1.Lo mkhiqizo uyisitshalo endogenous auxin-inducing factor, esakhiwe 5 izinhlobo zezitshalo endogenous auxins kuhlanganise indoles kanye 2 izinhlobo zamavithamini. Yakhelwe ngokungezwa okungavamile, ingakhuphula umsebenzi we-endogenous auxin synthase ezitshalweni ngesikhathi esifushane futhi ibangele ukuhlanganiswa kwe-auxin engapheli kanye ne-gene expression, ikhuthaza ngokungaqondile ukuhlukana kwamaseli, ukunwetshwa nokwanda, ibangele ukwakheka kwama-rhizomes, futhi inenzuzo ukukhula okusha kwezimpande kanye nokwehlukaniswa kwesistimu ye-vascularization, kukhuthaza ukwakheka kwezimpande ezizayo zokusika.

I-IndoLE-3-BUTYRIC ACID POTASSIUM SALT (IBA-K) isilawuli sokukhula kwezitshalo esikhuthaza ukuhluma kwezitshalo. Isetshenziselwa ikakhulukazi ukukhuthaza ukukhula kwezimpande ze-capillary zezitshalo. Uma ihlanganiswa ne-Naphthalene acetic acid (NAA), ingenziwa ibe yimikhiqizo yezimpande. I-Indole-3-BUTYRIC ACID POTASSIUM SALT (IBA-K) ingasetshenziselwa ukusika izimpande zezithombo, kanye nokwengeza ukuvundisa okuguquguqukayo, umanyolo wokunisela nge-drip neminye imikhiqizo ukukhuthaza ukuhluma kwezitshalo nokwenza ngcono izinga lokusinda lokusikwa.

Ama-agent amane okulawula ukukhula, i-Paclobutrazol, i-Uniconazole, i-Chlormequat Chloride, ne-Mepiquat chloride, zonke zilawula ukukhula kwezitshalo ngesikhathi esifushane ngokuvimbela ukuhlanganiswa kwe-Gibberellic acid ezitshalweni. I

I-Paclobutrazole (Paclo) isetshenziswa ezitshalweni ezihlukahlukene ezifana nerayisi, ukolweni, imifino, nezihlahla zezithelo. I-Paclobutrazole (i-Paclo) ivimbela ukukhula kwezitshalo ezibanzi. Ingavimbela ukuhlanganiswa kwama-gibberellins angapheli ezitshalweni futhi inciphise ukuhlukana nokwelulwa kwamaseli ezitshalo.