Ole-e-1 Interacts with FWL Genes to Modulate Cell Division and Determine Fruit Size in Pears.

Area of Science:

• Plant Biology
• Genetics
• Molecular Biology

Background:

• The fruit weight 2.2 (fw2.2) gene regulates fruit size by controlling cell division, but its mechanisms in pears are unknown.
• Pear FWL (fw2.2-like) genes are investigated for their role in cell division and fruit size determination.

Purpose of the Study:

• To elucidate the regulatory mechanisms of pear FWL genes in controlling fruit size.
• To identify interacting proteins of FWL genes and their role in cell division.

Main Methods:

• Fluorescence in situ hybridization (FISH) to analyze gene expression.
• Gene silencing to assess functional impact.
• Yeast two-hybrid screening and Bimolecular fluorescence complementation (BiFC) to identify protein interactions.

Main Results:

• FWL1 and FWL5 expression was higher in smaller pear fruits.
• Silencing FWL5 increased cell number and fruit size.
• Ole-e-1 was identified as a key interacting protein with FWL1/FWL5, positively correlating with fruit size.

Conclusions:

• Pear FWL genes, particularly FWL5, play a crucial role in regulating cell division and fruit size.
• The Ole-e-1 protein interacts with FWL genes, forming a novel regulatory axis for cell cycle control and fruit size determination in pears.