Abaphandi abavela kwiSebe leBiochemistry kwi-Indian Institute of Sciences (IISc) bafumanise indlela ekudala ifunwa yokulawula ukukhula kwezityalo zasemhlabeni ezidala ezifana ne-bryophytes (iqela eliquka ii-mosses kunye ne-liverworts) ezagcinwa kwizityalo ezidubula kamva.
Olu phononongo, olupapashwe kwiphephancwadi iNature Chemical Biology, lugxile kulawulo olungelulo olusemthethweni lweeproteni zeDELLA, umlawuli oyintloko wokukhula othintela ukwahlukana kweeseli kwi-embryophytes (izityalo zomhlaba).
Okubangel’ umdla kukuba, ii-bryophytes, izityalo zokuqala ukuvela emhlabeni kwiminyaka emalunga nezigidi ezingama-500 eyadlulayo, azinayo i-GID1 receptor nangona ivelisa i-phytohormone GA. Oku kuphakamisa umbuzo wokuba ukukhula nophuhliso lwezi zityalo zokuqala zomhlaba lwalulawulwa njani.
Besebenzisa i-liverwort Marchantia polymorpha njengenkqubo yomzekelo, abaphandi bafumanise ukuba ezi zityalo zamandulo zisebenzisa i-enzyme ekhethekileyo, i-MpVIH, evelisa i-cellular messenger inositol pyrophosphate (InsP₈), evumela ukuba ziqhekeze i-DELLA ngaphandle kwesidingo se-gibberellic acid.
Abaphandi bafumanise ukuba i-DELLA yenye yeethagethi zeseli ze-VIH kinase. Ngaphezu koko, baqaphele ukuba izityalo ezingenayo i-MpVIH zixelisa ii-phenotypes zezityalo ze-M. polymorpha ezikhupha i-DELLA kakhulu.
“Ngeli xesha, besinomdla wokuqonda ukuba ingaba uzinzo okanye umsebenzi weDELLA uyanda kwizityalo ezingenayo iMpVIH,” utshilo uPriyanshi Rana, umbhali wokuqala kunye nomfundi ophumeleleyo kwiqela lophando likaLahey. Ngokuhambelana nengcamango yabo, abaphandi bafumanise ukuba ukuthintela iDELLA kusindise kakhulu ukukhula okuneziphene kunye nophuhliso lwezityalo eziguqulweyo zeMpVIH. Ezi ziphumo zibonisa ukuba iVIH kinase iyilawula kakubi iDELLA, ngaloo ndlela ikhuthaza ukukhula kunye nophuhliso lwezityalo.
Uphando malunga neeproteni zeDELLA luqala kwiNguquko yeGreen, xa izazinzulu zingazi zasebenzisa amandla azo okuvelisa iintlobo ze-semi-dwarf ezivelisa kakhulu. Nangona iinkcukacha zendlela ezazisebenza ngayo zazingacacanga ngelo xesha, ubuchwepheshe banamhlanje buvumela izazinzulu ukuba zilawule imisebenzi yezi proteni ngokusebenzisa ubunjineli bemfuza, nto leyo eyandisa ngempumelelo isivuno sezityalo.
Ukufunda izityalo zasemhlabeni zakuqala kukwabonelela ngengqiqo malunga nophuhliso lwazo kwiminyaka eyi-500 yezigidi edlulileyo. Umzekelo, nangona izityalo zanamhlanje eziqhakazayo ziphazamisa iiproteni zeDELLA ngokusebenzisa indlela exhomekeke kwi-gibberellic acid, iindawo zokubopha ze-InsP₈ ziyagcinwa. Ezi ziphumo zibonelela ngengqiqo malunga nophuhliso lweendlela zokubonisa iiseli ngokuhamba kwexesha.
Eli nqaku liphinde lashicilelwa kwimithombo elandelayo. Qaphela: Isicatshulwa singahlelwa ngokwexesha kunye nomxholo. Ukuze ufumane ulwazi oluthe kratya, nceda unxibelelane nomthombo. Umgaqo-nkqubo wethu wokukhupha iindaba ungafumaneka apha.
Ixesha leposi: Septemba-15-2025