Auxin ndi indole-3-acetic acid, yokhala ndi formula ya maselo C10H9NO2. Ndilo timadzi tambiri tomwe tinapezeka tolimbikitsa kukula kwa mbewu. Mawu achingerezi amachokera ku mawu achi Greek auxein (kukula). Chopangidwa choyera cha indole-3-acetic acid ndi kristalo woyera ndipo sichisungunuka m'madzi. Amasungunuka mosavuta mu zosungunulira organic monga ethanol ndi ether. Imakhala ndi okosijeni mosavuta ndipo imasandulika kukhala ofiira owala, ndipo ntchito yake yokhudzana ndi thupi imachepetsedwa. Indole-3-acetic acid muzomera ikhoza kukhala yomasuka kapena yomangidwa (yomangidwa).

Kusiyana kwa ntchito: 24-epibrassinolide ndi 97% yogwira, pomwe 28-homobrassinolide ndi 87% yogwira. Izi zikuwonetsa kuti 24-epibrassinolide ili ndi ntchito yayikulu pakati pa ma brassinolides opangidwa ndi mankhwala.

Kashiamu ya Prohexadione ndiyomwe imayang'anira kukula kwa mbewu yomwe ingagwiritsidwe ntchito kuwongolera kukula ndi kukula kwa mbewu zambiri ndipo imagwiritsidwa ntchito nthawi zambiri popanga ulimi.

Momwe Brassinolide imagwirira ntchito

Brassinolide ndi kasamalidwe ka kukula kwa zomera zomwe zimalimbikitsa kukula kwa zomera ndi maluwa ndi fruiting. Mfundo yake ndi: Brassinolide imatha kulimbikitsa kugawanika kwa maselo a zomera ndi kutalika, kufulumizitsa kusiyana kwa maselo ndi kukula kwa minofu.