Genetic Variation in Wheat Root Transcriptome Responses to Salinity: A Comparative Study of Tolerant and Sensitive...

Area of Science:

• Plant Biology
• Genetics
• Molecular Biology

Background:

• Soil salinity poses a significant threat to global crop production and food security.
• Developing salt-tolerant crops is a vital strategy to maintain agricultural productivity in saline environments.

Purpose of the Study:

• To investigate the genetic basis of salt tolerance in wheat (Triticum aestivum) using RNA sequencing.
• To identify differentially expressed genes (DEGs) and key molecular mechanisms contributing to salt tolerance in wheat.

Main Methods:

• RNA sequencing (RNA-Seq) was employed to analyze gene expression patterns in two contrasting wheat cultivars (Neixiang188, tolerant; Barra, sensitive) under salinity stress.
• Gene Ontology (GO) functional annotation, Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis, and protein-protein interaction (PPI) network prediction were performed on identified DEGs.

Main Results:

• A total of 2983 upregulated and 1091 downregulated DEGs were commonly identified in both wheat accessions.
• 529 salt tolerance-associated DEGs were analyzed, revealing Neixiang188 exhibits superior ion homeostasis, reactive oxygen species (ROS) detoxification, and osmotic adjustment capabilities compared to Barra.
• A theoretical framework for Neixiang188's salt tolerance mechanisms was proposed.

Conclusions:

• This study elucidates the genetic foundation of salt tolerance in wheat, identifying candidate genes for crop improvement.
• The findings enhance understanding of molecular mechanisms underlying plant salt stress responses.
• The research provides valuable insights for guiding future breeding efforts to enhance salt tolerance in crops.