Tsis ntev los no, xibfwb Chunxiang Koj los ntawm Shandong Agricultural University thiab nws cov npoj yaig tau luam tawm tsab xov xwm tshuaj xyuas lub npe "Kev cai ntawm cov txiv hmab txiv ntoo siav: los ntawm cov khoom hloov pauv mus rau kev hloov pauv ntawm epigenetic" hauv Kev Tshawb Fawb Txog Kev Tshawb Fawb.
"Nyob rau hauv qhov kev tshuaj xyuas no, peb tham txog kev paub txog tam sim no yam hloov ua lwm yam uas tswj ripening ua ke nrog ethylene thiab ib puag ncig cov cim (lub teeb thiab kub) hauv cov qauv cog txiv lws suav (Solanum lycopersicum) thiab lwm yam txiv hmab txiv ntoo fleshy. Peb hais txog lub luag haujlwm tseem ceeb ntawm kev tswj hwm epigenetic, "cov kws sau ntawv hais.
Ethylene induces ib txoj kev teeb pom kev zoo uas muaj kev sib koom tes cog kev loj hlob thiab kev loj hlob thiab txiv hmab txiv ntoo ripening, thiab cov pov thawj tseem ceeb qhia tau hais tias ethylene, ua ke nrog rau lwm yam endogenous cog cov tshuaj hormones, ua hauj lwm nrog ripening-txog TFs los tswj cov txiv hmab txiv ntoo ripening. Daim ntawv no tshuaj xyuas cov txheej txheem molecular ntawm TFs uas tswj cov txiv hmab txiv ntoo ripening nyob rau hauv ethylene-dependent thiab/los yog-kev ywj pheej yam ntxwv.
Noj txiv lws suav ua piv txwv, TFs xws li NACs, NOR, MOR-like1, HB-1, WRKY1, GRAS4/38, ARF2A / 2B, thiab AREB upregulate cov kev qhia ntawm ethylene thiab ripening-txog cov noob nyob rau hauv ib qho ethylene-dependent yam, li no zoo regulating txiv hmab txiv ntoo ripening. Kev sib sau thiab degradation ntawm chlorophyll thaum lub txiv lws suav siav yog tswj los ntawm ntau yam TFs, suav nrog GLK1/2, ARFs, thiab TKN2/4, nyob rau hauv ib qho ethylene ywj siab, thiab cov txheej txheem no kuj tau hloov kho los ntawm kev sib cuam tshuam ntawm cov tshuaj hormones thiab teeb liab teeb liab. . MADS-box TFs (RIN, FUL1/2, TAGL1) thiab ethylene muaj xws li kev tswj xyuas Circuit Court uas tswj cov txiv hmab txiv ntoo ripening hauv ib qho ethylene-dependent thiab ywj siab yam.
Cov kev tshawb fawb tsis ntev los no tau pom tias kev hloov pauv ntawm epigenetic kuj ua lub luag haujlwm tseem ceeb hauv cov txiv hmab txiv ntoo ripening. DNA methylation, histone methylation, thiab acetylation yog cov kev hloov pauv tseem ceeb ntawm cov noob qoob loo uas cuam tshuam cov txiv hmab txiv ntoo ripening, ntawm cov DNA methylation thiab H3K27me3 histone methylation yog cov cim epigenetic repressive. N6-methyladenosine (m6A) yog qhov kev hloov kho mRNA tshaj plaws hauv eukaryotes, thiab cov kev tshawb fawb tsis ntev los no tau qhia txog a tawm tswv yim voj nruab nrab m6Kev hloov kho mRNA thiab DNA methylation uas tswj cov txiv lws suav txiv hmab txiv ntoo ripening.
Hauv kev xaus, cov kws sau ntawv tshuaj xyuas cov qauv ua haujlwm ntawm phytohormones, ripening-txog TFs, thiab kev hloov kho epigenetic rau txoj cai tswj hwm ntawm txiv lws suav txiv hmab txiv ntoo ripening, uas, raws li cov sau phau ntawv hais, "tej zaum yuav ua raws li cov lus qhia thaum kawm cov txheej txheem tswj ripening nyob rau hauv lwm yam txiv hmab txiv ntoo hom," thiab "qhia cov tswv yim tshiab rau nws zoo manipulation."
Ib qhov chaw: https://phys.org