Lev-Yadun Simcha
Department of Plant Genetics, Weizmann Institute of Science, Rehovot 76100, Israel.
New Phytol. 1994 Mar;126(3):499-504. doi: 10.1111/j.1469-8137.1994.tb04247.x.
Wounding or partial girdling leaving only a narrow cambial bridge resulted in changes in the xylem structure in stems and branches of Ficus sycomorus. Wounding inhihiitd the formation of fibre bands, induced tyiosis and differentiation of narrow vessels, and resulted in partially differentiated tissues. Partial girdling of mature trunks resulted in the formation of either a strip of traumatic xylem or a parenchymal strip in which all axial components failed to differentiate but the radial system was not affected and the rays continued to form. The differentiation of rays without an axial system is indicative of the autonomy of the radial signal system that participates in the regulation of ray formation.
创伤或部分环剥仅留下狭窄的形成层桥，导致埃及榕茎和枝条的木质部结构发生变化。创伤抑制了纤维带的形成，诱导了狭窄导管的拟侵填体形成和分化，并导致部分组织分化。成熟树干的部分环剥导致形成一条创伤木质部带或一条薄壁组织带，其中所有轴向成分均未分化，但径向系统未受影响，射线继续形成。没有轴向系统时射线的分化表明参与射线形成调节的径向信号系统具有自主性。
