The PavbHLH162-Like-PavbHLH106 Module Positively Regulates Cold Tolerance in Sweet Cherry (Prunus avium L.)

Area of Science:

• Plant Molecular Biology
• Plant Physiology
• Genetics

Background:

• bHLH transcription factors regulate plant growth and stress responses.
• The role of bHLH factors in sweet cherry cold resistance is unknown.

Purpose of the Study:

• Investigate the function of PavbHLH162-like in sweet cherry cold tolerance.
• Elucidate the molecular mechanisms underlying cold resistance.

Main Methods:

• Cloning and characterization of PavbHLH162-like.
• Gain- and loss-of-function studies in tobacco (overexpression and silencing).
• Biochemical assays (Yeast two-hybrid, luciferase assays) and gene expression analysis.

Main Results:

• PavbHLH162-like expression increased under cold stress.
• Overexpression enhanced cold tolerance in tobacco, reducing oxidative damage and increasing protective compounds.
• Silencing PavbHLH162-like increased cold sensitivity.
• PavbHLH162-like interacts with PavbHLH106 and activates PavNAC29-like transcription.

Conclusions:

• PavbHLH162-like is a positive regulator of cold tolerance in sweet cherry.
• It functions by interacting with PavbHLH106 and regulating downstream genes like PavNAC29-like.
• Provides insights into cold resistance mechanisms in sweet cherry.