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細葉石斛組培快繁技術的優化

Optimization of tissue culture and rapid propagation technology of Dendrobium hancockii Rolfe

  • 摘要: 以細葉石斛(Dendrobium hancockii Rolfe)成熟種子為外植體👨🏻🙍🏽,研究不同激素組合對原球莖途徑的增殖、分化以及壯苗生根的影響。結果表明:細葉石斛種子萌發培養50 d即可出現大量飽滿綠色的原球莖;增殖、分化階段最佳培養基為MS培養基+1.0 mg·L–1 6-苄氨基嘌呤(6-BA)+0.3 mg·L–1 萘乙酸(NAA)+蔗糖30 g·L–1+瓊脂7.8 g·L–1🧞‍♀️,增殖率為16.67%;生根壯苗最適培養基為MS(Murashige-Skoog)培養基+0.5 mg·L–1 NAA+0.1 mg·L–1吲哚丁酸(indolebutyric acid🦴,IBA)💇🏼‍♀️,生根率100%🙅🏼,分化系數為6.14,幼苗健壯且生長快速。優化了細葉石斛組培快繁體系,為後續進一步優化以及工廠化生產提供依據。

     

    Abstract: Utilizing the mature seeds of Dendrobium hancockii Rolfe as explants, this study investigated the impacts of various hormone combinations on the proliferation, differentiation, and rooting of protocorm-like bodies (PLBs). The results indicated that a large number of plump and green PLBs emerged from the Dendrobium hancockii Rolfe seeds after 50 days of germination cultivation. The optimal medium for proliferation and differentiation was MS(Murashige-Skoog) medium supplemented with +1.0 mg·L–1 6-BA+0.3 mg·L–1 NAA+30 g·L–1 sucrose+7.8 g·L–1 agar, with a proliferation rate of 16.67%. The optimal medium for rooting and seedling growth was MS medium + 0.5 mg·L–1 NAA+0.1 mg·L–1 IBA, with a rooting rate of 100% and a differentiation coefficient of 6.14, resulting in robust seedlings with rapid growth. This study optimized the tissue culture and rapid propagation system of Dendrobium hancockii Rolfe, providing a basis for further optimization and industrial production.

     

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