I-Auxin iyi-indole-3-acetic acid, enefomula ye-molecular C10H9NO2. Yihomoni yokuqala eyatholwa ukukhuthaza ukukhula kwezitshalo. Igama lesiNgisi livela egameni lesiGreki elithi auxein (ukukhula). Umkhiqizo omsulwa we-indole-3-acetic acid iyikristalu emhlophe futhi ayincibiliki emanzini. Incibilika kalula kuzincibilikisi zemvelo njenge-ethanol ne-ether. I-oxidized kalula futhi iphenduka ibebomvu ebomvu ngaphansi kokukhanya, futhi umsebenzi wayo wokuphila nawo uyancipha. I-Indole-3-acetic acid ezitshalweni ingase ibe sesimweni esikhululekile noma esimweni esibophekile (esibophekile).

Umehluko emsebenzini: I-24-epibrassinolide isebenza ngama-97%, kuyilapho i-28-homobrassinolide isebenza ngama-87%. Lokhu kukhombisa ukuthi i-24-epibrassinolide inomsebenzi ophezulu phakathi kwama-brassinolides akhiwe ngamakhemikhali.

I-Prohexadione calcium iyisilawuli sokukhula kwezitshalo esisebenza kakhulu esingasetshenziswa ukulawula ukukhula nokuthuthukiswa kwezilimo eziningi futhi ivame ukusetshenziswa ekukhiqizweni kwezolimo.

Isebenza kanjani i-Brassinolide

I-Brassinolide isilawuli sokukhula kwezitshalo esikhuthaza ukukhula kwezitshalo nokuqhakaza kanye nokuthela. Umgomo wayo wesenzo uthi: I-Brassinolide ingashukumisa ukuhlukana kwamangqamuzana ezitshalo nokwandisa, isheshise ukuhlukaniswa kwamaseli kanye nokukhula kwezicubu.