Methods for transient assay of gene function in floral tissues

Area of Science:

• Plant molecular biology
• Functional genomics
• Flower development

Background:

• Studying gene function in flowers is limited by difficulties in creating transgenic plants.
• Transient gene expression assays are often used as an alternative.
• Biolistics and Agrobacterium infiltration are established methods, but their application for gene silencing in floral tissues is less explored.

Purpose of the Study:

• To establish and validate novel transient gene silencing techniques for analyzing gene function in flower petals.
• To assess the efficacy of biolistics-based RNA interference (RNAi) and Agrobacterium infiltration for gene silencing in floral tissues.
• To develop a high-throughput vector for efficient gene silencing studies in petals.

Main Methods:

• Biolistic delivery of inverted repeat constructs targeting chalcone synthase (CHS) and Rosea1 genes in Antirrhinum petals.
• Development of a high-throughput vector for biolistic gene silencing.
• Agrobacterium-infiltration of petal tissues in tobacco and petunia for transient transformation using reporter genes (GUS, GFP).

Main Results:

• Biolistic delivery effectively induced gene silencing of CHS and Rosea1 in Antirrhinum petals.
• Systemic spread of silencing was observed within petal tissues, affecting multiple cell layers and leading to altered pigmentation.
• Successful transient Agrobacterium-mediated transformation of petal tissues in tobacco and petunia was demonstrated using reporter gene expression.

Conclusions:

• Biolistics-based transient RNAi and Agrobacterium infiltration are feasible methods for studying gene function in petals.
• A novel high-throughput vector facilitates efficient gene silencing studies.
• These techniques expand the possibilities for gene function analysis across a wider range of flower species.