DEVELOPMENTAL AND MORPHOLOGICAL STUDIES OF THE SUSPENSOR AND COLEORHIZAE IN SOME TAXA OF THE SUBFAMILY MIMOSOIDEAE (FABACEAE)

摘要

The embryo development of Mimosa pudica and the seedling development of Acacia farnesiana, Albizzia julibrissin,Leucaena glauca and Mimosa pudica were studied by wax method in this paper. The results showed that M. pudica has asuspensor composed of about ten cells which degenerate and integrate into the embryo proper during the cotyledonsdevelopment. The coleorhiza in M. pudica is from the residual suspensor cells and the cells produced by periclinal andanticlinal divisions of the meristematic cells in the embryo development. The coleorhiza in the four studied taxa is broken bythe elongation of the primary root, withdraws and finally falls off during the seedling development.