植物学报 ›› 2023, Vol. 58 ›› Issue (3): 449-460.DOI: 10.11983/CBB22135

• 技术方法 • 上一篇    下一篇

平潭野菊混合瓣型株系再生体系的建立

廖敏凌1, 蒲娅1, 武晓云1, 马朝峰1, 王文奎2, 戴思兰1()   

  1. 1北京市林木分子设计育种高精尖创新中心; 北京林业大学园林学院, 国家花卉工程技术研究中心, 花卉种质创新与分子育种北京市重点实验室, 城乡生态环境北京实验室, 北京 100083
    2福州市规划设计研究院集团有限公司, 福州 350108
  • 收稿日期:2022-06-28 接受日期:2022-09-26 出版日期:2023-05-01 发布日期:2023-05-17
  • 通讯作者: *E-mail: silandai@sina.com
  • 基金资助:
    国家自然科学基金(31530064);国家重点研发计划(2018YFD1000405)

Establishment of Regeneration System of Chrysanthemum indicum in Pingtan with Various Ligulate Floret Form

Minling Liao1, Ya Pu1, Xiaoyun Wu1, Chaofeng Ma1, Wenkui Wang2, Silan Dai1()   

  1. 1Beijing Advanced Innovation Center for Tree Breeding by Molecular Design; Laboratory of Urban and Rural Ecological Environment, Beijing Key Laboratory of Flower Germplasm Innovation and Molecular Breeding, National Flower Engineering Technology Research Center, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
    2Fuzhou Planning Design and Research Institute Group Co. Ltd., Fuzhou 350108, China
  • Received:2022-06-28 Accepted:2022-09-26 Online:2023-05-01 Published:2023-05-17
  • Contact: *E-mail: silandai@sina.com

摘要: 菊科植物因其丰富的舌状花变异类型而具有很高的观赏价值。野菊(Chrysanthemum indicum)作为栽培菊花(C. × morifolium)的近缘野生种之一, 其自然群体中常具有典型的平瓣、匙瓣及管瓣的舌状花变异类型, 是研究菊科植物瓣型变异的优异材料, 而目前缺乏对其再生体系的研究。在福建平潭岛分布的野菊中发现大量舌状花形态变异植株, 该研究以其混合瓣型株系茎间薄层和叶盘为外植体建立再生体系。结果表明, 以茎间薄层为外植体, 诱导愈伤组织和不定芽分化的最优培养基为MS+1.0 mg∙L-1 6-BA+0.5 mg∙L-1 NAA, 接种14天愈伤组织诱导率可达100%。不定芽平均分化时间为25天, 接种40天不定芽分化率可达82%。最佳生根培养基为1/2MS+0.5 mg∙L-1 NAA, 10天生根。移栽植株全部成活, 植株生长状态良好且均保留了混合瓣型的形态特征。该研究初步建立了平潭野菊混合瓣型株系茎间薄层的离体培养再生体系, 为进一步建立其遗传转化体系奠定了基础, 也为解析菊花瓣型变异机理提供了技术方法。

关键词: 野菊, 植物生长调节剂, 再生体系, 混合瓣型株系, 茎间薄层

Abstract: Asteraceae plants have high ornamental value due to their rich petal variation in ray florets. Chrysanthemum indicum is a wild species and closely related to C. × morifolium. Ray florets mutants of C. indicum in natural populations, such as flat, spoon and tubular types, are excellent material for studying petal shapes. However, there is currently a lack of research on its regeneration system. In this experiment, considerable ray floret mutants of C. indicum were found on Pingtan Island, Fujian province, including the plants with flat, spoon and tubular types of ray florets coexisting in the same capitulum, in which leaves and transverse thin cell layers (tTCLs) were used as explants to establish a regeneration system. The results showed that the best medium for callus induction and adventitious bud differentiation of tTCLs was MS+1.0 mg∙L-1 6-BA+0.5 mg∙L-1 NAA, and the induction rate was 100% on the 14th day. The average differentiation time was 25 days, and the differentiation rate reached 82% on the 40th day. The best rooting medium was 1/2MS+0.5 mg∙L-1 NAA, and the rooting time was 10 days. All of the rooted and regenerated seedlings were survived after transplanting and kept the mix type in capitulum. An efficient regeneration system for C. indicum in Pingtan with various ray floret forms was established in this experiment. The results not only laid the foundation for the establishment of a transformation system but also provided technology for future research on the morphological variation in ray florets.

Key words: Chrysanthemum indicum, plant growth regulator, regeneration system, stains with various ligulate floret form, transverse thin cell layer