植物病毒是导致粮食、油料、蔬菜、果树、花卉等作物产量下降和品质变劣的重要原因,全世界每年因植物病毒导致的农作物损失在200亿美元左右。自1892年发现第1个植物病毒——烟草花叶病毒以来,目前全世界发现的植物病毒种类已超过900种,而我国只报道了100多种。植物病毒可以导致植物细胞和组织结构发生变化而引起黄化、褪 Plant virus is one of the important reasons for the decline of yield and quality of crops such as grain, oilseeds, vegetables, fruit trees and flowers. The annual loss of crops caused by plant viruses in the world is about 20 billion U.S. dollars. Since the discovery of the first plant virus, Tobacco Mosaic Virus, in 1892, over 900 species of plant viruses have been found in the world at present, while only about 100 species have been reported in China. Plant viruses can cause changes in plant cells and tissue structure caused by yellowing, faded