香蕉族矮病害的病原研究

Studies on the Pathogen of Banana Rosette Dwarf Disease

本文首次报道一种症状类似香蕉束顶病的发病初期的病株中的类菌原体样的病原体通过超薄切片的电镜观察,于叶片韧皮部组织,筛管及伴胞细胞内发现多型性类菌原体,从电镜照片中测得菌体大小约为78～323nm,菌体细胞质膜厚度约为8～12nm,内含物中具核酸样物质。在健株叶片组织中未观察到任何病原体。病株经注射盐酸四环素后,病状逐渐好转,恢复正常生长,大约可保持2～3个月左右。

We colleted twenty-two primary disease plants of Banana bunchy top-like from the dongguan city andPanyu county, Kwangtung province in April-May 1988. With electron microscope examined the phloen tissuesof the leaf vein of these, the MLO was found in the sieve tube and companion and parenchyma cells. It waspolymorphis and spherical or oval in shape. It's diameter ranged from 78-323nm and trilamiar unit membranewas 8-12nm thick. It was clear the nuclearstands inside the organism. It was never found in eight healthy plants. When the diseased plants of Banana were injected with tetracycline-HCL (0.50-1.00million units perplant), the diseased symptoms disappeared slowly after 10-15 days. It recovered normal growth and remainedfor 2-3 months.