【摘要】 用编码病毒复制酶的基因转化植物能赋予植物对病毒的高度抗病性。利用病毒的复制酶基因已经成功地获得对烟草花叶病毒（ＴＭＶ）、黄瓜花叶病毒（ＣＭＶ）、马铃薯Ｘ病毒（ＰＶＸ）、马铃薯Ｙ病毒（ＰＶＹ）等具有高度抗病性的转基因植物。复制酶基因在ＲＮＡ水平或者蛋白质水平上的表达，干扰了复制酶的正常功能，进而有效地抑制了病毒的复制，从而达到抗病的目的。更多还原

【Abstract】 Transformation of a plant with viral replicase gene can endow it with a high level of resis-tance to the virus. To date,Plants have been made resistant to tobacco mosaic virus cucumber mosaicvirus,potato virus X , potato virus Y etc. It is considered that expression of replicilse gene at RNA leveland /or protein level interferes with normal functioning of viral replicase complexs leading to effectly inhi-bition of viral replication in the cells of these transgenic plants.更多还原