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갯봄맞이(Glaux maritima L.) 실생의 단마디배양을 통한 기내증식
배수지(Su-Ji Bae),강범창(Beum-Chang Kang),정미혜(Mihye Jeong),김수종(Soochong Kim),김창길(Chang Kil Kim),한증술(Jeung-Sul Han) 한국원예학회 2016 원예과학기술지 Vol.34 No.3
This study was conducted to establish an in vitro propagation system for sea-milkwort (Glaux maritima L.), which is an endangered coastal plant species with high horticultural value. Two phenotypes, ‘Red type (RT)’ and ‘Pistachio type (PT)’ based on the colors of stem and flower, were obtained from a personal horticulturist in 2009 and used for this study as plant materials. The stock plants showed typical morphologies in flower, capsule, and seed appearances as previously reported. Low temperature treatment at 4℃ for four or more weeks after in vitro sowing maximized seed germination percentage, indicating that imbibition of seed and subsequent low temperature treatment are crucial for its germination. The in vitro seedlings had phenotypic variation, falling into ‘RT’ and ‘PT’ classes like the stock plants. Although slight differences depending on genotype and medium were recognized, the fourth or fifth nodes detached from the in vitro seedlings revealed the best multiplication efficacy when estimated on the basis of total number of nodes of newly developed axillary shoots. In addition, the nodes from ‘RT’ and ‘PT’ regenerated the most shoots on medium supplemented with 0.5 ㎎·L<SUP>-1</SUP> BA alone and 0.5 ㎎·L<SUP>-1</SUP> BA plus 0.5 ㎎·L<SUP>-1</SUP> IAA, respectively. The node culture-derived plantlets were well acclimatized in a culture room ex vitro and completed the pseudo-annual life cycle coincident with that in the natural salt march habitat with the current cultivation method of applying fresh water-irrigation under an inland environment. This work represents the first report of in vitro propagation of sea-milkwort. Thus, our study will contribute to exo-habitat conservation and natural habitat restoration of this endangered species in addition to development of a horticultural product.
ScienceON
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