Integrated sRNA-seq and RNA-seq Analyses Reveal a microRNA Regulation Network Involved in Cold Response in Pisum...

Area of Science:

• Plant Science
• Molecular Biology
• Genomics

Background:

• Cold stress significantly impacts plant growth and crop productivity.
• Next-generation sequencing (NGS) advances molecular understanding of plant stress resistance.
• MicroRNAs (miRNAs) are key regulators of gene expression during stress responses.

Purpose of the Study:

• To investigate the molecular mechanisms of cold stress response in pea (Pisum sativum L.).
• To identify key microRNAs (miRNAs) and their target genes involved in frost tolerance.
• To analyze differential gene expression patterns under low-temperature conditions.

Main Methods:

• Time-series sequencing of small RNAs (sRNAs) and messenger RNAs (mRNAs) in pea.
• Comparison of frost-tolerant (Champagne) and frost-sensitive (Térèse) pea lines.
• Integrative analysis of sequencing data to identify regulatory networks.

Main Results:

• Identified 136 unique miRNAs in pea plants under cold stress.
• Discovered 39 miRNA/mRNA target pairs with opposing expression patterns.
• Revealed significant roles for specific miRNA families in cold acclimation.

Conclusions:

• The cold response in pea involves 11 miRNA families.
• Identified target genes are associated with antioxidative and multi-stress defense.
• Findings highlight the role of miRNAs in cell wall biosynthesis during cold stress.