欢迎访问《草业学报》官方网站,今天是

草业学报 ›› 2025, Vol. 34 ›› Issue (12): 183-194.DOI: 10.11686/cyxb2025047

• 研究论文 • 上一篇    

基于纳米磁珠介导的狼尾草花粉管通道转化法体系的建立

王豫婉1,2(), 刘凌云3, 郭一荻3, 范希峰3, 岳跃森3, 穆娜3, 肖国增1,2(), 滕珂3()   

  1. 1.长江大学园艺园林学院,湖北 荆州 434025
    2.长江大学香辛园艺植物种质创新与利用湖北省重点实验室,湖北 荆州 434025
    3.北京市农林科学院草业花卉与景观生态研究所,北京 100097
  • 收稿日期:2025-02-18 修回日期:2025-04-15 出版日期:2025-12-20 发布日期:2025-10-20
  • 通讯作者: 肖国增,滕珂
  • 作者简介:E-mail: tengke.123@163.com
    E-mail: x_gz99@163.com
    王豫婉(2001-),女,河南信阳人,在读硕士。E-mail: 1994820747@qq.com
  • 基金资助:
    北京市农林科学院创新能力建设专项(KJCX20250917);北京市农林科学院创新能力建设专项(KJCX20230119);北京市农林科学院创新能力建设专项(KJCX20251208);云南省科技计划(202403AP140045)

Efficient transformation of Pennisetum alopecuroides using pollen transfected by DNA-coated magnetic nanoparticles

Yu-wan WANG1,2(), Ling-yun LIU3, Yi-di GUO3, Xi-feng FAN3, Yue-sen YUE3, Na MU3, Guo-zeng XIAO1,2(), Ke TENG3()   

  1. 1.The College of Horticulture and Garden,Yangtze University,Jingzhou 434025,China
    2.Hubei Key Laboratory of Spices & Horticultural Plant Germplasm Innovation & Utilization,Yangtze University,Jingzhou 434025,China
    3.Institute of Grassland,Flowers and Landscape Ecology,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China
  • Received:2025-02-18 Revised:2025-04-15 Online:2025-12-20 Published:2025-10-20
  • Contact: Guo-zeng XIAO,Ke TENG

摘要:

近年来纳米磁珠介导的遗传转化体系克服了传统转基因方法需组织培养再生的问题,能够缩短转基因植物培育周期,适用范围广泛。目前狼尾草尚未建立纳米磁珠介导的转化体系,且现有遗传转化体系尚不成熟。为建立纳米磁珠介导的狼尾草花粉转化体系,本研究以‘丽秋’狼尾草为材料,分析了‘丽秋’狼尾草花粉转染的最适温度和处理时间、纳米磁珠负载能力、杂交授粉和转基因株系筛选等纳米磁珠介导转化的关键环节。结果表明:与12、16和25 ℃处理相比,4和8 ℃下狼尾草花粉的活力较高。开孔转染时间0.5~2.0 h的花粉开孔率无显著差异,不同开孔转染时间下的花粉活力无显著差异,故选择了0.5 h为转染开孔时间。用转染后的花粉对‘丽秋’狼尾草进行授粉,随机挑选了自然结实获得的150粒种子。播种后利用80 mg·L-1潮霉素进行筛选,之后经PCR检测和GFP荧光蛋白观察,获得了7株转基因植株。本研究建立了狼尾草纳米磁珠介导的花粉管通道转化法体系,5个月左右可以获得转基因苗,转化率达4.66%,为狼尾草遗传转化和分子改良提供了新的可行方案。

关键词: 狼尾草, 纳米磁珠, 花粉孔, 花粉磁转染, 转基因植株

Abstract:

In recent years, nanoparticle-mediated gene transformation has overcome the problem of traditional transgenic methods that require tissue regeneration and culture. This method shortens the cultivation cycle of transgenic plants, and has a wide range of applications. No mature genetic transformation systems are available forthe grass Pennisetum alopecuroides, so the aim of this study was to develop a nano-magnetic bead-mediated transformation system for this plant. The P. alopecuroides ‘Liqiu’ was used to optimize the key steps including transfection temperature and processing time, nanomagnetic bead loading capacity, and the hybridization and screening of transgenic lines. The results showed that the vitality of P. alopecuroides pollen was higher after treatments at 4 and 8 °C than after treatments at 12, 16, and 25 °C. There was no siginificant difference in the pollen opening rate between 0.5 and 2 hours of transfection time, and pollen vitality was not affected by the duration of the transfection time. Accordingly, 0.5 hours was selected as the transfection time. The transfected pollen was used to pollinate P. alopecuroides ‘Liqiu’, and 150 seeds were randomly selected from the naturally obtained hybrid seeds. Transgenic seedlings were screened on medium containing 80 mg·L-1 hygromycin. Subsequently, PCR detection and green fluorescent protein observation results confirmed that seven transgenic plants had been obtained. In summary, a pollen tube channel transformation system based on DNA-coated nanomagnetic beads was established for P. alopecuroides. Our results show that transgenic seedlings can be generated within 5 months with a transformation rate of about 4.66%. This system represents a new solution for genetic transformation and molecular improvement of P. alopecuroides in the future.

Key words: Pennisetum alopecuroides, magnetic nanoparticles, pollen pore, pollen magnetofection, transgenic plant