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1. Proembryo development is of the Capsella-variation of Onagrad type.

2. Proembryo absorbed nutrition in corrosion cavity and grew, developed.

3. Ootid divided spontaneously into 2 and 4 cell proembryo and multicell globular proembryo. In the end it developed into apomixis embryo.

4. The embryo developed from proembryo , heart-shaped embryo, dicotyledenous to mature embryo.

5. According to the processing of proembryo price is divided into three different grades.

6. When they were divided again, proembryo containing 16 cells was formed.

7. The embryo development went through three stages: proembryo, embryo differentiation and embryo maturation,(sentencedict.com/proembryo.html) and the endosperm experienced a free nuclear stage.

8. Zygotes in the prophase of mitosis and two-celled proembryo became active again in metabolism, for a prominent nucleolus, high density of ribosomes and increased number of polysomes in the cytoplasm.

9. Proembryo A young plant after fertilization but before differentiation into embryo and suspensor tissue.

10. At the late proembryo stage, the cells in the top part of the camp column were gradually deformed and degenerated.

11. During early proembryo stage, the dorsiventrality appears in the proper of the embryo. On the ventral side, the cells are small with dense cytoplasm and few vacuoles.

12. The multicellular proembryo and globular embryo possessed uniserial or untidy disposal multi - cellular suspensor.

13. The proembryo from zygotic cell divisions may be divided into three parts: proper , hypoblast and suspensor.

14. Then embryogenic cell divided into two cells, which sequentially differentiated through multicell proembryo, globular, heart-shaped and cotyledonary embryo stages.

15. In succession, cell layer of suspensor rapidly grew, elongated and down proembryo was carried away cell wall of archegonial base, then get into corrosion cavity in endosperm.

16. Conclusion GA3 and Z can promote germination of American ginseng seed, but cannot ignite the development of proembryo.

17. There are 5 stages during the development of embryo, including the stage of 2 celled proembryo, multicellular proembryo, globular proembryo, pyriform proembryo, differential embryo and mature embryo.

18. The hybrid embryo with disintegrated suspensor cells aborted from the proembryo stage to the torpedo-shaped stage.

19. Dormant stage of the zygote is about 15 days long, and then divided into a two-cell proembryo.

20. Enzymic protein content decreases from the maximum at early phase of proembryo stage (20.83%) to the minimum at young embryo (4.9%).

21. The somatic embryos developed directly into plantlets with roots and buds through multicellular proembryo, globular, heart -shaped, torpedo - shaped and cotyledon stages.