Bishiyoyin Gingko suna rayuwa na dubban shekaru ta hanyar haɓaka hanyoyin ramawa don kiyaye daidaito tsakanin girma da tsufa.
Ginkgo biloba, bishiyar gymnosperm mai ɗanɗano ɗan asalin ƙasar Sin an san ta da ƙarin lafiyar jiki da kuma maganin ganye.
Hakanan an san shi da rayuwa mai tsayi sosai.
Wasu daga cikin Ginkgo bishiyoyi a China da Japan sun fi shekaru dubu. Ginkgo an ce burbushin halittu ne. Ita ce kawai nau'in rayayyun halittu waɗanda zasu iya rayuwa sama da shekaru 1000 suna ƙin tsufa, mafi girman mallakar halittu masu rai. Don haka, wani lokaci ana maganar Gingko yana kusa da marar mutuwa.
Ilimin kimiyya a baya longevity daga cikin irin waɗannan tsoffin bishiyoyi sun kasance masu ban sha'awa ga ƙwararrun masu bincike na tsawon rai. Ɗaya daga cikin irin wannan rukuni, bayan binciken canje-canje masu dangantaka da shekaru a cikin cambium na jijiyoyin jini daga 15 zuwa 667 bishiyoyi Ginkgo biloba, sun buga binciken su kwanan nan a kan Janairu 13, 2020 a PNAS.
A cikin tsire-tsire, raguwar ayyukan meristem (kwayoyin da ba su da bambanci waɗanda ke haifar da nama) suna haɗuwa da tsufa. A cikin manyan shuke-shuke kamar Gingko, aikin meristem a cikin cambium na jijiyoyin jini (babban nama mai girma a cikin mai tushe) shine mayar da hankali.
Wannan rukuni ya yi nazarin bambancin kaddarorin cambium na jijiyoyin jini a cikin manya da tsofaffin bishiyoyin Gingko a matakan cytological, physiological, da kwayoyin. Sun gano cewa tsofaffin bishiyoyi sun samo asali hanyoyin ramawa don kiyaye daidaito tsakanin girma da tsufa.
Hanyoyin sun haɗa da ci gaba da rarrabuwar tantanin halitta a cikin cambium na jijiyoyin jini, babban bayyanar da ƙwayoyin da ke da alaƙa da juriya, da kuma ci gaba da ƙarfin roba na metabolites na biyu da aka riga aka tsara. Wannan binciken ya ba da haske kan yadda irin waɗannan tsoffin bishiyoyi ke ci gaba da girma ta waɗannan hanyoyin.
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Source (s)
Wang Li et al., 2020. Nazari da yawa na ƙwayoyin cambial na jijiyoyi suna bayyana hanyoyin dawwama a cikin tsoffin bishiyoyin Ginkgo biloba. An fara buga PNAS a ranar 13 ga Janairu, 2020. DOI: https://doi.org/10.1073/pnas.1916548117
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