Kutheni izityalo ezitshintshwe imizila yokumelana nezinambuzane zikwazi ukumelana nezinambuzane?Oku kuqala ngokufunyaniswa “kweprotheyini yokumelana nezinambuzane”.Kwiminyaka engaphezu kwe-100 eyadlulayo, kwilitye lokusila kwidolophu encinci yaseThuringia, eJamani, izazinzulu zafumanisa ibhaktheriya enemisebenzi yokubulala izinambuzane kwaye zayithiya igama ledolophu iBacillus thuringiensis.Isizathu sokuba i-Bacillus thuringiensis ikwazi ukubulala izinambuzane kukuba iqulethe "iprotheyini ye-Bt-resistant insect".Le proteni ye-Bt ye-anti-insect igxininise kakhulu kwaye inokubophelela kuphela "kwi-receptors ethile" emathunjini ezinambuzane ezithile (ezifana nezinambuzane ze-"lepidopteran" ezifana ne-moths kunye nama-butterflies), ezibangela ukuba izinambuzane ziqhube kwaye zife.Iiseli zesisu zabantu, imfuyo kunye nezinye izinambuzane (ezingezona "i-Lepidopteran" izinambuzane) azinayo "ii-receptors ezithile" ezibopha le proteni.Emva kokungena kwi-digestive tract, i-protein ye-anti-insect inokugaya kuphela kwaye ithotywe, kwaye ayiyi kusebenza.
Ngenxa yokuba i-protein ye-Bt echasene nezinambuzane ayinabungozi kwindalo, abantu kunye nezilwanyana, i-bio-insecticides kunye nayo njengenxalenye ephambili isetyenziswe ngokukhuselekileyo kwimveliso yezolimo iminyaka engaphezu kwe-80.Ngophuhliso lobuchwepheshe be-transgenic, abalimi bezolimo baye badlulisela i-"Bt-resistant-resistant protein" kwizityalo, okwenza izityalo zikwazi ukumelana nezinambuzane.Iiprotheyini ezikwaziyo ukumelana nezinambuzane ezisebenza kwizinambuzane aziyi kusebenza ebantwini emva kokungena kumgudu wokugaya ukutya komntu.Kuthi, iprotein enganyangekiyo kwizinambuzane iyagaywa kwaye ithotywa ngumzimba womntu njengeprotheni esebisini, iprotein ekwinyama yehagu, kunye neprotein ekwizityalo.Abanye abantu bathi kanye njengetshokholethi, ethathwa njengento etyiwayo ngabantu, kodwa ityhefwe zizinja, izityalo ezikwaziyo ukumelana nezinambuzane eziguquliweyo zithatha ithuba lokwahlukana kweentlobo ezinjalo, okukwangundoqo wenzululwazi.
Ixesha lokuposa: Feb-22-2022