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題 名 | An Efficient Adventitious Shoot Regeneration System for Ramie (Boehmeria Nivea Gaud) Using Thidiazuron=噻苯隆(Thidiazuron)誘導的苧麻高效不定芽再生體系的建立 |
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作 者 | 汪波; 彭定祥; 劉立軍; 孫珍夏; 張娜; 高世梅; | 書刊名 | Botanical Studies |
卷 期 | 48:2 2007.04[民96.04] |
頁 次 | 頁173-180 |
分類號 | 434.63 |
關鍵詞 | 器官發生; 子葉; 苧麻; Boehmeria nivea gaud; Cotyledon; Organogenesis; Ramie; Thidiazuron; |
語 文 | 英文(English) |
中文摘要 | 以苧麻子葉為外植體,對影響植株再生的因素進行了研究並建立了高效的不定芽再生體系。結果表明:取自發芽後培養4天的實生苗的子葉具有最高的再生頻率。在和噻苯隆(TDZ)搭配使用時,吲哚乙酸(IAA)是IAA、吲哚丁酸(IBA)、奈乙酸(NAA)和2,4-D等四種生長素中效果最好的。不同濃度的TDZ和IAA配合使用獲得了不同的再生頻率,獲得最高再生頻率(86.2%)的培養基為附加2.27 µMTDZ和0.057 µMIAA的MS培養基。不同基因型的再生能力有顯著差別,在6個被測試的品種(材料)中,5041-3的再生頻率最高。再生苗轉移到不含激素的培養基上進行伸長生長,長至2cm左右時轉到含有0.27 µMNAA的1/2MS培養基上生根,生根後的植株有4-5片真葉時移栽到溫室中進一步生長。根據現有的報導,本研究是首次利用苧麻子葉建立高效再生體系,本研究結果將在苧麻的遺傳改良上發揮重要作用。 |
英文摘要 | An efficient culture system for direct adventitious shoot regeneration of plantlet from cotyledon of ramie (Boehmeria nivea Gaud) was established and factors affecting shoot regeneration efficiencies were evaluated. Cotyledons excised from 4-day-old seedlings showed the highest regeneration capacity. Various concentrations of thidiazuron (TDZ) and indoleacetic acid (IAA) gave rise to adventitious shoots with different efficiencies. The cultures of cotyledons from 4-day-old ramie seedlings on MS medium supplemented with 2.27 µM TDZ and 0.057 µM IAA were shown to have the highest efficiency (83.6%) of shoot regeneration among the four auxin supplements (2,4-D; IAA; IBA; NAA). Regeneration of shoot in six cultivars was genotype-dependent, '5041-3' being the most responsive one. The regenerated shoots were transferred to hormone- free medium for shoot elongation, after successfully rooted on half-strength MS medium supplemented with 0.27 µM NAA. The rooted plantlets with 4-5 leaves were transplanted to greenhouse for further growth. To our knowledge, this is the first report on efficient regeneration of plantlet from cotyledon of ramie, which will be of value for genetic improvement in the near future. |
本系統中英文摘要資訊取自各篇刊載內容。