GLOBULAR CALLUS INDUCTION, MULTIPLICATION AND PLANT REGENERATION OF DAVALLIA MARIESII MOORE EX BAK.
| Autor: | Kai-Ping Wang, 王凱平 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 Davallia mariesii Moore ex Bak. is a medicinal, perennial fern. A rapid propagation protocol of Davallia mariesii has been established in this study. For callus induction, 0.1 g prothallus explants were cultured in 1/2 MS liquid medium supplemented with 2 % sucrose and subcultured in the same medium every month. Numbers of green callus was proliferated and the best growth ratio was 2.5 times after 2 months. Globular callus was formed from green callus in a diameter around 0.15 cm subcultured in the same medium every 2 weeks for 3 months. For sporophyte induction, globular callus in an average diameter of about 0.21 cm were cultured in 1/2 MS liquid medium supplemented with 2 % sucrose and 1 mg l-1 2ip (2-isopentenyl adenine). Sporophytes were regenerated and the percentage of induction rate was 100% after 2 months. The average number of regenerated sporophytes was about 35 per globular callus. The survival rate of sporophytes was about 70 % after acclimatization for 45 days. It is estimated that 1 g of prothallus explants as a starting inoculum can propagate more than 22,280 plants after one year. Regenerated sporophytes were diploid after chromosome examination. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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