, faʻamalosia le faʻavaeina o aʻa faʻalauiloa o tipi.

INDOLE-3-BUTYRIC ACID POTASSIUM SALT (IBA-K) ose faʻatonuga o le tuputupu aʻe o laʻau e faʻamalosia ai le aʻa o fua. E masani ona faʻaaogaina e faʻaleleia ai le tuputupu aʻe o aʻa capillary fua. A tu'ufa'atasia ma le Naphthalene acetic acid (NAA), e mafai ona fai ma mea e maua'a ai. INDOLE-3-BUTYRIC ACID POTASSIUM SALT (IBA-K) e mafai ona faʻaaogaina mo le tipiina o le aʻa o fatu, faʻapea foʻi ma le faʻaopopoina o le fugalaʻau faʻamaʻi, faʻafefeteina faʻafefe ma isi oloa e faʻaleleia ai le aʻafia o fualaʻau ma faʻaleleia le fua o le ola o tipi.