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细叶石斛组培快繁技术的优化

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

  • 摘要: 以细叶石斛(Dendrobium hancockii Rolfe)成熟种子为外植体,研究不同激素组合对原球茎途径的增殖、分化以及壮苗生根的影响。结果表明:细叶石斛种子萌发培养50 d即可出现大量饱满绿色的原球茎;增殖、分化阶段最佳培养基为MS培养基+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+琼脂7.8 g·L–1,增殖率为16.67%;生根壮苗最适培养基为MS(Murashige-Skoog)培养基+0.5 mg·L–1 NAA+0.1 mg·L–1吲哚丁酸(indolebutyric acid,IBA),生根率100%,分化系数为6.14,幼苗健壮且生长快速。优化了细叶石斛组培快繁体系,为后续进一步优化以及工厂化生产提供依据。

     

    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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