High efficiency plant production of North American ginseng via somatic embryogenesis from cotyledon explants.
An efficient in vitro protocol for plant production of North American ginseng has been established. The pretreatment of cotyledon explants with 1.0 M sucrose at 4 degrees C resulted in an improvement of embryo quality and, combined with a higher sucrose content (7%) in induction medium, improved the embryogenesis frequency from 40% to 75% and the number of embryos per explant from 10 to 21. The frequency of secondary embryogenesis from somatic embryo-derived tissues cultured on MS medium with 1.0 mg l(-1) 2, 4-D and 1.0 mg l(-1) NAA is up to 90%. Somatic embryos can further develop to maturity on SH medium supplemented with 1% activated charcoal and half of them can germinate. About 85% of the germinated embryos will convert into plants with well-developed taproot systems on 1/2 SH medium with 0.5% activated charcoal. The growth chamber and field establishment rates were 95.6 and 93.7%, respectively. The plants transplanted to growth chambers and field plots appear normal.
Zhou
Sijun
S
Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, 1391 Sandford St., London, ON N5V 4T3, Canada. browndc@agr.gc.ca
Brown
Daniel C W
DC
D018548:Cotyledon / Q000196:embryology*; D003470:Culture Media; D047108:Embryonic Development; D018525:Germination / Q000187:drug effects; D005875:Gibberellins / Q000494:pharmacology; D009656:North America; D005894:Panax / Q000196:embryology* / Q000254:growth & development; D018517:Plant Roots / Q000187:drug effects; D036226:Seedlings / Q000187:drug effects; D012639:Seeds / Q000187:drug effects; D013395:Sucrose / Q000494:pharmacology; D046509:Tissue Culture Techniques
D003470:Culture Media; D005875:Gibberellins; D013395:Sucrose; C007842:gibberellic acid