Aphids can't stomach super-tobacco leaves

时间:2019-03-07 08:13:07166网络整理admin

By Andy Coghlan BY BLOCKING production of a natural chemical, genetic engineers have created tobacco plants that are super-resistant to aphids. A related approach could one day persuade plants to produce valuable compounds such as fragrances and drugs, the researchers say. Many flowering plants have tiny glands called trichomes that secrete substances onto leaf surfaces. George Wagner and his colleagues at the University of Kentucky in Lexington tinkered with an enzyme in tobacco trichomes that completes the production of an aphid-repelling substance called cembratriene-diol. Strangely, the diterpene precursor from which this repellent is made is even more potent,