论文部分内容阅读
利用扫描电子显微镜对被甘薯糠腐茎线虫（ＤｉｔｙｌｅｎｃｈｕｓｄｅｓｔｒｕｃｔｏｒＴｈｏｒｎｅ）侵染的甘薯组织细胞的损伤情况进行了观察。结果表明，与健康甘薯相比，轻－中度侵染的病薯细胞失水，皱缩，细胞间隙加大，淀粉粒颗粒变小，大部分细胞出现变形等病理变化，同时可见许多正在侵染的线虫；患病严重的薯块内细胞严重失水、皱缩，细胞间呈现大的空隙，维管组织变形，有的破碎，细胞内淀粉粒数量明显减少甚至完全丢失，侵染的线虫数量也明显减少，证实了甘薯茎线虫的活体寄生性及迁移性。
The damage of sweet potato tissue cells infected with Ditylenchus destructor Thorne was observed by scanning electron microscopy. The results showed that, compared with healthy sweet potato, the light-moderate infected sweet potato cells lost water and shrunk, the cell gap increased, the starch granules became smaller, most of the cells showed pathological changes, and many of them were invaded Infected nematodes; seriously diseased tubers within the cells of a serious water loss, shrinkage, showing large gaps between cells, vascular tissue deformation, and some broken, significantly reduced the number of intracellular starch particles or even completely lost, infected nematodes The number also significantly reduced, confirmed the sweet potato stem nematode parasitic and migratory.