Posachedwapa, Pulofesa Chunxiang You waku Shandong Agricultural University ndi anzake adasindikiza nkhani yowunikiranso yotchedwa "Lamulo la kukhwima kwa zipatso zamtundu: kuchokera kuzinthu zolembera mpaka kusintha kwa epigenetic" Kafukufuku wa Horticulture.
"Mukuwunikaku, tikambirana zomwe zachitika posachedwa zinthu zolembedwa zomwe zimayang'anira kucha molumikizana ndi ethylene ndi zizindikiro zachilengedwe (kuwala ndi kutentha) mumtundu wa phwetekere chomera (Solanum lycopersicum) ndi zipatso zina zamtundu. Timagogomezera maudindo ofunikira a epigenetic regulation, "akutero olemba.
Ethylene imapangitsa njira yolumikizirana bwino yomwe imagwirizanitsa kukula kwa mbewu ndi chitukuko ndi kucha kwa zipatso, ndipo umboni wochuluka umasonyeza kuti ethylene, pamodzi ndi mahomoni ena amtundu wa zomera, amagwira ntchito ndi ma TF okhudzana ndi kucha kuti athetsere kukhwima kwa zipatso. Pepalali likuwunikiranso machitidwe a ma molekyulu a TF omwe amawongolera kukhwima kwa zipatso m'mayendedwe odalira ethylene komanso / kapena -odziyimira pawokha.
Kutengera phwetekere mwachitsanzo, ma TF monga NACs, NOR, MOR-like1, HB-1, WRKY1, GRAS4/38, ARF2A/2B, ndi AREB amawongolera kufotokozera kwa ethylene ndi majini okhudzana ndi kucha motengera ethylene, potero bwino malamulo akucha zipatso. Kudzikundikira ndi kuwonongeka kwa chlorophyll panthawi yakucha kumayendetsedwa ndi ma TF osiyanasiyana, kuphatikiza GLK1/2, ARFs, ndi TKN2/4, mopanda ethylene, ndipo izi zimasinthidwanso ndi kuyanjana kwa mahomoni ndi ma sign opepuka. . MADS-box TFs (RIN, FUL1/2, TGL1) ndi ethylene amapanga dera lowongolera lomwe limayang'anira kucha kwa zipatso mu ethylene-odalira komanso odziyimira pawokha.
Kafukufuku waposachedwapa wasonyeza kuti kusintha kwa epigenetic kumathandizanso kuti zipatso zipse. DNA methylation, histone methylation, ndi acetylation ndikusintha kwakukulu kwa epigenetic komwe kumakhudza kukhwima kwa zipatso, komwe DNA methylation ndi H3K27me3 histone methylation ndi zizindikiro zopondereza za epigenetic. N6methyladenosine (m6A) ndiye kusintha kofala kwambiri kwa mRNA mu eukaryotes, ndipo kafukufuku waposachedwa wavumbulutsa a ndondomeko yowonongeka mwa m6Kusintha kwa mRNA ndi DNA methylation yomwe imayang'anira kucha kwa phwetekere.
Pomaliza, olembawo amawunikiranso mawonekedwe ogwirira ntchito a phytohormones, ma TF okhudzana ndi kucha, ndi kusintha kwa epigenetic pa kayendetsedwe kabwino ka kukhwima kwa zipatso za phwetekere, zomwe, monga amanenera olemba, "zingakhale ngati chitsogozo pophunzira njira zoyendetsera kukhwima kwa mitundu ina ya zipatso," ndi "kuwongolera njira zatsopano zogwiritsidwira ntchito moyenera."
Gwero: https://phys.org