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美国农业部农业研究局研究的可使植物在受昆虫食害时更强、更快地启动防御作用的改良基因取得了专利。农研局现寻求产业界伙伴进行合作研究,以便最终使农民获益。带此改良基因的番茄和烟草植株制造大量细胞分裂素(一种多功能植物激素)。典型的抗虫基因工程方法是向植物中导入可使之产生大量杀虫蛋白的基因。而利用细胞分裂素的方法则更近似地模拟了植物的天然防御反应。改良的细胞分裂素基因在新的马铃薯创伤诱导性启动子调控下,可使植物仅在遭受食害或创伤时额外产生该种激素。研究人员正在研究将此基因导入甜菜、大豆和草莓,使其发挥效能。
The US Department of Agriculture Agricultural Research Agency has patented a modified gene that allows plants to start defenses more and more quickly when harbored by insects. Agriculture, Forestry and Fisheries Bureau now seeks partners from industry to conduct cooperative research so as to ultimately benefit peasants. Tomato and tobacco plants with this improved gene produce large amounts of cytokinins, a multifunctional plant hormone. A typical insect-resistant genetic engineering approach is to introduce into plants plants that produce large quantities of insecticidal proteins. The use of cytokinin method more closely mimics the plant’s natural defensive response. The improved cytokinin gene, regulated by a new potato traumatic inducible promoter, allows plants to additionally produce this hormone only when they are eaten or traumatized. Researchers are studying the introduction of this gene into beets, soybeans and strawberries to make them work.