histogen

histogen

1. See histogen theory;

参见histogentheory;

2. In roots, however, the concept is still applied, and in some angiosperm roots a fourth histogen zone is recognized, the calpytrogen, which gives rise to the root cap.

然而在根中，它还是适用的。在一些被子植物的根中，还发现了第四种组织原，即calpytrogen，与根冠发生有关。

3. histogen theory

组织原学说

4. histogen concept

组织原概念