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Bulletin of Botanical Research ›› 1987, Vol. 7 ›› Issue (1): 155-162.

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Jin Chun-ying, Wang Ting-fen   

  1. Northeastern Forestry, University, Harbin, Heilongjiang
  • Online:1987-03-15 Published:2016-06-13

Abstract: In this paper, the observations on te embryogenesis and the process of distribution of starch were reported. Zygote of Korean pine is located at the middle upper part of the arche-gonium, During cell division, the spindle fibre formed by zygo-tes is at an angle to its major axis. The first mitosis produ-ces two free nuclei and during descending, they mitotically divide for the second time. The four free nuclei produced arrange ina tier. The third mitotic division results in eight free nuclei,arranging into two tiers, and the cell wall is formed. Sixteen cells are formed by the fourth division, and arrange in four tiers, forming aproembryo. After one and half months of growth and development, and the embryo selection stage, in the middle of July, it enters the period of young embryo development. In the first ten days of August, the young embryo already undergoes tissue and organ differentiation. At that Time, the starch gradually moves from the micropyle end to the combining site at the opposite end. Seeds ripen at the end of September.