采用活体机械切片，对高粱ＤＮＡ导入水稻鄂宜１０５所获后代，于始穗、齐穗、乳熟３个时期对茎基、穗颈及剑叶中脉维管束进行了解剖观察．发现上述材料的维管束较受体发达，表现在维管束数多，同类维管束横切面积大，尤其是剑叶中脉气腔数目增多，气腔内薄壁组织扯裂时间较早，叶片成熟较受体早 The biomechanical observation of the vascular bundles in midrib of scion, panicle neck and flag leaf was carried out on live spike, full spike and milky-ripened stage. The results showed that the vascular bundles were more developed than those of the recipient. The results showed that the number of vascular bundles was large, the cross-sectional area of ​​the vascular bundles was larger, especially the number of air cavities in the midrib of the flag leaf was increased. More than the receptor