Gulu lofufuza motsogozedwa ndi RIKEN lapeza zomwe zingagwiritsidwe ntchito kukonza kuyamwa kwa michere ya mbewu.Chotengeracho chimagwirizana ndi kutsika kwa mizu ya zomera chifukwa cha mphamvu yokoka.Chodabwitsa ichi chimatchedwa mizu geotropism1.googletag.cmd.push(function(){googletag.display('div-gpt-ad-1449240174198-2′);});
Charles Darwin anali mmodzi mwa asayansi oyambirira kuphunzira za mphamvu yokoka ya mizu ya zomera.Kupyolera mu kuyesa kosavuta koma kochititsa chidwi, Darwin anatsimikizira kuti nsonga za mizu ya zomera zimatha kuzindikira mphamvu yokoka, ndipo zimatha kutumiza zizindikiro ku minofu yomwe ili pafupi, motero imapinda mizu ku mphamvu yokoka.Tsopano tikudziwa kuti hormone ya chomera auxin imagwira ntchito yofunika kwambiri pakuyankha kokoka kumeneku.
Mahomoni a zomera ali ndi ntchito zambiri za thupi ndipo amatha kuthandiza zomera kukana kusinthasintha kwa chilengedwe.Kuti agwire bwino ntchito, kagawidwe kawo ndi ntchito zawo m'maselo ndi minofu ziyenera kupangidwa ndendende.Izi nthawi zambiri zimaphatikizapo zonyamula zomwe zimayimira kutengera kwa ma cell kapena kutumiza kunja kwa mahomoni kapena zoyambira zawo.
Tsopano, akatswiri a zamoyo a RIKEN awonetsa kuti chonyamulira chomwe chafotokozedwa kale NPF7.3 chimatha kuwongolera kuyankha kwa auxin ndi mphamvu yokoka ya mizu mu chomera cha Arabidopsis.
Mitsunori Seo wa ku RIKEN Sustainable Resources Science Center anati: “Tinaona kuti mbande zokhala ndi masinthidwe amtundu wa NPF7.3 zimawonetsa kukula kwa mizu."Kupenda mozama kunawonetsa vuto linalake la mphamvu yokoka, monga momwe tafotokozera kale.Ntchito ya NPF7.3 monga nitrate ndi potaziyamu transporter sangathe kufotokozedwa.Izi zimatipangitsa kukayikira kuti puloteniyi ingakhalenso ndi ntchito zina zomwe sizinali zodziwika kale. "
Kafukufuku wotsatira adawonetsa kuti NPF7.3 imakhala ngati yonyamula indole-3-butyric acid (IBA), ndipo IBA yomwe imatengedwa ndi maselo enaake a mizu kudzera mu NPF7.3 imasinthidwa kukhala indole-3-acetic acid (IAA), yomwe ndi chachikulu chamkati Gwero auxin.Izi zimathandiza kukhazikitsa auxin gradient mumizu, yomwe imatsogolera kuyankha kokoka.
IBA ndi kalambulabwalo wachiwiri wa IAA, ndipo gawo la IBA-derived IAA pamayendedwe okoka silinali lodziwika kale.Komabe, zikuwoneka kuti mbewu zina (kuphatikiza mitundu ya mbewu) zilinso ndi njira zowongolera zofananira, zomwe zingayambitse ntchito zaulimi ndi zamaluwa.
Seo adati: "Titha kusintha kachitidwe ka mizu powongolera kufalitsa kwa IBA."“Izi zithandiza kuyamwa kwa madzi ndi michere m’mizu, motero kumalimbikitsa ulimi wa mbewu.”
Mapuloteni a NPF poyambirira adadziwika kuti ndi onyamula nitrate kapena peptide, koma zikuwonekeratu kuti amatha kusintha kuposa momwe amaganizira kale.Seo anafotokoza kuti: “Kafukufuku waposachedwapa, kuphatikizapo uwu, wasonyeza kuti banja lonyamula katundu limeneli likhoza kutulutsa mankhwala osiyanasiyana, kuphatikizapo mahomoni a zomera ndi ma metabolites ena.”"Funso lalikulu lotsatira ndilakuti, tikufuna kudziwa momwe mapuloteni a NPF amazindikira izi.Ma substrates angapo. ”
Mungakhale otsimikiza kuti akonzi athu adzayang'anitsitsa ndemanga zonse zomwe zatumizidwa ndipo adzachitapo kanthu moyenera.Malingaliro anu ndi ofunika kwambiri kwa ife.
Adilesi yanu ya imelo imagwiritsidwa ntchito kudziwitsa wolandirayo amene watumiza imeloyo.Adilesi yanu kapena adilesi ya wolandila sizigwiritsidwa ntchito pazifukwa zina zilizonse.Zomwe mumalowetsa ziziwoneka mu imelo yanu, koma Phys.org sidzawasunga mwanjira iliyonse.
Pezani zosintha zapamlungu ndi/kapena zatsiku ndi tsiku zomwe zimatumizidwa kubokosi lanu.Mutha kusiya kulembetsa nthawi iliyonse, ndipo sitidzagawana zambiri ndi anthu ena.
Webusaitiyi imagwiritsa ntchito makeke kukuthandizani kuyenda, kusanthula momwe mumagwiritsira ntchito ntchito zathu komanso kupereka zinthu kuchokera kwa anthu ena.Pogwiritsa ntchito tsamba lathu la webusayiti, mumatsimikizira kuti mwawerenga ndikumvetsetsa mfundo zathu zachinsinsi komanso momwe mungagwiritsire ntchito.