Abaphandi abasuka kwiSebe leBiochemistry kwiZiko leSayensi laseIndiya (IISc) baye bafumanisa indlela ekudala ifunwa yokulawula ukukhula kwezityalo zamandulo zomhlaba ezifana ne-bryophytes (iqela elibandakanya ubulembu kunye ne-liverworts) eyayigcinwe kwizityalo ezidubula kamva.
Uphononongo, olupapashwe kwijenali ye-Nature Chemical Biology, igxininise ekulawuleni okungeyona i-canonical yeeprotheni ze-DELLA, umlawuli wokukhula oyintloko ocinezela ukuhlukana kweeseli kwi-embryophytes (izityalo zomhlaba).
Okubangela umdla kukuba, iibryophytes, izityalo zokuqala ukuvela emhlabeni malunga neminyaka eyi-500 yezigidi eyadlulayo, ayinayo i-GID1 receptor nangona ivelisa i-phytohormone GA. Oku kuphakamisa umbuzo wokuba kwakulawulwa njani ukukhula nophuhliso lwezi zityalo zamandulo.
Ukusebenzisa i-liverwort Marchantia polymorpha njengenkqubo yomzekelo, abaphandi bafumanisa ukuba ezi zityalo zamandulo zisebenzisa i-enzyme ekhethekileyo, i-MpVIH, evelisa i-cell messenger inositol pyrophosphate (InsP₈), evumela ukuba baphule i-DELLA ngaphandle kwesidingo se-gibberellic acid.
Abaphandi bafumanisa ukuba i-DELLA yenye yeethagethi zeselula ze-VIH kinase. Ngaphezu koko, baqaphela ukuba izityalo ezingenayo i-MpVIH zilinganisa i-phenotypes yezityalo ze-M. polymorpha ezigqithisa ngokugqithiseleyo i-DELLA.
"Ngeli xesha, sasivuyiswe ukuqonda ukuba ukuzinza kwe-DELLA okanye umsebenzi wanda kwizityalo ezingenayo i-MpVIH," kusho uPriyanshi Rana, umbhali wokuqala kunye nomfundi ophumelele kwiqela lophando likaLahey. Ngokuhambelana ne-hypothesis yabo, abaphandi bafumanisa ukuba ukuthintela i-DELLA kuhlangule kakhulu ukukhula okungalunganga kunye nophuhliso lwe-phenotypes yezityalo eziguqukayo ze-MpVIH. Ezi ziphumo zibonisa ukuba i-VIH kinase ilawula kakubi i-DELLA, ngaloo ndlela ikhuthaza ukukhula kwezityalo kunye nophuhliso.
Uphando kwiiproteni ze-DELLA lusukela emva kwiNguquko yoHlaza, xa oosonzululwazi bengazi ukuba basebenzise amandla abo ekuphuhliseni iintlobo ezivelisa isivuno esikhulu se-semi-dwarf. Nangona iinkcukacha zendlela ababesebenza ngayo yayingacacanga ngelo xesha, ubuxhakaxhaka bale mihla buvumela izazinzulu ukuba zilawule imisebenzi yezi proteni ngobunjineli bemfuza, ngokufanelekileyo ukwandisa izivuno zezityalo.
Ukufunda ngezityalo zamandulo zomhlaba nako kunika ulwazi malunga nokuvela kwazo kwiminyaka eyi-500 yezigidi edlulileyo. Umzekelo, nangona iintyatyambo zanamhlanje ziphazamisa iiprotheni ze-DELLA ngokusebenzisa i-gibberellic acid-dependent mechanism, iindawo zokubopha i-InsP₈ zigciniwe. Ezi ziphumo zibonelela ngengqiqo malunga nokuvela kweendlela zokubonisa iiseli ngokuhamba kwexesha.
Eli nqaku liprintwa kwakhona kwimithombo elandelayo. Qaphela: Okubhaliweyo kungahlelwa ubude kunye nomxholo. Ngolwazi oluthe vetshe, nceda uqhagamshelane nomthombo. Umgaqo-nkqubo wethu wokukhutshwa kweendaba unokufumaneka apha.
Ixesha lokuposa: Sep-15-2025