藏药匙叶翼首草高频组织培养再生体系优化研究
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西藏林芝市科技计划(201504);


Efficient in vitro Plant Regeneration System of Tibetan Medicine Pterocephalus hookeri (C.B.Clarke) Heck
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    摘要:

    以匙叶翼首草种子为材料,探索种子最佳消毒方法,对影响无菌苗外植体愈伤组织诱导、增殖及植株再生的因素进行了研究。结果表明:(1)剥去外种皮的种子,经75%乙醇 1 min+0.1% HgCl2 7 min+50%多菌灵500倍液30 min消毒后,在1/2 MS培养基中的发芽率达60.67%,无污染。(2)无菌苗的叶片和茎段都适宜诱导愈伤组织,在培养基MS+5.0 mg·L-1 6BA+2.0 mg·L-1 2,4D中可在10 d内诱导出生长旺盛的愈伤组织,愈伤诱导率分别为84.00%、97.33%。(3)适宜的愈伤组织增殖培养基为MS+3.0 mg·L-1 6BA+2.0 mg·L-1 IAA,培养20 d的叶片和茎段愈伤组织的生长率分别为74.37%、70.52%。(4)适宜的丛生芽诱导培养基为MS+3.0 mg·L-1 6BA+2.0 mg·L-1 IAA+250 mg·L-1 L脯氨酸+150 mg·L-1 水解酪蛋白,30 d后茎段和叶片的丛生芽发生率分别达到100%、94.44%。(5)再生苗在1/2 MS+0.5 mg·L-1 NAA培养基中生根培养30 d,生根率为100%。匙叶翼首草高效稳定的再生体系为保护其野生资源和工厂化育苗提供了有效途径。

    Abstract:

    To establish a stable and highefficiency plant regeneration system for Pterocephalus hookeri (C.B.Clarke) Heck via plant tissue culture, we studied the optimum seed disinfection method, and the main factors which affected callus induction, proliferation and plant regeneration of explants from aseptic seedling. The results indicated that: (1) the optimum disinfection method for seeds removed exopleura of P. hookeri was 75% ethanol 1 min+0.1% HgCl2 7 min+derosal (50%wp, diluted 500 times)30 min, the seeds were thoroughly bioclean, and the germination rate was 60.67%. (2) Leaf piecesand stem segments excised from the seedlings were suitable to induce calluses with the percentage of 84.00% and 97.33% respectively on medium MS+5.0 mg·L-1 6BA+2.0 mg·L-1 2,4D after 10 d. (3) The optimal medium for callus proliferation was MS+3.0 mg·L-1 6BA+2.0 mg·L-1 IAA, growth rate of calluses reached 74.37% and 70.52% with leaf pieces and stem segments, respectively. (4) The optimal medium for clustered shoots induction was MS+3.0 mg·L-1 6BA+2.0 mg·L-1 IAA+250 mg·L-1 Lproline+150 mg·L-1 casein hydrolysate, the differentiation rate were 100% and 94.44% with leaf and stem, respectively. (5) The optimal rooting medium was 1/2 MS+0.5 mg·L-1 NAA, the rooting rate was 100% after 30 d. As a result, an efficient plant regeneration system was established in order to provide an effective solution for protecting the wild resources and industrial seedling of P. hookeri.

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袁 芳,李 晶,任海平,等.藏药匙叶翼首草高频组织培养再生体系优化研究[J].西北植物学报,2017,37(2):379-386

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  • 在线发布日期: 2017-03-23
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