I-S-Abscisic Acid (ABA) yihomoni yesityalo. I-S-Abscisic Acid sisilawuli sokukhula kwesityalo sendalo esinokukhuthaza ukukhula okuhambelanayo kwezityalo, ukuphucula umgangatho wokukhula kwezityalo, kunye nokukhuthaza ukuchithwa kwesityalo. Kwimveliso yezolimo, iAbscisic Acid isetyenziswa ikakhulu ukwenza ukuba isityalo sixhathise okanye siqhelane nobunzima, obufana nokuphucula ukuxhathisa kwesityalo kwimbalela, ukumelana nengqele, ukuxhathisa kwezifo, kunye nokumelana netyuwa-alkali.

I-4-Chlorophenoxyacetic acid (4-CPA) yi-phenolic plant growth regulator. I-4-Chlorophenoxyacetic acid (4-CPA) inokufunxwa ziingcambu, iziqu, amagqabi, iintyatyambo kunye neziqhamo zezityalo. Umsebenzi wayo webhayoloji uhlala ixesha elide. Iziphumo zayo ze-physiological zifana neehomoni ezingapheliyo, ezikhuthaza ukwahlukana kweeseli kunye nokwahlukana kwezicubu, ukuvuselela ukwanda kwe-ovary, ukukhuthaza i-parthenocarpy, ukwenza iziqhamo ezingenambewu, kunye nokukhuthaza ukusekwa kweziqhamo kunye nokwandiswa kweziqhamo.

I-14-Hydroxylated brassinolide, i-28-homobrassinolide, i-28-epihomobrassinolide, i-24-epibrassinolide, i-22, i-23, i-24-trisepibrassinolide

Njengomlawuli wokukhula kwezityalo, iBrassinolide ifumene ingqalelo ebanzi nothando oluvela kumafama. Kukho iintlobo ezi-5 ezahlukeneyo zeBrassinolide ezifumaneka rhoqo kwimarike, ezineempawu ezifanayo kodwa kunye nokwahluka. Ngenxa yokuba iintlobo ezahlukeneyo zeBrassinolide zineempembelelo ezahlukeneyo ekukhuleni kwezityalo. Eli nqaku liza kwazisa imeko ethile yezi ntlobo ze-5 ze-Brassinolide kwaye zigxininise ekuhlalutyeni ukungafani kwazo.