Dab tsi induces ethylene tsim nyob rau hauv cov nroj tsuag?

Video: Dab tsi induces ethylene tsim nyob rau hauv cov nroj tsuag?

2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17

Environmental thiab biological ua rau ntawm ethylene

Ib puag ncig cues xws li dej nyab, dej qhuav, txias, mob, thiab kab mob tuaj yeem induce ethylene tsim nyob rau hauv cov nroj tsuag . Nyob rau hauv dej nyab, cov hauv paus hniav raug kev txom nyem los ntawm tsis muaj oxygen, los yog anoxia, uas ua rau lub synthesis ntawm 1-aminocyclopropane-1-carboxylic acid (ACC).

Yog li ntawd, ethylene tsim nyob rau hauv cov nroj tsuag li cas?

Ethylene yog tsim tawm nyob rau hauv tag nrho cov siab nroj tsuag thiab yog tsim tawm los ntawm methionine nyob rau hauv tag nrho cov ntaub so ntswg. ATP thiab dej ntxiv rau methionine ua rau poob ntawm peb phosphates thiab S-adenosyl methionine. 1-amino-cyclopropane-1-carboxylic acid synthase (ACC-synthase) pab txhawb rau ntau lawm ACC los ntawm SAM.

Ib yam li ntawd, ethylene cuam tshuam rau cov nroj tsuag loj hlob li cas? Ethylene cuam tshuam ob lub kev loj hlob thiab kev loj hlob ntawm nroj tsuag [4]. Hais txog kev loj hlob, ethylene feem ntau suav hais tias yog 'kev laus' cov tshuaj hormones, raws li nws nrawm thiab qee zaum xav tau rau cov txheej txheem xws li ripening, senescence, thiab abscission.

Tsis tas li ntawd, dab tsi txhawb kev tso tawm ntawm ethylene?

Ethylene thiab Auxin Qhov kev ua ntawm ethylene ntawm nplooj loj hlob tuaj yeem yog auxin-dependent lossis auxin-independent. Hormonal kev sib koom tes yog ib qho tseem ceeb, uas tswj cov txheej txheem ntawm nplooj. Auxin induces ethylene ntau lawm, thiab ntau qhov cuam tshuam ntawm exogenous auxins yog, qhov tseeb, ethylene cov lus teb (Abeles li al., 1992).

Yuav ua li cas yog ethylene ib tug tshwj xeeb cov tshuaj hormones?

Cov ntsiab lus. Ethylene yog thawj-qhia cog tshuaj hormones paub los tswj ntau txheej txheem hauv cog kev loj hlob, kev loj hlob, thiab teb rau biotic thiab abiotic stresses. Ethylene paub zoo tshaj plaws rau nws cov nyhuv ntawm cov txiv hmab txiv ntoo ripening thiab lub cev abscission, thiab yog li muaj kev lag luam tseem ceeb hauv kev ua liaj ua teb.

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