Kungani izitshalo ezishintshwe izakhi ezimelana nezinambuzane zimelana nezinambuzane?Lokhu kuqala ngokutholakala “kwesakhi sofuzo samaprotheni amelana nezinambuzane”.Eminyakeni engaphezu kweyi-100 edlule, endaweni yokugaya edolobheni elincane laseThuringia, eJalimane, ososayensi bathola igciwane elibulala izinambuzane futhi baliqamba ngokuthi i-Bacillus thuringiensis ngegama ledolobha.Isizathu sokuthi kungani i-Bacillus thuringiensis ingabulala izinambuzane kungenxa yokuthi iqukethe “iphrotheni emelana nezinambuzane ze-Bt” ekhethekile.Le phrotheni ye-Bt elwa nezinambuzane icacile kakhulu futhi ingabophezela kuphela "kuma-receptors athile" emathunjini ezinambuzane ezithile (njengezinambuzane "ze-lepidopteran" ezifana namabhu nama-butterflies), okwenza izinambuzane zibhoboze futhi zife.Amangqamuzana okugaya emathunjini abantu, imfuyo nezinye izinambuzane (izinambuzane ezingezona ze-"Lepidopteran") azinawo "ama-receptors athile" abopha le phrotheni.Ngemva kokungena emgudwini wokugaya ukudla, iphrotheni elwa nezinambuzane ingagaywa kuphela futhi yonakaliswe, futhi ngeke isebenze.
Ngenxa yokuthi amaprotheni e-Bt anti-insect ayinabungozi emvelweni, kubantu nasezilwaneni, ama-bio-insecticides nawo njengengxenye eyinhloko asetshenziswe ngokuphepha ekukhiqizeni kwezolimo iminyaka engaphezu kwengu-80.Ngokuthuthuka kobuchwepheshe be-transgenic, abalimi bezolimo baye badlulisela isakhi sofuzo “se-Bt-resistant insect-resistant” ezitshalweni, okwenza izitshalo nazo zimelane nezinambuzane.Amaprotheni amelana nezinambuzane asebenza ezinambuzaneni ngeke asebenze kubantu ngemva kokungena emgudwini wokugaya ukudla komuntu.Kithina, amaprotheni amelana nezinambuzane ayagaywa futhi wonakaliswe umzimba womuntu njengeprotheni etholakala obisini, amaprotheni engulube, kanye namaprotheni asezitshalweni.Abanye abantu bathi njengoshokoledi, abantu abawubheka njengowubiliboco, kodwa ofakwe ubuthi yizinja, izitshalo eziguquliwe ezimelana nezinambuzane zisizakala ngokuhlukana kwezinhlobo ezinjalo, okuwumgogodla wesayensi.
Isikhathi sokuthumela: Feb-22-2022