Ho bonolo ho hlokomoloha se etsahalang ka tlas'a lefatše tšimong ea poone, empa meralo ea metso ea poone e ka phetha karolo ea bohlokoa ho fumaneng metsi le limatlafatsi, e amang mamello ea komello, ts'ebeliso e ntle ea metsi le ts'ebetso e tsitsitseng. Haeba balemi ba ne ba ka khothaletsa metso ea poone hore e hole ka botebo, sejalo se ka khona ho fihlella mehloli ea bohlokoa ho teba mobung.
Mohato oa pele oa ho finyella pakane eo ke ho ithuta liphatsa tsa lefutso tse amehang ho gravitropism, ho hōla ha metso ho latela matla a khoheli. Phuputsong e ncha e hatisitsoeng ho Proceedings of National Academy of Sciences, Bo-rasaense ba Univesithi ea Wisconsin, ka tšebelisano le bafuputsi Univesithing ea Illinois. tsebahatsa liphatsa tsa lefutso tse 'nè ka poone le semela sa mohlala Arabidopsis.
Ha peō e ntseng e mela e fetoleloa ka lehlakoreng la eona, metso e meng e fetoha ka tšohanyetso, e moepa ho ea ho matla a khoheli, ha e meng e fetoha karoloana butle-butle. Bafuputsi ba ile ba sebelisa mekhoa ea pono ea mochine ho bona phapang e poteletseng ea metso ea gravitropism ho lipeo tse likete 'me ba kopanya boitsebiso boo le boitsebiso ba liphatsa tsa lefutso bakeng sa sethopo se seng le se seng. Sephetho se ile sa etsa 'mapa oa maemo a ka bang teng a liphatsa tsa lefutso tsa gravitropism ho genome.
'Mapa o ile oa etsa hore bafuputsi ba fihle sebakeng se nepahetseng ho genome - libaka tsa liphatsa tsa lefutso tse makholo a seng makae - empa ba ne ba ntse ba le hole le ho khetholla liphatsa tsa lefutso tse khethehileng bakeng sa gravitropism. Ka lehlohonolo, ba ne ba e-na le sesebelisoa se neng se ka thusa.
“Kaha re ne re kile ra etsa teko e tšoanang ka semela sa Arabidopsis se amanang le hole, re khonne ho bapisa liphatsa tsa lefutso libakeng tse amehang tsa genome mefuteng ka bobeli. Liteko tse latelang li netefalitse hore na ke liphatsa tsa lefutso tse 'ne tse fetolang gravitropism ea metso. Boitsebiso bo bocha bo ka re thusa ho utloisisa kamoo matla a khoheli a bōpang meralo ea metso ea metso, "ho bolela Edgar Spalding, moprofesa Lefapheng la Botany Univesithing ea Wisconsin le mongoli ea ka sehloohong oa thuto.
Matt Hudson, moprofesa Lefapheng la Saense ea Lijalo Univesithing ea Illinois ebile e le sengoli-'moho le eena oa thuto, oa phaella, "Re ile ra sheba tšobotsi e sa batlisisitsoeng ka har'a poone e bohlokoa ka mabaka a mangata, haholo-holo tabeng ea phetoho ea boemo ba leholimo. . ’Me re ho entse ka ho etsa hore phapang ea ho iphetola ha lintho pakeng tsa limela e re tsoele molemo.”
Poone le Arabidopsis, leloko le lenyane la mosetareta le hlalositsoe ka botlalo ke litsebi tsa baeloji ea limela, li bile teng ka lilemo tse ka bang limilione tse 150 tse fapaneng nalaneng ea ho iphetola ha lintho. Hudson o hlalosa hore le hoja mefuta ena ka bobeli e arolelana mesebetsi ea motheo ea limela, liphatsa tsa lefutso tse li laolang ho ka etsahala hore ebe li ile tsa kopana ka har'a genome ha nako e ntse e ea. Seo se bonahala e le ntho e ntle bakeng sa ho fokotsa liphatsa tsa lefutso tse tloaelehileng.
Mefuteng e amanang haufi-ufi, liphatsa tsa lefutso li atisa ho mela ka tatellano e batlang e tšoana ho genome (mohlala, ABCDEF). Leha liphatsa tsa lefutso tse tšoanang li ka ba teng mefuteng e amanang le hole, tatellano ea liphatsa tsa lefutso sebakeng seo 'mapa oa eona ha e nyallane (mohlala, UGRBZ). Ka mor'a hore bafuputsi ba tsebe moo ba lokelang ho shebahala teng ho genome e 'ngoe le e' ngoe, tatellano ea liphatsa tsa lefutso e fapaneng e ile ea etsa hore liphatsa tsa lefutso tse tloaelehileng (tabeng ena B) li hlahe.
Hudson o re: "Ke ne ke nahana hore ho monate hore re tsebe ho tseba liphatsa tsa lefutso tseo re neng re ke ke ra li fumana ka tsela e fapaneng feela ka ho bapisa linako tsa genomic ho mefuta e sa amaneng ea limela. "Re ne re na le ts'epo ea hore ke liphatsa tsa lefutso tse nepahetseng ha li tsoa tlhahlobisong ena, empa sehlopha sa Spalding se ile sa qeta lilemo tse ling tse supileng kapa tse robeli se fumana lintlha tse tiileng tsa biology ho netefatsa hore li na le karolo ho gravitropism. Ha re se re entse joalo, ke nahana hore re netefalitse mokhoa ona kaofela hore nakong e tlang, o ka sebelisa mokhoa ona bakeng sa mefuta e mengata e fapaneng ea phenotype. ”
Spalding o hlokomela mokhoa ona mohlomong o atlehile haholo hobane litekanyo tse nepahetseng li entsoe sebakeng se le seng.
O re: "Hangata, bafuputsi ba poone ba tla lekanya litšobotsi tsa bona tsa thahasello tšimong, athe bafuputsi ba Arabidopsis ba atisa ho hōlisa limela tsa bona ka likamoreng tsa kholo. "Re ile ra lekanya motso oa gravitropism phenotype ka tsela e laoloang haholo. Lipeo tsena li ne li lengoa ka poleiti ea petri, 'me tlhahlobo e ile ea nka lihora tse seng kae, ho fapana le mekhoa eo u ka e lekanyetsang lefatšeng la sebele le bulehetseng mefuta eohle ea mefuta-futa. "
Esita leha litšobotsi li ka lekanyetsoa tikolohong e tšoanang, ha se litšobotsi tsohle tse etsang hore ho be le batho ba tšoanelehang bakeng sa mokhoa ona. Bafuputsi ba totobatsa litšobotsi tseo ho buuoang ka tsona e lokela ho ba tsa bohlokoa mosebetsing oa motheo oa limela, ho netefatsa hore liphatsa tsa lefutso tsa khale li teng mefuteng e sa amaneng.
"Gravitropism e ka ba ntho e ntle haholo ho ithuta ka mokhoa ona hobane e ka be e bile senotlolo sa tsebo ea mantlha ea letlobo le metso ka mor'a katleho ea naha," Spalding o re.
Hudson o re gravitropism e tla ba senotlolo sa bokolone ba tikoloho e fapaneng, hape.
O re: "NASA e thahasella ho lema lijalo lipolaneteng tse ling kapa sebakeng, 'me ba hloka ho tseba hore na u tla tsoalisa eng ho etsa joalo. "Limela li ferekane haholo ntle le matla a khoheli."
Sengoloa se reng, "Leveraging orthology ka har'a poone le Arabidopsis QTL ho khetholla liphatsa tsa lefutso tse amang phapang ea tlhaho ho gravitropism," e phatlalalitsoe ho Proceedings of National Academy of Sciences [DOI: 10.1073/pnas.2212199119]. Patlisiso ena e tšehelitsoe ka lichelete ke National Science Foundation.
Lefapha la Saense ea Lijalo le Kolecheng ea Temo, Bareki le Saense ea Tikoloho Univesithing ea Illinois Urbana-Champaign.
Mohloli: https://www.sciencedaily.com