Intshayelelo kunye nemisebenzi ye-Plant auxin

I-Auxin i-indole-3-acetic acid, kunye ne-molecular formula C10H9NO2. Yeyona hormone yokuqala efunyenweyo ukukhuthaza ukukhula kwezityalo. Igama lesiNgesi livela kwigama lesiGrike elithi auxein (ukukhula).
Imveliso ecocekileyo ye-indole-3-acetic acid i-crystal emhlophe kwaye ayinyibiliki emanzini. Inyibilika ngokulula kwizinyibilikisi eziphilayo ezifana ne-ethanol kunye ne-ether. I-oxidized ngokulula kwaye ijike ibe bomvu i-rose phantsi kokukhanya, kwaye umsebenzi wayo we-physiological nawo uyancipha. I-Indole-3-acetic acid kwizityalo ingaba kwindawo ekhululekile okanye kwindawo eboshiweyo (eboshwe). Ezi zamva zininzi zii-ester okanye ii-peptide complexes.

Umxholo we-indole-3-acetic acid yamahhala kwizityalo iphantsi kakhulu, malunga ne-1-100 micrograms ngekhilogram yobunzima obutsha. Iyahluka ngokuxhomekeke kwindawo kunye nohlobo lwethishu. Umxholo kwiithishu ezikhula ngamandla okanye izitho ezifana namanqaku akhulayo kunye ne-pollen ziphantsi.
Uninzi lweeAuxins zezityalo zidlala indima ekuhlukaneni kweeseli kunye nokwahlula, ukuphuhliswa kweziqhamo, ukubunjwa kweengcambu xa uthatha ukusika kunye nokuchithwa. Eyona ibalulekileyo i-auxin eyenzekayo ngokwendalo yi-β-indole-3-acetic acid. Izilawuli zokukhula kwezityalo ezenziwe ngobuchule ezineziphumo ezifanayo ziquka i-brassinolide, i-cytokinin, i-gibberellin, i-Naphthalene acetic acid (NAA), i-DA-6, njl.

Indima ye-Auxin ibini: inokukhuthaza ukukhula kunye nokuvimbela ukukhula;
inokukhawulezisa kwaye inqande ukuntshula; inokuthintela ukuwa kweentyatyambo kunye neziqhamo kunye neentyatyambo ezibhityileyo kunye neziqhamo. Oku kuhambelana novakalelo lweAuxin yoxinaniso kwiindawo ezahlukeneyo zesityalo. Ngokuqhelekileyo, iingcambu zesityalo zinovakalelo ngakumbi kunezikhondo kuneziqu. IiDicotyledons zinovakalelo ngakumbi kunemonocots. Ngoko ke, i-auxin analogs ezifana ne-2-4D ingasetyenziswa njenge-herbicides. Ibonakala ngendalo yamacala amabini, anokuthi akhuthaze ukukhula, athintele ukukhula, kwaye ade abulale izityalo.

Isiphumo esikhuthazayo se-Auxin sibonakaliswa ngokukodwa kwimiba emibini: ukukhuthaza kunye nokuthintela:
I-Auxin inefuthe lokukhuthaza:
1. Ukubunjwa kweentyatyambo zasetyhini
2. I-Parthenocarpy, ukukhula kodonga lwe-ovary
3. Ukwahlula kwee-vascular bundles
4. Ukwandiswa kwamagqabi, ukubunjwa kweengcambu ezisecaleni
5. Ukukhula kwembewu kunye neziqhamo, ukuphulukiswa kwamanxeba
6. Ulawulo lwe-apical, njl.

I-Auxin ineziphumo ezithintelayo:
1. Ukukrazula kweentyatyambo,
2. Ukukrazuka kweziqhamo, ukukrazuka kwamagqabi amatsha, ukukhula kwesebe elisecaleni,
3. Ukwakhiwa kweengcambu, njl.

Isiphumo se-auxin ekukhuleni kwesityalo sixhomekeke ekugxininiseni kwe-auxin, uhlobo lwesityalo, kunye nesityalo. ezinxulumene nezitho (iingcambu, iziqu, amagqabi, njl.). Ngokuqhelekileyo, ukugxila okuphantsi kunokukhuthaza ukukhula, ngelixa ukugxila okuphezulu kunokuthintela ukukhula okanye kubangele ukufa kwezityalo. Izityalo ze-Dicotyledonous zivakalelwa ngakumbi kwi-Auxin kunezityalo ze-monocotyledonous; amalungu ezityalo abuthathaka kunamalungu okuzala; iingcambu zinovakalelo ngakumbi kunamathupha, kwaye amagqabi abuthathaka ngakumbi kuneziqu, njl.