Dab tsi yog cov tshuaj tiv thaiv gibberellins?
Dab tsi yog cov tshuaj tiv thaiv gibberellins?

Video: Dab tsi yog cov tshuaj tiv thaiv gibberellins?

Video: Dab tsi yog cov tshuaj tiv thaiv gibberellins?
Video: Tshuaj tiv thaiv dab tsog zoo kawg 2024, Kaum ib hlis
Anonim

tshuaj antigibberellin. txhua yam khoom uas ua rau kev loj hlob ntawm luv luv tuab stems, i.e. uas muaj qhov cuam tshuam rau GIBERELLINS . Maleic hydrazide yog ib qho antigiberellin siv los retard nyom kev loj hlob thiab yog li txo qhov zaus ntawm kev txiav. Collins phau ntawv txhais lus ntawm Biology, 3rd ed.

Cov lus nug tseem yog, yuav ua li cas gibberellins cuam tshuam cov nroj tsuag?

Gibberellins yog tsim nyob rau hauv loj dua thaum lub cog yog raug rau qhov txias txias. Lawv txhawb nqa cell elongation, tawg thiab budding, seedless txiv hmab txiv ntoo, thiab noob germination. Lawv ua qhov kawg los ntawm kev rhuav tshem cov noob dormancy thiab ua raws li tus xa xov chemical.

Kuj Paub, ga3 ua haujlwm li cas? GA 3 Growth Hormone Thaum lub sij hawm ntawd, ib tug fungus cuam tshuam cov qoob loo kom nws ua rau cov nroj tsuag loj hlob siab thaum halting zus tau tej cov noob. Ib qho ntawm cov tebchaw no, tam sim no hu ua GA 3 , yog gibberellic acid uas tsim ntau tshaj plaws rau kev siv. GA 3 Kev loj hlob hormone yog ib qho tseem ceeb rau kev ua liaj ua teb, science thiab horticulture.

Xav txog qhov no, dab tsi yog qhov cuam tshuam ntawm gibberellins?

Cov yam ntxwv tshaj plaws teebmeem ntawm GA ntawm tua kev loj hlob yog nce inter-node extension, nce nplooj-loj hlob thiab txhim kho apical dominance. Hauv qee qhov xwm txheej, nrog qee hom nroj tsuag, kev kho mob nrog GA tsis txhawb kev loj hlob ntawm cov hauv paus hniav, txawm tias qee cov hauv paus hniav teb los ntawm kev loj hlob ntxiv.

Ga cuam tshuam cov nroj tsuag li cas?

GA stimulates lub hlwb ntawm germinating noob los tsim mRNA molecules uas code rau hydrolytic enzymes. Lawv tuaj yeem txhawb nqa ceev qia thiab hauv paus kev loj hlob, induce mitotic faib nyob rau hauv nplooj ntawm ib co nroj tsuag , thiab nce noob germination tus nqi.

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