GA3 (Gibberellik acid)yog ib qho tseem ceeb ntawm cov tshuaj hormones endogenous uas txhawb cov nroj tsuag kev loj hlob thiab kev loj hlob. Nyob rau hauv cov nroj tsuag, GA3 yog synthesized nyob rau hauv germinating noob, hluas tua, loj hlob nplooj, blooming paj, stamens, paj ntoos nplej, txiv hmab txiv ntoo, thiab cov hauv paus hniav. GA3 synthesized nyob rau hauv cov hauv paus hniav txav mus rau pem hauv ntej, thaum uas ua rau ntawm lub apex txav downward. Nws thauj tshwm sim los ntawm phloem, thiab qhov ceev yog piv rau cov photosynthate translocation. Exogenous GA3 nthuav tawm ntau yam kev mob physiological zoo ib yam li cov endogenous gibberellins, xws li hloov qhov piv ntawm poj niam mus rau txiv neej paj hauv qee cov qoob loo, inducing parthenocarpy, accelerating kev loj hlob ntawm ib co txiv hmab txiv ntoo, thiab txhawb cov txiv hmab txiv ntoo; rhuav tshem cov noob dormancy, nce germination, accelerating qia elongation thiab bolting nyob rau hauv ib co nroj tsuag; nce nplooj nplooj, txhawb cov tub ntxhais hluas tua kev loj hlob, pab txhawb metabolite tsub zuj zuj hauv phloem, thiab ua kom lub cambium; thiab inhibiting maturation, senescence, lateral bud dormancy, thiab tuber tsim. Regulators xws li paclobutrazol thiab daminozide tuaj yeem cuam tshuam cov biosynthesis ntawm GA3 nyob rau hauv cov nroj tsuag, thiab GA3 ua raws li ib tug zoo antagonist rau cov regulators.
①Thaum lub sij hawm fruiting theem ntawm grapes,GA 3tuaj yeem nce qib ntawm gibberellins thiab auxins hauv cov txiv hmab txiv ntoo hluas, tiv thaiv kev tsim ntawm abscission txheej, thiab nyiam cov as-ham rau cov txiv hmab txiv ntoo hluas, yog li txhim kho cov txiv hmab txiv ntoo. Qhov pom zoo pom zoo feem ntau yog li ntawm 12.5 txog 100 mg / L.
②Txau los yog dipping cov pawg ntawm qee yam txiv hmab txiv ntoo los ntawm kev tawg paj mus rau hauv 5 hnub tom qab nplooj poob poob loj zuj zus tuaj. Qhov no feem ntau ua tiav los ntawm kev txhawb nqa kev faib tawm ntawm tes, tshwj xeeb tshaj yog nyob rau hauv apical meristem, ua rau elongation thiab loj ntawm cov paj hlwb.
③Kev tawg cov noob dormancy: Dormant txiv hmab txiv ntoo tuaj yeem raug yuam kom germinate los ntawm soaking lawv nyob rau hauv ib tug siab concentration (8,000 mg / L) ntawm GA3 rau kwv yees li 20 teev.
④Rau qee cov txiv hmab txiv ntoo thiab cov txiv hmab txiv ntoo uas tsis muaj noob nrog ntau cov kab sib xyaw ua ke, thov 1-5 mg / L GA3 rau inflorescences ua ntej paj, lossis 10-15 mg / L.GA 3Thaum lub sij hawm flowering, tuaj yeem elongate lub rachis thiab txo cov txiv hmab txiv ntoo, yog li ua tiav pawg loosening.
⑤Ua kom cov noob qoob loo nce ntxiv: Rau cov txiv hmab txiv ntoo hauv paus ntau yam nrog kev loj hlob tsis muaj zog thiab luv luv internodes, nrog rau niam txiv hmab txiv ntoo siv rau kev txiav propagation, ntau zaus txau qis -concentrationGA 3Kev daws thaum lub caij cog qoob loo tuaj yeem txhawb kev loj hlob ntawm vine, elongate internodes, nce tua tawm los, thiab txhim kho kev siv txiav.
