Okwangoku kukho iindidi ezintlanu ezaziwayo ze-phytohormones, ezizezi, i-auxin, i-Gibberellic Acid GA3, i-Cytokinin, i-ethylene, kunye ne-abscisic acid. Kutshanje, i-brassinosteroids (BRs) ziye zaqatshelwa ngokuthe ngcembe njengodidi lwesithandathu olukhulu lwe-phytohormones.

I-Brassinolides ifumaneka kwiindidi ezintlanu zemveliso:

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

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

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

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

(5)I-Natural Brassinolide

I-1.Le mveliso isityalo endogenous auxin-inducing factor, equlethwe ziindidi ezi-5 zezityalo ze-endogenous auxins ezibandakanya i-indoles kunye ne-2 iintlobo zeevithamini. Iyilwe kunye nokongeza i-exogenous, inokunyusa umsebenzi we-auxin synthase engapheliyo kwizityalo ngexesha elifutshane kwaye ibangele ukuhlanganiswa kwe-auxin ye-endogenous kunye ne-gene expression, ikhuthaza ngokungathanga ngqo ukwahlukana kweeseli, ukwanda kunye nokwandiswa, ibangela ukubunjwa kwe-rhizomes, kwaye iluncedo ukukhula kweengcambu ezintsha kunye nokwahlulahlula kwenkqubo ye-vascularization, ikhuthaza ukubunjwa kweengcambu zokusika.

I-INDOLE-3-BUTYRIC ACID POTASSIUM SALT (IBA-K) ngumlawuli wokukhula kwezityalo okhuthaza ukuhluma kwezityalo. Isetyenziselwa ikakhulu ukukhuthaza ukukhula kweengcambu zecapillary zesityalo. Xa idibene ne-Naphthalene acetic acid (NAA), inokwenziwa kwiimveliso zengcambu. I-INDOLE-3-BUTYRIC ACID POTASSIUM SALT (IBA-K) ingasetyenziselwa ukusika iingcambu zezithole, kunye nokongeza isichumiso esigungxulwayo, isichumiso sokunkcenkceshela kunye nezinye iimveliso ukukhuthaza ukuhluma kwesityalo kunye nokuphucula izinga lokusinda lokusikwa.