T\u0259kam\u00fcl biologiyas\u0131nda m\u0259\u015fhur toyuq-yumurta dilemmas\u0131 il\u0259 m\u00fcqayis\u0259 oluna bil\u0259c\u0259k bir sual var: hans\u0131 qabiliyy\u0259t birinci g\u0259ldi: t\u0259n\u0259ff\u00fcs \u00fc\u00e7\u00fcn oksigend\u0259n istifad\u0259 etm\u0259k, yoxsa fotosintez yolu il\u0259 buraxmaq? Bu yax\u0131nlarda t\u0259dqiqat\u00e7\u0131lar uzun m\u00fcdd\u0259tdir davam ed\u0259n bu suala cavab verm\u0259k \u00fc\u00e7\u00fcn a\u00e7ar ola bil\u0259c\u0259k bir molekul k\u0259\u015ff etdil\u0259r. \u018fs\u0259r Proceedings of the National Academy of Sciences (PNAS) jurnal\u0131nda d\u0259rc olunub.<\/p>\n
Aliml\u0259r azot d\u00f6vran\u0131nda i\u015ftirak ed\u0259n bakteriyalar\u0131 t\u0259dqiq ed\u0259rk\u0259n g\u00f6zl\u0259nilm\u0259z bir k\u0259\u015ffl\u0259 qar\u015f\u0131la\u015fd\u0131lar. Onlardan birind\u0259, Nitrospirota, t\u0259dqiqat\u00e7\u0131 Feliks Elling, fotosintez prosesind\u0259 bitkil\u0259rin istifad\u0259 etdiyi molekullar\u0131 daha \u00e7ox xat\u0131rladan bir molekul k\u0259\u015ff etdi.<\/p>\n
S\u00f6hb\u0259t b\u00fct\u00fcn canl\u0131 orqanizml\u0259rin enerji m\u00fcbadil\u0259sind\u0259 i\u015ftirak ed\u0259n universal birl\u0259\u015fm\u0259 olan xinonun bir n\u00f6v\u00fc olan metil plastokinondan gedir. \u018fvv\u0259ll\u0259r, quinonlar\u0131n ya anaerob (oksigen t\u0259l\u0259b etm\u0259y\u0259n) v\u0259 ya aerob oldu\u011funa inan\u0131l\u0131rd\u0131, bunlar “bitki” v\u0259 “heyvan” olaraq b\u00f6l\u00fcn\u00fcr. Yeni molekulun onlar aras\u0131nda ara \u0259laq\u0259 oldu\u011fu ortaya \u00e7\u0131xd\u0131.<\/p>\n
Bu k\u0259\u015ff 2,3-2,4 milyard il \u0259vv\u0259l, siyanobakteriyalar\u0131n k\u00fctl\u0259vi \u015f\u0259kild\u0259 oksigen istehsal etm\u0259y\u0259 ba\u015flad\u0131\u011f\u0131 bir d\u00f6vr olan Oksigen F\u0259lak\u0259ti haqq\u0131nda anlay\u0131\u015f\u0131m\u0131z\u0131 d\u0259yi\u015fir. \u0130ndiy\u0259 q\u0259d\u0259r fotosintezin aerob t\u0259n\u0259ff\u00fcsd\u0259n \u0259vv\u0259l meydana g\u0259ldiyin\u0259 inan\u0131l\u0131rd\u0131. Bununla bel\u0259, yeni tap\u0131nt\u0131 g\u00f6st\u0259rir ki, b\u0259zi bakteriyalar siyanobakteriyalar k\u00fctl\u0259vi \u015f\u0259kild\u0259 oksigeni istehsal etm\u0259y\u0259 ba\u015flamazdan \u0259vv\u0259l d\u0259 oksigend\u0259n istifad\u0259 ed\u0259 bilibl\u0259r.<\/p>\n
“Bu, toyuq v\u0259 yumurtan\u0131n eyni anda yumurtadan \u00e7\u0131xmas\u0131na b\u0259nz\u0259yir” dedi Ellinq.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u0259kam\u00fcl biologiyas\u0131nda m\u0259\u015fhur toyuq-yumurta dilemmas\u0131 il\u0259 m\u00fcqayis\u0259 oluna bil\u0259c\u0259k bir sual var: hans\u0131 qabiliyy\u0259t birinci g\u0259ldi: t\u0259n\u0259ff\u00fcs \u00fc\u00e7\u00fcn oksigend\u0259n istifad\u0259 etm\u0259k, yoxsa fotosintez yolu il\u0259 buraxmaq? Bu yax\u0131nlarda t\u0259dqiqat\u00e7\u0131lar uzun m\u00fcdd\u0259tdir davam ed\u0259n bu suala cavab verm\u0259k \u00fc\u00e7\u00fcn a\u00e7ar ola bil\u0259c\u0259k bir molekul k\u0259\u015ff etdil\u0259r. \u018fs\u0259r Proceedings of the National Academy of Sciences (PNAS) jurnal\u0131nda […]<\/p>\n","protected":false},"author":3,"featured_media":65954,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36,1],"tags":[],"class_list":["post-66345","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-media","category-society"],"yoast_head":"\n