Karyological Studies in Magnolia, with Special Reference to the Cytokinesis in Pollen
1937 年 51 巻 606 号 p. 539-546
詳細
1937 年 51 巻 606 号 p. 539-546
1. In the genus Magnolia there is a polyploid series from diploid to hexaploid, the triploid being yet unknown, and the basic number of chromosomes being 19.
2. M. purpurascens is a pentaploid plant, but not tetraploid as in the case with M. Soulangeana which is an artificially raised interspecific hybrid between M. denudata and M. liliflora. The sporophyte chromosome number (95) in M. purpurascens is the sum of the gametophyte number of the supposed parent plants, our denudata (57) and liliflora (38). These faets support MAKINO'S view based on the external morphological characters of the plants.
3. Existence of a tetraploid M. denudata in nature is suggested.
4. The “furrowing” is not the primary cause of the cytokinesis as was maintained by FARR, but follows the MLI formation.
