Taw qhia thiab kev ua haujlwm ntawm tsob nroj auxin
Auxin yog indole-3-acetic acid, nrog rau cov mis mos molecular C10H9NO2. Nws yog cov tshuaj hormones ntxov tshaj plaws uas pom los txhawb kev loj hlob ntawm cov nroj tsuag. Lo lus Askiv los ntawm Greek lo lus auxein (kom loj hlob).
Cov khoom ntshiab ntawm indole-3-acetic acid yog dawb siv lead ua thiab yog insoluble hauv dej. Yooj yim soluble hauv cov kuab tshuaj organic xws li ethanol thiab ether. Nws yog yooj yim oxidized thiab hloov mus rau hauv Rose liab nyob rau hauv lub teeb, thiab nws physiological kev ua ub no kuj txo. Indole-3-acetic acid nyob rau hauv cov nroj tsuag tej zaum yuav nyob rau hauv ib tug dawb lub xeev los yog nyob rau hauv ib tug khi (bound) xeev. Cov tom kawg yog feem ntau ester lossis peptide complexes.
Cov ntsiab lus ntawm dawb indole-3-acetic acid nyob rau hauv cov nroj tsuag yog tsawg heev, txog 1-100 micrograms ib kilogram ntawm tshiab hnyav. Nws txawv nyob ntawm qhov chaw thiab hom ntaub so ntswg. Cov ntsiab lus nyob rau hauv cov ntaub so ntswg loj hlob los yog lub cev xws li cov ntsiab lus loj hlob thiab paj ntoos yog qhov tsawg.
Ntau cov nroj tsuag auxins kuj ua lub luag haujlwm hauv kev faib tawm ntawm tes thiab kev sib txawv, kev loj hlob txiv hmab txiv ntoo, tsim hauv paus thaum noj cuttings thiab defoliation. Qhov tseem ceeb tshaj plaws tshwm sim auxin yog β-indole-3-acetic acid. Artificially synthesized cog kev loj hlob regulators nrog cov teebmeem zoo xws li brassinolide, cytokinin, gibberellin, Naphthalene acetic acid (NAA), DA-6, thiab lwm yam.
Lub luag haujlwm ntawm Auxin yog dual: nws tuaj yeem txhawb kev loj hlob thiab inhibit kev loj hlob;
nws muaj peev xwm ob leeg leeb thiab inhibit germination; nws tuaj yeem tiv thaiv paj thiab txiv hmab txiv ntoo poob thiab nyias paj thiab txiv hmab txiv ntoo. Qhov no muaj feem xyuam rau qhov rhiab heev ntawm Auxin concentration rau ntau qhov chaw ntawm cov nroj tsuag. Feem ntau hais lus, cov hauv paus hniav yog qhov nkag siab ntau dua li buds tshaj li stems. Dicotyledons yog rhiab tshaj li monocots. Yog li, auxin analogs xws li 2-4D tuaj yeem siv los ua tshuaj tua kab mob. Nws yog tus cwj pwm los ntawm nws qhov xwm txheej ob sab, uas tuaj yeem txhawb kev loj hlob, inhibit kev loj hlob, thiab txawm tua cov nroj tsuag.
Cov nyhuv stimulating ntawm Auxin yog tshwj xeeb tshwm sim nyob rau hauv ob yam: txhawb thiab inhibition:
Auxin muaj kev txhawb nqa:
1. Tsim cov poj niam paj
2. Parthenocarpy, kev loj hlob ntawm zes qe menyuam phab ntsa
3. Kev sib txawv ntawm cov kab mob vascular
4. Expansion ntawm nplooj, tsim ntawm lateral keeb kwm
5. Kev loj hlob ntawm cov noob thiab txiv hmab txiv ntoo, kho qhov txhab
6. Apical dominance, thiab lwm yam.
Auxin muaj cov teebmeem inhibitory:
1. Paj abscission,
2. Txiv hmab txiv ntoo abscission, hluas nplooj abscission, sab ceg loj hlob,
3. Lub hauv paus tsim, thiab lwm yam.
Cov nyhuv ntawm auxin rau cov nroj tsuag loj hlob nyob ntawm qhov concentration ntawm auxin, hom nroj tsuag, thiab cov nroj tsuag. muaj feem xyuam rau lub cev (hauv paus, stems, buds, thiab lwm yam). Feem ntau hais lus, qhov tsis tshua muaj siab tuaj yeem txhawb kev loj hlob, thaum cov concentrations siab tuaj yeem cuam tshuam kev loj hlob lossis tseem ua rau cov nroj tsuag tuag. Cov nroj tsuag dicotyledonous yog rhiab heev rau Auxin dua li cov nroj tsuag monocotyledonous; cov kab mob vegetative yog rhiab ntau dua li cov kab mob hauv plab; cov hauv paus hniav yog rhiab tshaj li buds, thiab buds yog rhiab tshaj li stems, thiab lwm yam.
Cov khoom ntshiab ntawm indole-3-acetic acid yog dawb siv lead ua thiab yog insoluble hauv dej. Yooj yim soluble hauv cov kuab tshuaj organic xws li ethanol thiab ether. Nws yog yooj yim oxidized thiab hloov mus rau hauv Rose liab nyob rau hauv lub teeb, thiab nws physiological kev ua ub no kuj txo. Indole-3-acetic acid nyob rau hauv cov nroj tsuag tej zaum yuav nyob rau hauv ib tug dawb lub xeev los yog nyob rau hauv ib tug khi (bound) xeev. Cov tom kawg yog feem ntau ester lossis peptide complexes.
Cov ntsiab lus ntawm dawb indole-3-acetic acid nyob rau hauv cov nroj tsuag yog tsawg heev, txog 1-100 micrograms ib kilogram ntawm tshiab hnyav. Nws txawv nyob ntawm qhov chaw thiab hom ntaub so ntswg. Cov ntsiab lus nyob rau hauv cov ntaub so ntswg loj hlob los yog lub cev xws li cov ntsiab lus loj hlob thiab paj ntoos yog qhov tsawg.
Ntau cov nroj tsuag auxins kuj ua lub luag haujlwm hauv kev faib tawm ntawm tes thiab kev sib txawv, kev loj hlob txiv hmab txiv ntoo, tsim hauv paus thaum noj cuttings thiab defoliation. Qhov tseem ceeb tshaj plaws tshwm sim auxin yog β-indole-3-acetic acid. Artificially synthesized cog kev loj hlob regulators nrog cov teebmeem zoo xws li brassinolide, cytokinin, gibberellin, Naphthalene acetic acid (NAA), DA-6, thiab lwm yam.
Lub luag haujlwm ntawm Auxin yog dual: nws tuaj yeem txhawb kev loj hlob thiab inhibit kev loj hlob;
nws muaj peev xwm ob leeg leeb thiab inhibit germination; nws tuaj yeem tiv thaiv paj thiab txiv hmab txiv ntoo poob thiab nyias paj thiab txiv hmab txiv ntoo. Qhov no muaj feem xyuam rau qhov rhiab heev ntawm Auxin concentration rau ntau qhov chaw ntawm cov nroj tsuag. Feem ntau hais lus, cov hauv paus hniav yog qhov nkag siab ntau dua li buds tshaj li stems. Dicotyledons yog rhiab tshaj li monocots. Yog li, auxin analogs xws li 2-4D tuaj yeem siv los ua tshuaj tua kab mob. Nws yog tus cwj pwm los ntawm nws qhov xwm txheej ob sab, uas tuaj yeem txhawb kev loj hlob, inhibit kev loj hlob, thiab txawm tua cov nroj tsuag.
Cov nyhuv stimulating ntawm Auxin yog tshwj xeeb tshwm sim nyob rau hauv ob yam: txhawb thiab inhibition:
Auxin muaj kev txhawb nqa:
1. Tsim cov poj niam paj
2. Parthenocarpy, kev loj hlob ntawm zes qe menyuam phab ntsa
3. Kev sib txawv ntawm cov kab mob vascular
4. Expansion ntawm nplooj, tsim ntawm lateral keeb kwm
5. Kev loj hlob ntawm cov noob thiab txiv hmab txiv ntoo, kho qhov txhab
6. Apical dominance, thiab lwm yam.
Auxin muaj cov teebmeem inhibitory:
1. Paj abscission,
2. Txiv hmab txiv ntoo abscission, hluas nplooj abscission, sab ceg loj hlob,
3. Lub hauv paus tsim, thiab lwm yam.
Cov nyhuv ntawm auxin rau cov nroj tsuag loj hlob nyob ntawm qhov concentration ntawm auxin, hom nroj tsuag, thiab cov nroj tsuag. muaj feem xyuam rau lub cev (hauv paus, stems, buds, thiab lwm yam). Feem ntau hais lus, qhov tsis tshua muaj siab tuaj yeem txhawb kev loj hlob, thaum cov concentrations siab tuaj yeem cuam tshuam kev loj hlob lossis tseem ua rau cov nroj tsuag tuag. Cov nroj tsuag dicotyledonous yog rhiab heev rau Auxin dua li cov nroj tsuag monocotyledonous; cov kab mob vegetative yog rhiab ntau dua li cov kab mob hauv plab; cov hauv paus hniav yog rhiab tshaj li buds, thiab buds yog rhiab tshaj li stems, thiab lwm yam.
