J Integr Plant Biol. ›› 1989, Vol. 31 ›› Issue (9): -.

• Research Articles •    

Embryological Studies on Ginseng (Panax ginseng C.A. Mey.)

Lian Yong-quan and Shen Jia-heng   

Abstract: Embrylogical studies of ginseng were carried out systematically. The main results were as follows: 1. The anther is tetralocular. Meiosis of the microspore mother cells was accompanied by simultaneous cytokinesis, and resulting in tetrahedral tetrad. The mature pollen grains are three-celled type. 2. The megasporocyte undergoes meiosis and gives rise to a linear or a "T" shaped tetrad of megaspore, the chalazal megaspore was functional. The development of female gametophyte was of the Polygonum type. 3. In the same flower, the corresponding developmental stages of the stamen and pistil are observed; and we also related them with the outer flower mophology. 4. The double fertilization of ginseng referred to the type of the premitotic syngamy. About 7–10 hours after pollination, most of the female and male nuclei begin to fuse with each other. 5. The primary endosperm nucleus begins the first mitotic division within 36 hours after pollenation, the resting period of the zygote is about 15–20 days long. The endosperm belonged to the nuclear type. When there are about three hundreds free nuclei cell walls begain to appear thus forming cells in the endosperm.

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