Transient Expression Assay in Strawberry Fruits.

Area of Science:

• Plant Biology
• Molecular Biology
• Fruit Development

Background:

• Strawberry (Fragaria spp.) is a model for fruit development and ripening studies.
• Transient expression systems, like virus-induced gene silencing (VIGS) and Agrobacterium tumefaciens-mediated transformation, are crucial for rapid gene function analysis in strawberries.
• Agrobacterium-mediated transformation offers versatility for gene knockdown, overexpression, and knockout, unlike VIGS.

Purpose of the Study:

• To demonstrate the utility of Agrobacterium-mediated transient transformation for studying gene function in strawberry fruit.
• To showcase the procedure for transiently expressing a construct in F. vesca fruit.
• To present results of gene knockdown in cultivated strawberry fruit.

Main Methods:

• Transient expression of the 35S::FveMYB10 construct in white-fruited Fragaria vesca 'Yellow Wonder' accession.
• Overexpression of FveMYB10, a key regulator of anthocyanin production.
• RNA interference (RNAi) mediated knockdown of Reduced Anthocyanin in Petioles (RAP) in 'Sweet Charlie' strawberry cultivar.

Main Results:

• Overexpression of FveMYB10 induced fruit coloration in F. vesca within one week of infiltration.
• Successful knockdown of the anthocyanin transporter RAP was achieved in cultivated strawberry fruit.
• Agrobacterium-mediated transient transformation proved effective for gene function studies.

Conclusions:

• Agrobacterium-mediated transient transformation is a rapid and adaptable method for investigating gene functions during strawberry fruit ripening.
• This technique facilitates the study of gene regulatory networks controlling fruit coloration and development.
• The versatility of Agrobacterium transformation enhances research capabilities in strawberry genetics.