Bafuputsi ba Setsi sa John Innes le balekane ba bona Setsing sa Machaena sa Mahlale ba Sechaena ba khethile phetoho ea limolek'hule e khethollang kholo e fapaneng ea lisele le sebopeho sa litho tsa semela. Sebaka sa marang-rang sa Phys.org.
Auxin e laolang kholo e khothalletsa kholo ea lisele ka protheine e ka holimo e bitsoang transmembrane kinase 1 (TMK1). Ka holim'a sele, protheine ena e fetola thepa ea lerako la lisele tse khothalletsang kholo ea lisele. Empa TMK1 e boetse e bonts'a phello e fapaneng ea ho hola ka har'a nucleus ea sele, moo e hatellang kholo ea lisele ka ho fokotsa polelo ea liphatsa tsa lefutso tsa auxin.
Ngaka Bengo Gu le basebetsi-'moho ba bontšitse kamoo TMK1 e etsang mesebetsi ena e bonahalang e hanyetsana likarolong tse fapaneng tsa sele. Ho phunyeha ha protheine ea TMK1 ho etsahala ka holim'a sele, karolo ea protheine e arohaneng e fetisetsoa khubung ea eona. Le hoja ts'ebetso ena e tloaelehile, ho khetholla liprotheine tse amehang ho cleavage ho kile ha e-ba thata.
Liprotheine tse amehang ke litho tsa lelapa la DA1 peptidase. Li-enzyme tsena li senya liprotheine tse fapaneng tse amehang karabelong ea kholo le ho khothaletsa kholo ea litho tsa semela.
Pontšo ea DA1 ea lelapa la TMK1 ea cleavage e bonts'a mokhoa oa ho fetola phallo ea tlhahisoleseling ho tloha bokaholimo ba sele ho ea khubung, ho bopa boholo ba sele le kholo ea setho. Boikemisetso ba mekhoa ena bo etsa tlatsetso ea bohlokoa kutloisisong ea mekhoa ea ho hōla ha limela.
Mosebetsi ona o paka hore li-peptidase tsa lelapa la DA1 li ama phetisetso ea li-hormone, e supang mokhoa o tloaelehileng oa phetisetso ea lets'oao ho tloha lera la plasma ho ea khubung. Liphuputso li ka fana ka mokhoa oa ho ntlafatsa ho mela ha peo ea lijalo.