Kua kitea e ngā kairangahau o te Tari Matū Koiora i te Indian Institute of Sciences (IISc) tētahi tikanga kua roa e rapuhia ana mō te whakahaere i te tipu o ngā tipu whenua taketake pērā i ngā bryophytes (he rōpū kei roto ko ngā mosses me ngā ateworts) i puritia i roto i ngā tipu pua o muri mai.
Ko te rangahau, i whakaputaina i roto i te puka Nature Chemical Biology, i arotahi ki te whakahaere kore-tikanga o ngā pūmua DELLA, he kaiwhakahaere tipu matua e pehi ana i te wehenga pūtau i roto i ngā embryophytes (ngā tipu whenua).
He mea whakamīharo, ko ngā bryophytes, arā, ngā tipu tuatahi i puta ki te whenua i te 500 miriona tau ki muri, kāore i a rātou te kaiwhakawhiwhi GID1 ahakoa i whakaputahia e rātou te phytohormone GA. Ka ara ake te pātai mō te whakahaere i te tipu me te whanaketanga o ēnei tipu whenua o mua.
Mā te whakamahi i te pūwero ate o te Marchantia polymorpha hei tauira pūnaha, i kitea e ngā kairangahau he whākōkī motuhake tā ēnei tipu taketake, ko te MpVIH, e whakaputa ana i te inositol pyrophosphate karere pūtau (InsP₈), e āhei ai rātou ki te wawahi i a DELLA me te kore e hiahiatia he waikawa gibberellic.
I kitea e ngā kairangahau ko DELLA tētahi o ngā pūtau e whai pānga ana ki te VIH kinase. I tua atu, i kitea e rātou ko ngā tipu kāore i te MpVIH ka whai i ngā momo āhua o ngā tipu M. polymorpha e whakaputa nui ana i te DELLA.
"I tēnei wā, i harikoa mātou ki te mārama mēnā kei te piki ake te pumau, te ngohe rānei o DELLA i roto i ngā tipu ngoikore-MpVIH," te kī a Priyanshi Rana, te kaituhi tuatahi me te tauira paerua i roto i te rōpū rangahau a Lahey. E ai ki tā rātou whakapae, i kitea e ngā kairangahau ko te aukati i a DELLA i whakaora nui i ngā momo tipu me te whanaketanga hapa o ngā tipu whakarerekētanga MpVIH. E kī ana ēnei hua ko te VIH kinase te whakahaere kino i a DELLA, ā, nā reira ka whakatairanga i te tipu me te whanaketanga o ngā tipu.
I tīmata te rangahau mō ngā pūmua DELLA i te Huringa Kakariki, i te wā i whakamahia ai e ngā kaipūtaiao tō rātou pūmanawa ki te whakawhanake i ngā momo hua-iti teitei. Ahakoa kāore i te mārama ngā taipitopito o tā rātou mahi i taua wā, mā te hangarau hou ka taea e ngā kaipūtaiao te whakahaere i ngā mahi a ēnei pūmua mā te hangarau ira, ka piki ake ai ngā hua o te hua.
Mā te ako i ngā tipu whenua o mua ka kitea anō hoki tō rātou whanaketanga i roto i ngā tau 500 miriona kua hipa. Hei tauira, ahakoa ka whakararuraru ngā tipu puāwai o ēnei rā i ngā pūmua DELLA mā te tikanga e whakawhirinaki ana ki te waikawa gibberellic, ka tiakina tonutia ngā pae here InsP₈. Mā ēnei kitenga ka kitea anō hoki te whanaketanga o ngā ara tohu pūtau i roto i te wā.
Kua tāia anōtia tēnei tuhinga mai i ngā puna e whai ake nei. Kia mōhio: Tērā pea ka whakatikahia te roa me te ihirangi o te tuhinga. Mō ētahi atu pārongo, whakapā atu ki te puna. Kei konei tā mātou kaupapa here mō te tuku pānui pāpāho.
Wā tuku: Hepetema-15-2025