The iron response element (IRE) is a highly conserved RNA stem loop structure. It is the binding site of iron regulatory protein (IRP).
2
维管形成层向两侧延伸直至形成一个茎内的分生组织环,各个维管束被束间形成层联系在一起。
The vascular cambium extends to form a complete ring of meristematic tissue around the stem, the separate vascular bundles being linked by interfascicular cambium.
The result declares that transmission of VP in willow stem (salix babylonica) plantlet can be evoked by treating the wood with Naclsolution or by a local burn on the stem.