ʻO ke ʻano hana o kaIAA (Indole-3-Acetic Acid) ʻo ia ka hoʻoikaika ʻana i ka mahele cell, elongation a me ka hoʻonui.

ʻO ka haʻahaʻa haʻahaʻa a me ka Gibberellic acid a me nā pesticides ʻē aʻe synergistically paipai i ka ulu a me ka ulu ʻana o nā mea kanu.Hoʻoulu ka manaʻo kiʻekiʻe i ka hana ʻana o ka ethylene endogenous a hāpai i ka oʻo ʻana a me ka senescence o nā ʻiʻo a i ʻole nā ​​​​mea kanu.

ʻO ia ka mea hoʻomaka mua loa i hoʻohana ʻia i ka mahiʻai a me kahi mea hoʻoponopono ulu ulu lāʻau ākea ākea.Akā hiki ke hoʻohaʻahaʻa ʻia i loko a i waho o ka mea kanu.

Nā hana physiological kumu oIBA (Indole-3-Butyric Acid)ua like ia me IAA (Indole-3-Acetic Acid).Ma hope o ka hoʻopili ʻia ʻana e nā mea kanu, ʻaʻole maʻalahi ke alakaʻi ʻana i ke kino, a noho pinepine i ka ʻāpana lapaʻau, no laila hoʻohana nui ʻia e hoʻolaha i ke aʻa ʻana o nā ʻokiʻoki.ʻOiai ʻoi aku ka paʻa ma mua o ka indole acetic acid, maʻalahi ka decompose ke ʻike ʻia i ka mālamalama.

ʻO ka hoʻohana hoʻokahi ka hopena o ke aʻa i nā ʻano mea kanu, akā hui pū ʻia me nā mea hoʻoponopono ulu ulu me ka hopena rooting, ʻoi aku ka maikaʻi o ka hopena.ʻo kahi laʻana,IAA or IBAhoʻohana ʻia no ka hoʻoikaika ʻana i nā aʻa maikaʻi, liʻiliʻi a lālā i ka wā e ʻoki ai nā aʻa;NAA (Naphthylacetic Acid)hiki ke hoʻoulu i nā aʻa mānoanoa, endoplasmic multi-branched, etc., no laila hoʻohana pinepine ʻia kā lākou hui ʻana i ka hana.