Qhov sib txawv tseem ceeb ntawm auxin gibberellin thiab cytokinin yog tias auxins nyiam qia elongation thaum gibberellins nyiam tua kev loj hlob thiab noob germination thiab cytokinins nyiam faib cell.
Cov tshuaj cog qoob loo lossis cov tshuaj hormones yog cov tshuaj tseem ceeb hauv cov nroj tsuag kev loj hlob, kev loj hlob, kev sib txawv, thiab kev ruaj ntseg ntawm cov nroj tsuag kev noj qab haus huv. Lawv yog secreted feem ntau los ntawm cov hauv paus hniav thiab ces taug kev raws cov nroj tsuag kom pab txoj kev loj hlob. Auxins, Gibberellins thiab Cytokinin yog cov pab pawg tseem ceeb ntawm cov tshuaj hormones cog. Lawv kuj tau tsim cov khoom siv dag zog thiab ntxiv los pab txhawb kev noj qab haus huv ntawm cov nroj tsuag thaum cog thiab nthuav tawm.
Auxin yog dab tsi?
Auxin yog ib pawg ntawm cov tshuaj hormones cog lossis cog kev loj hlob. Lub luag haujlwm tseem ceeb ntawm auxin hauv cov nroj tsuag yog tswj cov nroj tsuag kev loj hlob los ntawm kev txhawb nqa qia kev loj hlob. Auxins, yog li, nyiam cov cell proliferation thiab elongation ntawm stems nyob rau hauv ib tsob nroj. Lawv kuj ua lub luag haujlwm tseem ceeb hauv kev faib cov cell thiab kev sib txawv, kev loj hlob ntawm cov txiv hmab txiv ntoo thiab cov txheej txheem fruiting thiab nyob rau hauv cov txheej txheem nplooj poob. Auxins nyiam rooting los ntawm kev ua ntawm qhov chaw txiav ntawm cov hauv paus hniav, thiab. Tsis tas li ntawd, lawv ua raws li kev pom zoo ntawm apical dominance.
Daim duab 01: Auxin
Cov qauv ntawm auxin yog ib lub nplhaib lossis ob lub nplhaib uas tsis muaj zog uas muaj cov saw hlau sab. Beta-indolylacetic acid ntawm IAA yog qhov tshwm sim ntau tshaj plaws ntawm auxin pom hauv cov nroj tsuag. Nws yog tsim los ntawm cov amino acid tryptophan. IAA kuj tau tsim thaum lub sij hawm tawg ntawm glycosides. Auxins kuj tseem tuaj yeem tsim tawm thiab siv ntau zaus thaum cog qoob loo.
Gibberellin yog dab tsi?
Gibberellin, tseem hu ua gibberellic acid, yog ib hom kev cog qoob loo lossis cog cov tshuaj hormones pom nyob rau hauv cov noob, nplooj, thiab cov hauv paus hniav. Lawv feem ntau pom nyob rau hauv qis qis ntawm cov nroj tsuag thiab hauv qee cov fungi. Feem ntau, Gibberellin tau pom nyob rau hauv fungus, Giberella fujikuroi. Lub luag haujlwm tseem ceeb ntawm Gibberellin yog los txhawb kev loj hlob tua. Txawm li cas los xij, lawv kuj tseem koom nrog hauv bolting lossis elongation ntawm cov nroj tsuag tshwj xeeb thaum raug rau cov xwm txheej sib txawv ntawm lub cev. Tsis tas li ntawd, Gibberellins kuj koom nrog inducing noob germination, flowering txheej txheem, thiab qhia txog kev sib deev hom ntawm cov nroj tsuag. Nws nyiam qhov dormancy thiab txiv hmab txiv ntoo senescence hauv cov nroj tsuag ib yam nkaus.
Daim duab 02: Gibberellin
(1. Ib tsob nroj uas tsis muaj gibberellins, 2. Cov nroj tsuag nruab nrab ntawm cov gibberellins, 3. Ib tsob nroj uas muaj ntau cov gibberellins)
Structurally, Gibberellin yog tetracyclic gibbane qauv. Cov theem ntawm unsaturation ntawm cov qauv yog tsawg dua thiab nws tsis muaj ib sab saw. Gibberellin synthesis feem ntau yog ua los ntawm methylerythritol phosphate (MEP) txoj kev. Qhov pib compound ntawm kev sib txuas yog trans-geranylgeranyl diphosphate (GGDP). Kev kho Gibberellin yog ua tsis tu ncua thaum cog qoob loo kom tau cov txiv hmab txiv ntoo ntawm qhov ntau thiab tsawg. Qee qhov xwm txheej, kev kho Gibberellin ua rau cov txiv hmab txiv ntoo tsis muaj noob.
YCytokinin yog dab tsi?
Cytokinin yog cov tshuaj cog qoob loo feem ntau koom nrog hauv cov txheej txheem ntawm kev faib cell thiab kev sib txawv ntawm tes. Adenosine yog qhov chaw pib rau kev sib txuas ntawm cytokinin. Synthesis ntawm cytokinin nyob rau hauv cov nroj tsuag pib ntawm lub hauv paus. Tom qab ntawd lawv txav mus los ntawm xylem mus rau nplooj thiab txiv hmab txiv ntoo, txhawb txoj kev faib ntawm tes. Yog li ntawd, lawv yog qhov tseem ceeb los pab txhawb kev loj hlob ntawm cov nroj tsuag.
Daim duab 03: Cytokinin
Tsis tas li ntawd, cytokinin kuj tseem pab tiv thaiv kev laus nrog auxin. Lawv kuj koom nrog hauv stabilizing cov ntsiab lus protein ntawm cov nroj tsuag. Qhov no pab cov nroj tsuag kom noj qab haus huv thiab tiv thaiv yellowing ntawm nplooj. 6-furfurylaminopurine (kinetin) yog cytokinin dav siv hauv kev lag luam thaum khaws zaub.
Dab tsi yog qhov zoo sib xws ntawm Auxin Gibberellin thiab Cytokinin?
- Auxin, Gibberellin, thiab cytokinin yog cov tshuaj cog qoob loo lossis cov tshuaj hormones cog.
- Txhua tus nyiam kev loj hlob ib txwm nyob hauv cov nroj tsuag.
- Lawv yog tsim los ntawm cov nroj tsuag.
- Txawm li cas los xij, tag nrho peb cov tshuaj hormones tuaj yeem tsim tawm los siv rau hauv kev cog qoob loo thiab nthuav tawm.
- Lawv yog cov tshuaj uas pib tsim cov hauv paus hniav.
- Txhua peb yam kev loj hlob yog siv rau hauv kev cog qoob loo cog qoob loo, xws li kab lis kev cai ntawm cov ntaub so ntswg, sib txawv ua ke.
- Kev tshuaj ntsuam genetic recombination tuaj yeem hloov cov theem ntawm kev tsim cov nroj tsuag loj hlob hauv cov nroj tsuag.
Qhov txawv ntawm Auxin Gibberellin thiab Cytokinin yog dab tsi?
Hauv cov nroj tsuag, auxins feem ntau koom nrog hauv kev tua elongation thaum gibberellins feem ntau pab txhawb cov noob germination thiab cytokinins koom nrog hauv cell faib thiab sib txawv. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm auxin gibberellin thiab cytokinin. Lawv kuj sib txawv hauv lawv cov qauv tshuaj; auxins thiab cytokinin muaj cov qauv nrog sab chains thaum Gibberellin muaj cov qauv tsis muaj cov saw hlau. Ntxiv mus, qhov pib compound ntawm auxin thiab cytokinin synthesis yog adenosine, thaum nyob rau hauv Gibberellin nws yog trans-geranylgeranyl diphosphate (GGDP).
Daim duab hauv qab no qhia qhov txawv ntawm auxin gibberellin thiab cytokinin rau ib sab ntawm kev sib piv.
Summary – Auxin vs Gibberellin vs Cytokinin
Cov tshuaj hormones cog yog qhov tseem ceeb hauv kev ua kom muaj kev loj hlob ruaj khov thiab noj qab nyob zoo ntawm cov nroj tsuag. Auxin, Gibberellin thiab cytokinin yog peb pawg tseem ceeb ntawm cov tshuaj hormones cog uas tshwm sim hauv cov hauv paus hniav ntawm cov nroj tsuag. Auxin koom nrog hauv kev tua elongation, thaum gibberellins ua lub luag haujlwm tseem ceeb hauv cov noob germination thiab cytokinin hauv cell faib thiab sib txawv. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm auxin gibberellins thiab cytokinin. Cov kev sib txawv ntawm peb qhov no pab txhawb kev loj hlob zoo hauv cov nroj tsuag sib txawv. Txawm hais tias cov no yog ib txwm tsim nyob rau hauv cov nroj tsuag, cov tshuaj hormones no yuav tsum tau ntxiv thaum lub sij hawm cog qoob loo. Yog li ntawd, lawv kuj tau ua lag luam los ntawm cov nplai loj, qhia txog kev lag luam xav tau rau cov nroj tsuag loj hlob no.
