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Localization of Tobacco Yellow Dwarf Virus Replication Using the In Plant Activation (INPACT) Expression Platform
Maiko Kato1, Robert Harding1, James Dale1
1Centre for Agriculture and the Bioeconomy, Queensland University of Technology, Brisbane, Queensland 4000, Australia.
Viruses
|July 2, 2020
Summary
Researchers investigated tobacco yellow dwarf virus (TYDV) replication in tobacco plants using the INPACT system. They found TYDV replication is restricted to phloem-associated cells, offering insights for crop resistance strategies.
Area of Science:
- Plant virology
- Molecular biology
- Crop science
Background:
- Geminiviruses pose significant economic threats to global crops.
- Understanding virus replication sites is crucial for developing novel resistance strategies.
Purpose of the Study:
- To determine the replication site of the mastrevirus tobacco yellow dwarf virus (TYDV) in its host, tobacco.
- To utilize the Rep-inducible In Plant Activation (INPACT) expression platform for this investigation.
Main Methods:
- Developed an infectious clone of TYDV and optimized agroinfiltration for delivery.
- Utilized transgenic tobacco expressing a TYDV-based INPACT cassette with a GUS reporter gene.
- Performed histology to analyze reporter gene expression patterns.
Main Results:
- Successfully established an artificial infection process for TYDV in tobacco.
- Demonstrated TYDV activates GUS reporter gene expression in transgenic plants.
- Reporter gene expression was localized to phloem-associated cell types, indicating restricted tissue tropism.
Conclusions:
- TYDV replication in tobacco exhibits a restricted tissue tropism, primarily occurring in phloem-associated cells.
- This finding provides valuable information for designing molecular resistance strategies against geminiviruses in crops.
