利用茎尖不定芽建立朝鲜蓟高效再生体系
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Establishment of efficient regeneration system on Cynara scolymus L.via direct adventitious buds in vitro
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    摘要:

    为建立稳定、高效的朝鲜蓟植株再生无性繁殖体系,以农艺性状好、无病毒的朝鲜蓟茎尖为外植体,研究消毒方法、培养基、植物生长调节剂对朝鲜蓟组培苗增殖及生根的影响。结果表明:将朝鲜蓟的茎尖用70%乙醇消毒10 s,再用0.1% HgCl2(每1 000 mL该溶液加2滴吐温80)处理8 min的外植体消毒方式效果最好,接种污染较小;最适合朝鲜蓟离体培养的基本培养基为EM培养基,6–BA诱导朝鲜蓟丛芽增殖的效果比KT和2–ip好,在EM中添加1 mg/L 6–BA+0.5 mg/L NAA的培养基最适合朝鲜蓟茎尖初代培养;在丛生芽的继代培养中,以添加0.5 mg/L NAA的效果最佳,以GM为基本培养基,添加1.0 mg/L NAA+1.0 mg/L β–CD的生根效果好,生根率达99.3%,且移栽后成活率达90 %以上。

    Abstract:

    Shoot apex with excellent agronomic characters and disease–free planting materials, which were used as explants, were studied on different types of culture medium, and on the culture media treated by adding different species and concentrations of plant hormones after sterilization with different treatments for Cynara scolymus L. ’s multiplication and rooting of tissue culture, to establish tissue culture seedling’s propagation technology system. The results showed that the best method of sterilization was the second combination, that was, The Cynara scolymus L. ’s shoot apex were sterilized by alcohol(70%) with 10 seconds firstly, then were sterilized by HgCl2(0.1%) for 8 minutes, and it showed the least pollution-induced infection. EM was the most suitable medium used in culturing Cynara scolymus L. in vitro, 6–BA was more effective than KT and 2–ip in the induction of artichoke bud proliferation. Regarding the primary culture, it recorded the best values of growth when the modified medium containing 1 mg/L 6–BA+0.5 mg/L NAA was used, while the fascicular buds grew best when the modified medium containing 0.5 mg/L 6–BA was used for the secondary culture. At the same time, by optimizing the rooting medium containing 1/2 EM, 1.0 mg/L NAA and 1.0 mg/L β–CD, the rate of rooting reached to 99.3%. And these young shoots cultured using the methods were vigorous with dark green leaf, then the transplant survival rate was over 90%.

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王中美.利用茎尖不定芽建立朝鲜蓟高效再生体系[J].湖南农业大学学报:自然科学版,2012,38(6):612-616.

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  • 收稿日期:2012-09-25
  • 最后修改日期:2012-09-25
  • 录用日期:2012-09-29
  • 在线发布日期: 2012-11-30
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