植物学报 ›› 2023, Vol. 58 ›› Issue (5): 760-769.DOI: 10.11983/CBB22141

• 技术方法 • 上一篇    下一篇

根癌农杆菌介导万寿菊遗传转化体系的建立

余晓敏1, 王亚琴1, 刘雨菡1, 易庆平2, 程文翰2, 朱钰1, 段枫1, 张莉雪1, 何燕红1,2,*()   

  1. 1.华中农业大学园艺林学学院, 果蔬园艺作物种质创新与利用全国重点实验室, 武汉 430070
    2.荆楚理工学院, 特色花卉生物育种湖北省工程研究中心, 荆门 448000
  • 收稿日期:2022-07-02 接受日期:2022-12-02 出版日期:2023-09-01 发布日期:2023-09-21
  • 通讯作者: *E-mail: hyh2010@mail.hzau.edu.cn
  • 基金资助:
    国家自然科学基金(32172616);特色花卉生物育种湖北省工程研究中心开放课题(2022ZD007)

Establishment of Agrobacterium tumefaciens-mediated Genetic Transformation System of Marigold (Tagetes erecta)

Yu Xiaomin1, Wang Yaqin1, Liu Yuhan1, Yi Qingping2, Cheng Wenhan2, Zhu Yu1, Duan Feng1, Zhang Lixue1, He Yanhong1,2,*()   

  1. 1. National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
    2. Hubei Engineering Research Center for Specialty Flowers Biological Breeding, Jingchu University of Technology, Jingmen 448000, China
  • Received:2022-07-02 Accepted:2022-12-02 Online:2023-09-01 Published:2023-09-21
  • Contact: *E-mail: hyh2010@mail.hzau.edu.cn

摘要: 以万寿菊(Tagetes erecta)里程碑·黄色的小叶为外植体, 采用农杆菌介导法探究抗生素浓度、菌株类型、菌液浓度、侵染时间、共培养时间、乙酰丁香酮浓度和抗褐化剂种类对万寿菊遗传转化效率的影响。结果表明, 头孢霉素(Cef)和硫酸卡那霉素(Kan)的适宜浓度分别为100 mg·L-1和10 mg·L-1; EHA105菌株的稳定转化效率最高; 菌液浓度OD600=0.1、侵染5分钟及共培养1天为最佳侵染条件。此外, 在侵染过程中添加100 µmol·L-1乙酰丁香酮(AS)和筛选培养基中添加0.2 g·L-1聚乙烯吡咯烷酮(PVP)均能提高出芽率。经GUS染色、PCR检测以及Southern blot检测证明转化成功, 转化效率达到4%左右。研究结果为万寿菊基因功能研究和转基因育种奠定了基础。

关键词: 根癌农杆菌, 遗传转化, 小叶, 万寿菊

Abstract: In this study, we used the leaflets of marigold (Tagetes erecta) Milestone Yellow as explants to investigate the major factors impacting the transformation efficiency of Agrobacterium-mediated method. The factors included antibiotic concentration, strain type, bacterial concentration, infection time, co-culture time, acetosyringone concentration and anti-browning agent type. We found that the suitable concentrations of cefotaxim sodium salt and kanamycin sulfate were 100 mg·L-1 and 10 mg·L-1, respectively. We also found that the strain EHA105 had the highest transformation efficiency up to 4%. The best infection conditions for EHA105 were at bacterial concentration of 0.1 for OD600, infected for 5 minutes, and co-cultured for 1 day. In addition, the bud germination rate could be improved by both applying 100 μmol·L-1 acetosyringone during the infection process and adding 0.2 g·L-1 polyvinyl pyrrolidone in the screening medium. This study laid a foundation for marigold gene function research and transgenic breeding.

Key words: Agrobacterium tumefaciens, genetic transformation, leaflet, marigold