Vikela futhi ukhule: Iqhinga lokutshala ukudla okwengeziwe

Ukukhula kwesibalo sabantu akuwona umdlalo. Ngokusho kukaBill Gates, inani labantu emhlabeni wonke kulindeleke ukuthi lifinyelele ezigidini eziyisi-9 ngonyaka ka-2050. Ukuze uqhubeke nokuphakela abantu abayizigidi eziyizinkulungwane ezingu-9, ukukhiqizwa kokudla kuzodinga ukwanda ngo-70-100%. Abalimi sebevele batshala izitshalo zabo ngokuminyene ukuze bakhiqize ukudla okwengeziwe, kodwa izitshalo ezitshalwe ngokuminyene zisakhanga izinkinga. 

Kufanele Ukhule Nini, Uvikelwe Nini 

Izitshalo zinenani elilinganiselwe lamandla okufanele zisetshenziswe ngesikhathi esisodwa; zingakhula noma zizivikele, kodwa azikwazi ukukwenza kokubili ngesikhathi esisodwa. Ezimweni ezifanele, isitshalo sizokhula ngesilinganiso esifanele; kodwa, lapho zicindezelwa isomiso, izifo noma izinambuzane, izitshalo zisabela ngokuzivikela, zinciphisa noma zimise ukukhula ngokuphelele. Uma zidinga ukukhula ngokushesha njengokuthi njengalapho ziqhudelana nezitshalo ezingomakhelwane zokuthola ukukhanya (impendulo yokugwema umthunzi), ziyeka ukuzivikela ukuze zisebenzise wonke amandla azo ekukhiqizeni ukukhula. Nokho, ngisho noma zikhula ngokushesha, izitshalo ezitshalwe ngokuminyene ziba sengozini yezinambuzane. 
 

Ithimba labacwaningi e Michigan State University isanda kuthola indlela yokuhwebelana ngokuvikela ukukhula. Okusanda kushicilelwa ku Nature nokuxhumana, ithimba lichaza ukuthi singashintshwa kanjani ngofuzo isitshalo ukuze siqhubeke sikhula kuyilapho sizivikela emandleni angaphandle. Ithimba lososayensi lifunde ukuthi i-repressor yesitshalo yokuvikela i-hormone kanye ne-light receptor ingase ibambeke emzileni wokuphendula wesitshalo. 
 

Ithimba labacwaningi lisebenze nesitshalo se-Arabidopsis (okufana nesinaphi), kodwa indlela yaso ingasetshenziswa kuzo zonke izitshalo. USolwazi Gregg Howe, isazi samakhemikhali ezinto eziphilayo kanye nesazi sebhayoloji yamangqamuzana ne-MSU Foundation, wahola ucwaningo futhi wachaza ukuthi “ama-hormone kanye nezindlela zokusabela ezilula [ezilungisiwe] zikuzo zonke izitshalo ezinkulu.”