A rapid shoot regeneration protocol from the cotyledons of hemp (Cannabis sativa L.)

文献类型： 外文期刊

第一作者： Cheng Chaohua

作者： Cheng Chaohua;Zang Gonggu;Zhao Lining;Gao Chunsheng;Tang Qing;Chen Jianhua;Su Jianguang;Guo Xinbo;Cheng Chaohua;Peng Dingxiang

作者机构：

关键词： Cannabis sativa;Hemp;Cotyledons;Plant regeneration;TDZ

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.645； 五年影响因子：5.749 ）

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收录情况： SCI

摘要： Hemp (Cannabis sativa) is an annual multipurpose crop that is distributed worldwide. An efficient regeneration protocol is needed for hemp genetic transformation, micropropagation, and germplasm conservation. We describe here a rapid protocol for in vitro shoot regeneration that uses cotyledons as explants. We concluded that TDZ in MS medium is more efficient in inducing in vitro shoots from cotyledons than BA and ZT. The best result, 51.7% induction frequency and 3.0 shoots per shoot explant, was recorded in MS medium containing 0.4 mgl(-1) TDZ and 0.2 mg l(-1) NAA (T4N2). The in vitro shoots grew to the height of 1.5-2 cm in 3-4 weeks after culture initiation. At that time, approximately 80% of the shoots were rooted well in half-strength Ms medium combined with 0.5-2 mgl(-1) IBA for 4-5 weeks before acclimation. It was observed that younger cotyledons (2-3 days after planting (DAP) were more useful as explants than older ones (5-6 DAP) because they had a significantly higher regeneration frequency. We cultured 3 DAP cotyledons of eight cultivars in T4N2 medium to test the efficiency. The regeneration frequency varied from 35.7% to 54.8%, which indicated that this regeneration protocol was effective, although partly genotype dependent. We regard this protocol as an alternative method for micropropagation and germplasm conservation, and the in vitro plantlets may be suitable to set up a transformation system. (c) 2015 Elsevier B.V. All rights reserved.

分类号： S5

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