學術資源整合系統-相關推薦

 
作者Nittaya Chookoh-Yi Tien- Chiu Chen Chang1;Wei Hsin Hu;Ting En Dai
出版日期201907
著作名稱Micropropagation of Tolumnia orchids through induction of protocorm-like bodies from leaf segments
刊名HORTSCIENCE
54
7
頁數1230–1236
被收錄索引SCI
關鍵字flower stalk culture, leaf culture, protocorm-like body, PLB induction, plant regeneration
摘要A protocol for plant regeneration via direct induction of protocorm-like bodies
(PLBs) from leaf segments of Tolumnia Snow Fairy was developed as a basis for mass production. Ten-month-old, in vitro–grown donor plantlets were obtained by inducing shoots from buds on the flower stalk. Leaf segments harvested from plantlets of different heights and from expanding leaves at different positions were compared, as were two BA concentrations with 0.5 mg·LL1 NAA. The greatest rate of PLB induction (16.7%) was observed when leaf segments taken from 1- to 2-cm height plants were cultured in Murashige and Skoog (MS) basal medium supplemented with 2 mg·LL1 BA and 0.5 mg·LL1 NAA after 16 weeks of culture. When using leaf explants, only inner, expanding leaves cultured on MS basal medium supplemented with 4 mg·LL1 BA and 0.5 mg·LL1 NAA resulted in PLB induction, at an average rate of 25.5 PLBs per explant. After 16 weeks of culture, histological and scanning electron microscopy (SEM) observations revealed that PLBs originated from epidermal cells of leaf explants. PLBs of 1 to £2 mm in diameter continued to proliferate after 4 weeks of culture. These secondary PLBs could be produced from either whole PLBs or the upper side of PLBs. Finally, PLBs were regenerated into plantlets. After’14 months of culture, fully developed plants exhibiting
well-developed roots and shoots were acclimatized. These plants grew well, with 1-year survival rates of nearly 73%, for plants originating as explants taken from 1- to 2-cm tall plants, and of 79%, for plants originating as explants taken from inner leaves. Some mature plants flowered 1 year after transplantation. This study presents a simple system that can provide a large number of PLBs for mass propagation in a short time that can be converted into plants and also used for the new cultivars of Tolumnia orchids.
系統號NO000005276

Aug 16 2018 10:46:44
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