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

2. Many embryogenic calli were produced by subculture of calli induced from mature embryo of rice.

3. Longan embryogenic calli were used as materials for investigating the effects of light quality on the growth and the changes of enzymatic activities of POD, CAT and SOD.

4. Synchronized embryogenic cultures at different developmental stages were obtained by controlling 2,4-D concentration and developmental time.

5. The embryoids were formed from single embryogenic cells, and those cells derived from one embryogenic cell were enclosed in common thickened wall.

6. The main results were described as follows:1)Initial inducing embryogenic callus and globular embryos had super regeneration capacity than other stage embryos.

7. Using embryogenic calli from young embryos as explants, bean chitinase gene was transferred into spring wheat plants by microprojectile bombardment.

8. On the contrary, the non embryogenic callus was loose in texture, rough in surface, watery and white in color.

9. The results indicated that embryogenic callus was the best material for observed chromosome.

10. Embryogenic callus were formed in thesurface of meristematic tissue nodes.

11. Embryogenic suspension cell is ideal material of protoplast culture of gramineous plants.

12. The embryogenic cells were characterized by large nucleus, dense cytoplasm, abundant organelles.

13. The dynamic changes of some biomacromolecules were measured in the process of somatic embryogenesis from embryogenic callus in longan(Dimocarpus longan Lour. ).

14. This paper reprots on the somatic embryogenesis and callus formation from protoplasts isolated from embryogenic cell suspension with high regenerability of wheat(Triticum aestivum L. cv. 35816).

15. The central vacuole began to disappear, and cytoplasm with abundant organelle accumulated starch in some of microspores having embryogenic ability on transfer to culture.

16. The exogenous auxin and cytokinin are necessary to induced differentiation and proliferation of cells of culture in vitro. 2,4-D is an important hormone of induced embryogenic calluses.

17. Prolonged starvation and aging might lead to rejuvenation of embryogenic potential.

18. The high efficiency tissue culture system of Poa pratensis L. was established, through the study on the optimal condition of tissue culture and the impact factors of embryogenic regeneration .

19. The undeveloped ovules in mature fruits of Bingtangcheng(Citrus sinensis) were cultured on five different media to induce embryogenic calli.

20. The results indicated that genotype has remarkable effect on embryogenic callus induction[sentencedict.com], moreover there is interactive relation between genotype and base medium.

21. The present paper analysed two key procedures for rapid establishment of embryogenic cell suspension cultures derived from barley mature embryo.

22. In the paper, some methods of tissue improvement, factors affect embryogenic cell suspension cultures are put forward. Problems existed and view of foreground.

23. The young tassels (1-1.5cm long)of maize cultured in vitro can develop in three ways, budding directly (B) , non-embryogenic or non-morphogenetic callus (SF) , and embryogenic Ellus (E-l) .

24. The results showed that the increase in endogenous ABA contents were closely related to starting and development of embryogenic cell.