Lev-Yadun Simcha, Aloni Roni
Department of Botany, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
New Phytol. 1993 Jun;124(2):339-344. doi: 10.1111/j.1469-8137.1993.tb03824.x.
The axial and radial derivatives of the cambium showed contrasting wound responses in Melia azedarach L. The vascular rays became larger, less spaced, and their shapes were modified following wounding. As the wound effects vanished with time, ray size, spacing and shape returned to normal patterns. On the other hand, following wounding, vessels became smaller, and fibres were not formed. Vessels returned to normal size, and vessels and fibres reverted to their normal pattern when wound effects vanished. These changes in the patterns of vascular rays, vessels and fibres reflect the nature of the regulatory mechanisms of their formation: axial signal flows, and the involvement of wound effects.
楝树形成层的轴向和径向衍生物表现出相反的创伤反应。受伤后，维管射线变得更大、间距更小，其形状也发生了改变。随着创伤影响随时间消失，射线大小、间距和形状恢复到正常模式。另一方面，受伤后，导管变小，且不形成纤维。当创伤影响消失时，导管恢复到正常大小，导管和纤维也恢复到正常模式。维管射线、导管和纤维模式的这些变化反映了它们形成的调节机制的本质：轴向信号流动以及创伤影响的参与。
