【摘要】 对具有不同抗病反应的 3个辣椒品种进行离体叶人工接种辣椒疫霉菌 ,显微镜观察表明 ,辣椒疫霉菌在不同抗病反应品种上 ,其侵入前的过程基本相似 ,都能形成特殊侵染机构—压力胞 ,压力胞球形或长椭圆形 ,并且从气孔侵入叶内 ,在细胞间隙中扩展。然而 ,随着品种抗性增强 ,侵入菌丝扩展缓慢 ,稀疏 ,数量少 ,扩展过程明显受到抑制 ,不易形成孢子囊 ,寄主病变发生时间推迟 ,并且抗病品种上菌落小 ,有早期败育特征更多还原

【Abstract】 Three pepper cultivars with different levels of resistance were inoculated using artificial method with detached leaves.The microscope showed that the processes before invading of P.capsici on different cultivars were similar,for P.capsici could produce special invading structure-appressoria,which invaded the leaves from the stomata and spread among the laps of cells.However,with increasing resistance,not only the invading mycelium were inhibited obviously,the amount of them was fewer,and failed to develop the sporangia,but also the host was infected later,the colonies on the leaves were smaller,which had the tendency to stop growing.更多还原