Auxin bụ indole-3-acetic acid, nke nwere usoro molekul C10H9NO2. Ọ bụ hormone mbụ achọpụtara iji kwalite uto osisi. Okwu bekee sitere na okwu Grik auxein (to too). Ngwaahịa dị ọcha nke indole-3-acetic acid bụ kristal na-acha ọcha ma bụrụ nke a na-esighị ike na mmiri. Na-agbaze ngwa ngwa na ihe mgbaze organic dị ka ethanol na ether. Ọ na-adị mfe oxidized wee ghọọ rose red n'okpuru ìhè, na physiological ọrụ na-ebelata. Indole-3-acetic acid dị n'ime osisi nwere ike ịnọ na steeti efu ma ọ bụ na steeti ejiri (jide).

Ọdịiche dị na ọrụ: 24-epibrassinolide na-arụ ọrụ 97%, ebe 28-homobrassinolide na-arụ ọrụ 87%. Nke a na-egosi na 24-epibrassinolide nwere ọrụ dị elu n'etiti brassinolides na-emepụta kemịkal.

Prohexadione calcium bụ onye na-ahụ maka ihe ọkụkụ na-arụsi ọrụ ike nke ukwuu nke enwere ike iji chịkwaa uto na mmepe nke ọtụtụ ihe ọkụkụ ma na-ejikarị eme ihe na mmepụta ugbo.

Kedu ka Brassinolide si arụ ọrụ

Brassinolide bụ onye na-ahụ maka uto ihe ọkụkụ nke na-akwalite uto osisi na ifuru na ịmị mkpụrụ. Ụkpụrụ nke ime ihe bụ: Brassinolide nwere ike ịkpalite nkewa mkpụrụ ndụ osisi na elongation, mee ka ọdịiche dị na cell dịkwuo elu na uto anụ ahụ.