Time-Course Transcriptomic Profiling of Floral Induction in Cultivated Strawberry

Area of Science:

• Plant Biology
• Molecular Genetics
• Agricultural Science

Background:

• Strawberry flowering initiation and quality are crucial for market timing and economic returns.
• The genetic mechanisms underlying floral induction in strawberries remain largely unelucidated.

Purpose of the Study:

• To investigate gene activity during floral induction in strawberries.
• To identify key genes and regulatory networks involved in strawberry flowering.

Main Methods:

• Time-course transcriptome analysis of the 'Benihoppe' strawberry cultivar's shoot apex.
• Identification and clustering of differentially expressed genes (DEGs).
• Analysis of candidate genes in flowering pathways, hormone signaling, and leaf/flower development.

Main Results:

• 7177 DEGs were identified, grouped into four dynamic expression clusters.
• At least 73 DEGs, including those from NAC, MYB, MADS, and SEB families, were implicated in floral induction.
• Differential expression of hormone signaling genes, notably DELLA (gibberellin pathway inhibitor), was observed.
• Candidate genes like TFL1, SOC1, and GAI-like were validated using qRT-PCR.

Conclusions:

• This study provides a preliminary exploration of the regulatory network for floral induction in strawberries.
• Identified DEGs and hormone signaling pathway genes serve as potential candidates for future research on strawberry flowering.
• Understanding these genetic factors can aid in improving strawberry cultivation and yield.