Iqela lophando elikhokelwa ngu-RIKEN lifumene ukufunyaniswa okungasetyenziselwa ukuphucula ukufunxa izondlo zezityalo.Umthuthi unxulumene nokuhla kweengcambu zezityalo ngenxa yomxhuzulane.Le nto ibizwa ngokuba yi-root geotropism1.googletag.cmd.push(umsebenzi(){googletag.display('div-gpt-ad-1449240174198-2′);});
UCharles Darwin wayengomnye wezazinzulu zokuqala ukufunda ngokuxhuzula kweengcambu zezityalo.Ngovavanyo olulula kodwa oluncomekayo, uDarwin wangqina ukuba iingcambu zezityalo ziyawuva umxhuzulane, yaye zinokudlulisela imiqondiso kwizihlunu ezikufuphi, ngaloo ndlela zigoba iingcambu kumxhuzulane.Ngoku siyazi ukuba i-hormone yesityalo i-auxin idlala indima ephambili kule mpendulo yomxhuzulane.
Iihomoni zezityalo zinemisebenzi emininzi yezendalo kwaye zinokunceda izityalo zixhathise ukuguquguquka kwendalo.Ukuze zisebenze ngokufanelekileyo, ukuhanjiswa kwazo kunye nomsebenzi kwiiseli kunye nezicubu kufuneka ziyilwe ngokuchanekileyo.Oku kudla ngokubandakanya abathuthi abalamla ukuthathwa kweselula okanye ukuthunyelwa ngaphandle kweehomoni okanye ezandulelayo.
Ngoku, i-RIKEN izazi zebhayoloji ziye zabonisa ukuba umthuthi ochazwe ngaphambili we-NPF7.3 unokulawula impendulo ye-auxin kunye nobunzima beengcambu kwimodeli yesityalo i-Arabidopsis.
UMitsunori Seo weRIKEN Sustainable Resources Science Centre uthe: “Siye saphawula ukuba izithole ezinotshintsho kumzila wemfuza weNPF7.3 zibonisa ukukhula okungaqhelekanga kweengcambu.”“Uphononongo olusondeleyo luveze isiphene esithile kwimpendulo yomxhuzulane, njengoko bekuchaziwe ngaphambili.Umsebenzi we-NPF7.3 njenge-nitrate kunye ne-potassium transporter ayinakuchazwa.Oku kusenza sikrokre ukuba iprotein inokuba neminye imisebenzi ebikade ingaziwa ngaphambili. "
Iimvavanyo ezalandelayo zibonise ukuba i-NPF7.3 isebenza njengomthuthi we-indole-3-butyric acid (IBA), kunye ne-IBA efunnwe ziiseli ezithile zeengcambu nge-NPF7.3 iguqulwa ibe yi-indole-3-acetic acid (IAA), eyiyo engundoqo Umthombo wangaphakathi auxin.Oku kunceda ukuseka i-auxin gradient kwizicubu zeengcambu, ezithi zikhokele impendulo yomxhuzulane.
I-IBA ngumanduleli wesibini we-IAA, kwaye indima ye-IBA-derived IAA kwintshukumo yomxhuzulane yayingaziwa ngaphambili.Nangona kunjalo, kubonakala ngathi ezinye izityalo (kubandakanywa iintlobo zezityalo) nazo zineendlela zokulawula ezifanayo, ezinokuthi zikhokhelele ekusetyenzisweni kwezolimo kunye nezityalo.
USo uthe: "Siza kukwazi ukulungisa inkqubo yeengcambu ngokulawula ukuhanjiswa kwe-IBA.""Oku kuya kuphucula ukufunxwa kwamanzi kunye nezondlo yinkqubo yeengcambu, ngaloo ndlela ikhuthaza imveliso yezityalo."
Iiprotheyini ze-NPF zaye zachongwa njenge-nitrate okanye i-peptide abathuthi, kodwa kuyacaca ukuba ziguquguquka ngakumbi kunokuba bekucingelwa ngaphambili.U-Seo wachaza: "Uphando lwakutsha nje, oluquka olu, lubonise ukuba le ntsapho yezothutho inokuzisa iintlobo ngeentlobo zeekhompawundi, kuquka iihomoni zezityalo kunye neemetabolites zesibini."“Umbuzo omkhulu olandelayo ngowokuba, sifuna ukwazi ukuba iprotein ye-NPF iyibona njani le nto.Ii-substrates ezininzi.
Unokuqiniseka ukuba abahleli bethu baya kubeka iliso elibukhali yonke ingxelo ethunyelweyo kwaye baya kuthatha amanyathelo afanelekileyo.Uluvo lwakho lubaluleke kakhulu kuthi.
Idilesi yakho ye-imeyile isetyenziselwa kuphela ukwazisa umamkeli ukuba ngubani othumele i-imeyile.Idilesi yakho okanye idilesi yomamkeli ayisayi kusetyenziselwa nayiphi na enye injongo.Ulwazi olufakileyo luya kuvela kwi-imeyile yakho, kodwa iPhys.org ayizukugcina nangaluphi na uhlobo.
Fumana uhlaziyo lweveki kunye/okanye lwemihla ngemihla oluthunyelwa kwi-inbox yakho.Ungazikhupha nanini na, kwaye asisoze sabelane ngeenkcukacha zakho namaqela esithathu.
Le webhusayithi isebenzisa iikuki ukunceda ukukhangela, ukuhlalutya ukusebenzisa kwakho iinkonzo zethu kunye nokubonelela ngomxholo ovela kumntu wesithathu.Ngokusebenzisa iwebhusayithi yethu, uyaqinisekisa ukuba uyifundile kwaye wayiqonda imigaqo-nkqubo yethu yabucala kunye nemigaqo yokusetyenziswa.