1.This ngwaahịa bụ osisi endogenous auxin-inducing ihe, nke mejupụtara 5 ụdị osisi endogenous auxins gụnyere indoles na 2 ụdị vitamin. Emebere ya na mgbakwunye exogenous, ọ nwere ike ịbawanye ọrụ nke auxin synthase endogenous na osisi n'ime obere oge wee mee ka njikọ nke auxin endogenous na okwu mkpụrụ ndụ pụta, na-akwalite nkewa sel, elongation na mgbasawanye, na-ebute nguzobe nke rhizomes, yana bara uru. ọhụrụ mgbọrọgwụ ibu na vascularization usoro iche, na-akwalite guzobe adventitious mgbọrọgwụ nke cuttings.

INDOLE-3-BUTYRIC ACID POTASSIUM SALT (IBA-K) bụ onye na-ahụ maka uto osisi na-akwalite mgbọrọgwụ ihe ọkụkụ. A na-ejikarị ya akwalite uto nke mgbọrọgwụ capillary akuku. Mgbe ejikọtara ya na Naphthalene acetic acid (NAA), enwere ike ịme ya ka ọ bụrụ ngwaahịa mgbọrọgwụ. Enwere ike iji INDOLE-3-BUTYRIC acid potassium nnu (IBA-K) na-egbutu mgbọrọgwụ nke mkpụrụ osisi, yana ịgbakwunye fatịlaịza mmiri, fatịlaịza ogbugba mmiri n'ubi na ngwaahịa ndị ọzọ iji kwalite mgbọrọgwụ ihe ọkụkụ ma melite ọnụego ndụ nke mkpụrụ osisi.

Ndị na-ahụ maka njikwa uto anọ, Paclobutrasol, Uniconazole, Chlormequat Chloride, na Mepiquat chloride, na-achịkwa uto osisi n'ime obere oge site na igbochi njikọ nke Gibberellic acid na osisi. I

A na-eji Paclobutrazole (Paclo) eme ihe n'ubi dị iche iche dịka osikapa, ọka wit, akwụkwọ nri, na osisi mkpụrụ osisi. Paclobutrazole (Paclo) bụ ihe dị iche iche na-egbochi uto osisi. Ọ nwere ike igbochi njikọ nke gibberellins endogenous na osisi ma belata nkewa na elongation nke mkpụrụ ndụ ihe ọkụkụ.