营养器官间维管组织的联系_图文.ppt
一、营养器官间维管组织的联系
㈡茎与根之间维管组织的联系The connection between stem vascular tissue with root vascular tissue each other2、基本组织系统和维管系统Ground tissue system and vascular system ⑴在初生生长阶段由根至茎的变化： cortex皮层：厚→薄pith髓：不存在→存在vascular cylinder:维管柱：“实心”(无髓)所占比例小→“空心”比例大
The Connection between vascular tissues of vegetative organ each other
一、营养器官间维管组织的联系
㈡茎与根之间维管组织的联系The connection between stem vascular tissue with root vascular tissue each other2、基本组织系统和维管系统Ground tissue system and vascular system ...