黄瓜花叶病毒的侵染扩散及病变细胞的电镜观察

在电镜下观察黄瓜黄叶病毒的侵染扩散部位发现：病毒粒体入侵细胞及复掣一子 体的扩散同烟草花叶病毒一样是以整体形式向细胞壁靠拢，附着，并通过胞间连丝进入易感细胞，同时还发现少量病毒粒体似有直接穿过胞壁入胞的现象。

OBSERVATION ON THE INVASION AND DIFFUSION OF CMV PARTICLES AND PATHOLOGIC CHANGES OF CELLS UNDER THE ELECTRON MICROSCOPE

In the light of infected position,like TMV the ways of the invasion of CMV particles and diffusion of their filial generation were that the particles approached and attached to the cell walls as the whole form,then entered the sensitive cell through the plasmodesma, whereas a small number of the particles penetrated cells directly.After the invasion of the particles,except that pathogenic spots took place in outward apearance the ultrastructure of the infected cells,especially the ultrastructure of the chloroplast changed very much,i.e.,the incompleteness of the chloroplast membrana externa;the looseness of the grana;the swell and disintegration of some chloroplast and a grant deal of the golgi vesicle appearing in the cytoplasm and so on.