选用离体筛选的抗白叶枯病水稻体细胞无性变异系后代植株的种子 ,收获后播种。对其功能叶用白叶枯病菌菌株浙 1 73剪叶接种 72 h后 ,对叶片进行扫描电镜观察。结果发现 ,筛选的抗性品种的水孔周围病菌较少 ,而感病品种的水孔周围病菌则分布较多。证明了白叶枯病菌的侵染途径首先是通过水孔进入植物叶片内部的 ;另外也证明了筛选的水稻体细胞无性变异系后代植株已具有成株抗性 The seed of the progeny of the offspring of the somaclonal variation of rice bacterial blight resistant to bacterial leaf blight was selected and sown after sowing. Leaf functional fragments were stained with Xanthomonas oryzae strain Zhe 1 73 for 72 h and the leaves were observed by scanning electron microscopy. The results showed that there were less germs around the water hole of the resistant varieties and more pathogens around the water holes of the susceptible varieties. It was proved that the pathogen of Xanthomonas oryzae could penetrate into the leaves of the plant through the water hole first. In addition, it was also proved that the offspring plants of the selected somaclonal variation of somatic plants had the plant resistance