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http://dx.doi.org/10.14578/jkfs.2011.100.2.11

The Photoautotrophic Culture System Promotes Photosynthesis and Growth of Somatic Embryo-derived Plantlets of Kalopanax septemlobus  

Park, So-Young (Division of Forest biotechnology, Korea Forest Research Institute)
Moon, Heung-Kyu (Division of Forest biotechnology, Korea Forest Research Institute)
Kim, Yong-Wook (Division of Forest biotechnology, Korea Forest Research Institute)
Publication Information
Journal of Korean Society of Forest Science / v.100, no.2, 2011 , pp. 212-217 More about this Journal
Abstract
A photoautotrophic micropropagation methodology in liquid culture medium has a number of advantages for large-scale propagation of plants. This paper describes an improved system for the mass propagation via somatic embryogenesis of the medicinal plant Kalopanax septemlobus Nakai. Somatic embryo-derived young plantlets of K. septemlobus were cultured either under heterotrophic conditions with sucrose on half-strength MS medium with $30gL^{-1}$ sucrose, under heterotrophic conditions without sucrose, or under photoautotrophic conditions (MS liquid medium without sucrose under forced aeration) for four weeks before transferring the plantlets for acclimatization. Plantlets grown under photoautotrophic conditions had more leaves, higher chlorophyll content, a higher net photosynthetic rate (NPR), and a higher survival rate. The results indicate that the photoautotrophic conditions with a forced ventilation system are effective in enhancing the growth of plantlets and the rate of net photosynthesis. The plantlets grown under photoautotrophic conditions had a high survival rate (92%) upon ex vitro transplantation. Our study shows that autotrophically produced plantlets acclimatize better and sooner upon ex vitro transplantation than conventionally cultured plants.
Keywords
Kalopanax; photoautotrophic culture; acclimatization; photosynthesis;
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