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辟谣丨中关于转基因的十大谣言真相发布!

2017-08-03 11:23:18   央视新闻

谣言八:抗虫转基因作物虫子吃了会死,对人体同样有害

真相:抗虫转基因作物对人无害。

抗虫转基因作物中的Bt蛋白是一种高度专一的杀虫蛋白,只能与棉铃虫等鳞翅目害虫肠道上皮细胞的特异性受体结合,引起肠穿孔,导致害虫死亡,而其他昆虫、哺乳动物和人类肠道细胞没有Bt蛋白的结合位点,因此不会对其他昆虫和哺乳动物造成伤害,更不会影响到人类健康。

另外,人类发现Bt蛋白已有100年,Bt制剂作为生物杀虫剂的安全使用记录已有70多年,至今没有Bt制剂引起过敏反应的报告。

谣言九:转基因作物不增产,对生产没有任何作用

真相:转基因农作物的增产效果是客观存在的。

现阶段广泛商业化种植的转基因作物并不以增产为直接目的,有着更高产量和其他更优良特性的转基因作物,是下一代转基因作物研发的方向。

农业上的增产与否受多种因素影响,转基因抗虫、抗除草剂品种能减少害虫和杂草危害,减少产量损失,加快了少耕、免耕栽培技术的推广,实际起到了增产的效果。如巴西、阿根廷等国种植转基因大豆后产量大幅度提高;南非推广种植转基因抗虫玉米后,单产提高了一倍,由玉米进口国变成了出口国;印度引进转基因抗虫棉后,也由棉花进口国变成了出口国。

谣言十:种植转基因抗除草剂作物会产生“超级杂草”

真相:转基因抗除草剂作物不会成为无法控制的“超级杂草”。

1995年在加拿大的油菜地里发现了个别油菜植株可以抗1-3种除草剂,因而有人称它为“超级杂草”。事实上,这种油菜在喷施另一种除草剂2,4-D后即可全部杀死。其实,“超级杂草”只是一个形象化的比喻,目前并没有证据证明“超级杂草”的存在。

责任编辑:马丽丽 CL0938
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