Sei zvirimwa zvisingapindirwe nezvipembenene zvakagadziriswa majini zvichiramba zvipembenene? Izvi zvinotanga nekuwanikwa kwe "gene reprotein risingapindirwe nezvipembenene". Makore anopfuura zana apfuura, mugayo muguta diki reThuringia, Germany, masayendisiti akawana bhakitiriya rine mabasa ekuuraya zvipembenene ndokuritumidza kuti Bacillus thuringiensis zita reguta. Chikonzero nei Bacillus thuringiensis ichigona kuuraya zvipembenene ndechekuti ine "protein inodzivirira zvipembenene yeBt". Iyi protein yeBt inodzivirira zvipembenene yakanyatsojeka uye inogona kungobatana ne "mareceptor chaiwo" mudumbu rezvipembenene zvimwe (zvakadai se "lepidopteran" zvipembenene zvakaita semamota nemapuruguru), zvichiita kuti zvipembenene zviboore uye zvife. Masero emudumbu evanhu, zvipfuwo nezvimwe zvipembenene (zvipembenene zvisiri "Lepidopteran") hazvina "mareceptor chaiwo" anosunga puroteni iyi. Mushure mekupinda mudumbu, puroteni inodzivirira zvipembenene inogona kungogayiwa nekuora, uye haishande.
Nekuti mapuroteni eBt anorwisa zvipembenene haana njodzi kunharaunda, vanhu nemhuka, mishonga yezvipembenene ine bio-insecticide pamwe chete nayo sechikamu chikuru yave ichishandiswa zvakachengeteka mukurima kwemakore anopfuura makumi masere. Nekuvandudzwa kwetekinoroji ye transgenic, vapfuyi vezvirimwa vakatamisa gene re "Bt zvipembenene-resistant protein" muzvirimwa, zvichiita kuti zvirimwa zvisabatwawo nezvipembenene. Mapuroteni anodzivirira zvipembenene anoshanda pazvipembenene haazoshande pavanhu mushure mekupinda mudumbu remunhu. Kune isu, mapuroteni anodzivirira zvipembenene anogayiwa uye anoparadzwa nemuviri wemunhu sepuroteni iri mumukaka, mapuroteni ari munguruve, uye mapuroteni ari muzvirimwa. Vamwe vanhu vanoti kungofanana nechokoreti, iyo inoonekwa sechikafu chinonaka nevanhu, asi inocheneswa nembwa, zvirimwa zvinodzivirira zvipembenene zvakagadziriswa majini zvinoshandisa mukana wekusiyana kwemarudzi akadaro, iyo iriwo musimboti wesainzi.
Nguva yekutumira: Kukadzi-22-2022