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林业科学 ›› 2024, Vol. 60 ›› Issue (10): 164-174.doi: 10.11707/j.1001-7488.LYKX20230500

• 研究简报 • 上一篇    

2种溲疏叶片不定芽诱导的组织培养体系构建

王亚鑫1(),尚鑫1,郝英男1,宁小艺1,马跃1,甘思楠1,李进宇2,张鑫1,*()   

  1. 1. 西北农林科技大学林学院 杨凌 712100
    2. 北京市园林绿化科学研究院 北京 100102
  • 收稿日期:2023-10-18 出版日期:2024-10-25 发布日期:2024-11-05
  • 通讯作者: 张鑫 E-mail:wangyaxin@nwafu.edu.cn;xin.zhang@nwsuaf.edu.cn
  • 基金资助:
    北京市园林绿化研究院绿化植物育种项目(YZQN202301);北京市重点实验室课题(K4050423193、K4050422164、K4020121025)。

Establishment of Tissue Culture Systems for Inducing Adventitious Buds from Leaves of Two Deutzia Species

Yaxin Wang1(),Xin Shang1,Yingnan Hao1,Xiaoyi Ning1,Yue Ma1,Sinan Gan1,Jinyu Li2,Xin Zhang1,*()   

  1. 1. College of Forestry, Northwest A & F University Yangling 712100
    2. Beijing Academy of Forestry and Landscape Architecture Beijing 100102
  • Received:2023-10-18 Online:2024-10-25 Published:2024-11-05
  • Contact: Xin Zhang E-mail:wangyaxin@nwafu.edu.cn;xin.zhang@nwsuaf.edu.cn

摘要:

目的: 通过溲疏属植物叶片诱导不定芽,建立完整的组织培养体系,为构建溲疏属植物遗传转化体系和分子育种提供参考,也为从头驯化野生溲疏属植物种质资源的创新提供理论依据和实践指导。方法: 以2种陕西秦岭常见野生溲疏属植物(小花溲疏和钩齿溲疏)的带叶茎段作为外植体,通过初代培养、继代培养和生根培养建立其快速繁殖体系,再利用培养植株的叶片诱导愈伤组织和不定芽诱导的方式建立其叶片诱导不定芽体系。结果: 外植体最佳消毒方式为75%乙醇表面消毒10 s,0.1%升汞表面消毒3 min,其成活率为100%,污染率为0。小花溲疏丛生芽增殖最佳的培养基配方为MS + 2 mg?L?1 6-BA,其增殖系数为2.8。钩齿溲疏丛生芽最佳培养基配方为MS + 5 mg?L?1 6-BA,其增殖系数为4.53。生根培养最佳的培养基配比为1/2 MS + 0.8 mg?L?1 IBA,其小花溲疏的生根系数为1.74,钩齿溲疏的生根系数为7.86。选择30天生根苗从上至下第2~4节叶片作为诱导愈伤组织的外植体材料。小花溲疏叶片诱导愈伤组织最佳的培养基配比为WPM + 1 mg?L?1 2,4-D,其诱导率为63%,钩齿溲疏叶片诱导愈伤组织最佳的培养基配比为WPM + 0.1 mg?L?1 2,4-D,其诱导率为70%。结论: 以小花溲疏和钩齿溲疏的叶片作为外植体,成功建立了诱导不定芽形成和植株再生体系。小花溲疏叶片不定芽分化最佳的培养基配比为MS + 2 mg?L?1 6-BA + 0.3 mg?L?1 IBA,钩齿溲疏叶片不定芽分化最佳的培养基配比为MS + 5 mg?L?1 6-BA + 0.05 mg?L?1 NAA。

关键词: 溲疏属, 不定芽, 耐荫, 灌木, 从头驯化

Abstract:

Objective: Seeds of Deutzia are small, and their survival rate is low. Because the branches of Deutzia are hollow, branch propagation is difficult. This study aims to establish a complete tissue culture system through the induction of adventitious buds from the leaves of plants in the genus Deutzia, and lay the foundation for the genetic transformation system and molecular breeding. It also provides theoretical basis and practical guidance for the innovation of de novo domestication of wild Deutzia. Method: In this study, branches with leaves of D. parviflora and D. baroniana, two common species of Deutzia in the Qinling Mountains of Shaanxi Province, were used as explants. The explants were used for primary culture, subculture, rooting culture, and then, the leaves of the cultured plantlets were used to induce callus and adventitious buds. Result: The optimal disinfection method of explants was to disinfect the surface with 75% alcohol for 10s and 0.1% mercuric chloride for 3 min. The survival rate was 100% and the contamination rate was 0. The optimal medium for D. parviflora subculture was MS + 2 mg?L?1 6-BA, and the proliferation coefficient was 2.8. The optimal medium for D. baroniana subculture was MS + 5 mg?L?1 6-BA?1, and the proliferation coefficient was 4.53. The optimal medium for rooting culture was 1/2 MS + 0.8 mg?L?1 IBA, with the proliferation coefficient of 1.74 for D. parviflora and 7.86 for D. baroniana. The explants for callus induction were the leaves on the 2–4 nodes from top to bottom of 30 day old root seedlings. The optimal medium for D. parviflora leaves to induce callus was WPM + 1 mg?L?1 2,4-D, with the induction rate of 63%. The optimal medium for D. baroniana leaves to induce callus was WPM + 0.1 mg?L?1 2,4-D, and the induction rate was 70%. Conclusion: This study has successfully established a regeneration system for adventitious shoot induction and plant formation using the leaves of D. parviflora and D. baroniana as explants. The optimal medium for D. parviflora adventitious bud differentiation from leaves was MS + 2 mg?L?1 6-BA + 0.3 mg?L?1 IBA. The optimal medium for the adventitious bud differentiation from D. baroniana leaves was MS + 5 mg?L?1 6-BA+ 0.05 mg?L?1 NAA.

Key words: Deutzia, adventitious bud, shade-tolerant, shrubs, de novo domestication

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