Researchers at Tsinghua University Develop Mosaic Virus-Based Gene Expression Vector for Maize Plants

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Researchers at Tsinghua University have developed a novel approach to gene expression in plants using mosaic viruses. By engineering the sugarcane mosaic virus (SCMV) as a dual gene expression vector, the team demonstrated its ability to efficiently express two heterologous proteins in maize plants. This breakthrough has significant implications for functional genetic studies in plants and could lead to the development of new genetic tools.

Key Takeaways:

  • The researchers engineered SCMV as a dual gene expression vector for simultaneous expression of two heterologous proteins in maize plants.
  • The vector permitted efficient gene expression in systemically infected leaves and had the genetic capacity to insert more than 1800 bp of foreign DNA.
  • The vector's junction sites (NIb/CP and P1/HC-Pro) were found to be suitable for heterologous gene insertion and expression.
  • Two different genes (GFP and mCherry) were expressed simultaneously by engineering them into either of the junction sites of the same vector.
  • The study demonstrates the suitability of SCMV as a transient dual gene expression vector for maize plants.
  • The research was funded by the Ministry of Agriculture and Rural Affairs of the People's Republic of China, the Ministry of Science and Technology, and the National Natural Science Foundation of China.
  • The authors include Huangai Li, Ke Xie, Xiyin Zheng, Meng Han, Asigul Ismayil, Na Liu, Xiang Wei, Rong Zhong, Yan Wang, and Yule Liu.

Statistics:

  • Over 1800 bp of foreign DNA was inserted into the SCMV vector.
  • The vector permitted efficient gene expression in systemically infected leaves.
  • The study demonstrated the suitability of SCMV as a transient dual gene expression vector for maize plants.
  • The research was funded by three different government agencies.
  • The referenced journal article was published in Phytopathology Research, with a full text available at https://doi.org/10.1186/s42483-025-00330-8.

Sources:

  • Huangai Li et al. Establishment of sugarcane mosaic virus-based vector for dual gene expression in maize. Phytopathology Research, 2025,7(1):1-13. (Phytopathology Research - https://phytopatholres.biomedcentral.com/)
  • "Virus-based gene expression is a simple and powerful approach for functional genetic studies in plants." (Tsinghua University)