Efficient Virus-Induced Gene Silencing in Solanum rostratum

Area of Science:

• Plant Molecular Biology
• Weed Science
• Molecular Genetics

Background:

• Solanum rostratum, a fast-growing and widespread weed, produces the harmful toxin solanine.
• Limited molecular biology research on S. rostratum is due to a lack of transgenic methods and sequence data.
• Virus-induced gene silencing (VIGS) is a valuable technique for plant gene function studies.

Purpose of the Study:

• To establish tobacco rattle virus (TRV)-derived VIGS in Solanum rostratum.
• To enable molecular studies of gene function in S. rostratum.

Main Methods:

• Cloned S. rostratum phytoene desaturase (PDS) and Chlorophyll H subunit (ChlH) genes as VIGS reporters.
• Applied TRV-based VIGS to S. rostratum plants.
• Compared gene silencing efficiency across different infection methods (true leaf, cotyledon, sprout infiltration).

Main Results:

• High-efficiency VIGS was achieved in S. rostratum leaves, flowers, and fruit.
• True leaf infection proved more efficient for long-term VIGS across multiple organs compared to other methods.
• Successful gene silencing of PDS and ChlH was demonstrated.

Conclusions:

• Virus-induced gene silencing (VIGS) technology is effectively established in Solanum rostratum.
• This VIGS system facilitates future functional genomics research in S. rostratum.
• Utilizing tomato genomic sequences alongside VIGS can advance S. rostratum gene function studies.