Kwanan nan, Farfesa Chunxiang You daga Jami'ar Aikin Noma ta Shandong tare da abokan aikinta sun buga wani labarin bita mai taken "Ka'idojin ripening 'ya'yan itace: daga abubuwan rubutawa zuwa gyare-gyare na epigenetic" Binciken Horticulture.
"A cikin wannan bita, mun tattauna batun ilimin halin yanzu abubuwan dalilai wanda ke tsara ripening tare da ethylene da siginar muhalli (haske da zafin jiki) a cikin samfurin shuka tumatir (Solanum lycopersicum) da sauran 'ya'yan itace na jiki. Muna jaddada muhimman ayyuka na ka'idojin epigenetic," in ji marubutan.
Ethylene yana haifar da ingantaccen tsarin sigina wanda ke daidaitawa girma shuka da ci gaba da girma da 'ya'yan itace, da kuma kwararan shaidu sun nuna cewa ethylene, tare da sauran kwayoyin halittar kwayoyin halitta, suna aiki tare da TFs masu alaka da ripening don daidaita tsarin ripening 'ya'yan itace. Wannan takarda tana duba hanyoyin ƙwayoyin ƙwayoyin cuta na TFs waɗanda ke daidaita yawan 'ya'yan itace a cikin dogaro da ethylene da/ko - halaye masu zaman kansu.
Ɗaukar tumatur a matsayin misali, TFs irin su NACs, NOR, MOR-like1, HB-1, WRKY1, GRAS4/38, ARF2A/2B, da AREB suna daidaita bayyanar da ethylene da ripening genes a cikin hanyar da ta dogara da ethylene. game da shi tabbatacce regulating 'ya'yan itace ripening. Tattaunawa da lalata chlorophyll a lokacin girma tumatir ana tsara su ta hanyar TFs iri-iri, ciki har da GLK1/2, ARFs, da TKN2/4, ta hanyar ethylene mai zaman kanta, kuma wannan tsari yana canzawa ta hanyar haɗin gwiwar hormones da alamun haske. . MADS-box TFs (RIN, FUL1/2, TAGL1) da ethylene sun ƙunshi da'ira mai tsari wanda ke daidaita yawan 'ya'yan itace a cikin kayan kwalliya-dogara kuma mai zaman kansa hanya.
Binciken da aka yi kwanan nan ya nuna cewa gyare-gyaren epigenetic kuma suna taka muhimmiyar rawa wajen girma 'ya'yan itace. DNA methylation, histone methylation, da acetylation su ne manyan gyare-gyare na epigenetic da ke tasiri ga ripening 'ya'yan itace, daga cikinsu DNA methylation da H3K27me3 histone methylation ne danniya epigenetic alamomi. N6- methyladenosine (m6A) shine mafi yawan gyare-gyaren mRNA a cikin eukaryotes, kuma binciken kwanan nan ya bayyana a feedback madauki tsakanin m6Gyaran mRNA da DNA methylation wanda ke daidaita yawan 'ya'yan tumatir.
A ƙarshe, marubutan sun sake nazarin tsarin aiki na phytohormones, TFs masu alaƙa da girma, da Epigenetic gyare-gyare don ƙayyadaddun ƙa'idodin ripening 'ya'yan tumatir, wanda, kamar yadda mawallafa suka faɗa, "na iya zama jagora lokacin nazarin hanyoyin da ke tsara ripening a cikin sauran nau'in 'ya'yan itace," da kuma "jagoranci sabbin dabaru don yin amfani da shi."
Tushe: https://phys.org
