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1.新型除草剂最近,美国研究成功一种新型除草剂,这种除草剂喷洒到野草等植物表面,能使植物的合成通道发生亢进,从而导致野草迅速死亡,但对大麦、小麦和燕麦等庄稼都毫无影响。据报道,这种除草剂会有选择地破坏植物的细胞,杀死藜、芥和红根苋之类的野草。2.生物工程番茄最近,美国培育出一种生物工程番茄,其主要特点是味道鲜美,长在植株上不变软、不破损,长期存放不腐烂。一般番茄在成熟时会形成一种催熟荷尔蒙—乙烯。为了防止腐烂,往往在番茄绿色、坚硬时,即乙烯形成前进行采摘。生物工程番茄利用基因重组技术,抑制乙烯的产生,所以没有催熟作
1. New herbicides Recently, the United States successfully researches a new type of herbicide, which is sprayed onto the surface of weeds and other plants to exacerbate the pathways of plant synthesis, resulting in the rapid death of weeds. However, for barley, wheat and oats All crops have no effect. It has been reported that this herbicide selectively disrupts plant cells and kills weeds such as quinoa, mustard and red amaranth. 2. Bioengineered Tomato Recently, the United States has cultivated a bioengineered tomato whose main characteristic is its delicious taste. It grows soft on the plant, does not break, and does not decay for long-term storage. In general, ripe tomatoes will form a kind of ripening hormone - ethylene. In order to prevent decay, often in tomato green, hardened, that is, before the formation of ethylene picking. Bioengineering tomato gene recombination technology, inhibit the production of ethylene, so there is no ripening