Ofufuza ochokera ku Dipatimenti ya Biochemistry ku Indian Institute of Sciences (IISc) apeza njira yomwe yakhala ikufunidwa kwa nthawi yayitali yowongolera kukula kwa zomera zakale monga bryophytes (gulu lomwe limaphatikizapo mosses ndi liverworts) zomwe zidasungidwa m'zomera zomwe zidatulutsa maluwa pambuyo pake.
Kafukufukuyu, wofalitsidwa mu magazini ya Nature Chemical Biology, adayang'ana kwambiri pa malamulo osavomerezeka a mapuloteni a DELLA, omwe ndi olamulira wamkulu wa kukula kwa maselo omwe amaletsa kugawikana kwa maselo m'ma embryophytes (zomera zakuthengo).
Chochititsa chidwi n'chakuti, bryophytes, zomera zoyamba kuonekera panthaka zaka pafupifupi 500 miliyoni zapitazo, sizili ndi cholandirira cha GID1 ngakhale kuti zimapanga phytohormone GA. Izi zikubweretsa funso la momwe kukula ndi chitukuko cha zomera zoyambirira zapanthaka izi zinalamuliridwira.
Pogwiritsa ntchito liverwort Marchantia polymorpha ngati njira yotsanzira, ofufuzawa adapeza kuti zomera zakalezi zimagwiritsa ntchito enzyme yapadera, MpVIH, yomwe imapanga cell messenger inositol pyrophosphate (InsP₈), zomwe zimawalola kuswa DELLA popanda kufunika kwa gibberellic acid.
Ofufuzawo adapeza kuti DELLA ndi imodzi mwa zolinga za maselo a VIH kinase. Komanso, adawona kuti zomera zopanda MpVIH zimatsanzira mawonekedwe a zomera za M. polymorpha zomwe zimachulukitsa DELLA.
"Panthawiyi, tinali okondwa kumvetsetsa ngati kukhazikika kwa DELLA kapena ntchito zake zikuwonjezeka m'zomera zopanda MpVIH," anatero Priyanshi Rana, wolemba woyamba komanso wophunzira womaliza maphunziro mu gulu lofufuza la Lahey. Mogwirizana ndi lingaliro lawo, ofufuzawo adapeza kuti kuletsa DELLA kunapulumutsa kwambiri kukula ndi chitukuko cholakwika cha zomera zosinthika za MpVIH. Zotsatirazi zikusonyeza kuti VIH kinase imalamulira molakwika DELLA, motero imalimbikitsa kukula ndi chitukuko cha zomera.
Kafukufuku wokhudza mapuloteni a DELLA unayamba nthawi ya Green Revolution, pomwe asayansi mosadziwa adagwiritsa ntchito mphamvu zawo popanga mitundu ya semi-dwarf yobala zipatso zambiri. Ngakhale kuti tsatanetsatane wa momwe amagwirira ntchito sunali womveka bwino panthawiyo, ukadaulo wamakono umalola asayansi kusintha magwiridwe antchito a mapuloteniwa kudzera muukadaulo wa majini, ndikuwonjezera zokolola za mbewu.
Kuphunzira za zomera zoyambirira zapadziko lapansi kumaperekanso chidziwitso cha kusintha kwawo m'zaka 500 miliyoni zapitazi. Mwachitsanzo, ngakhale kuti zomera zamakono zamaluwa zimasokoneza mapuloteni a DELLA pogwiritsa ntchito njira yodalira gibberellic acid, malo omangira a InsP₈ amasungidwa. Zomwe zapezekazi zimapereka chidziwitso cha kusintha kwa njira zolumikizirana ndi maselo pakapita nthawi.
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Nthawi yotumizira: Sep-15-2025