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Background <p>Soil salinity severely limits wheat production. Spelt (<i>Triticum spelta</i>. L.) represents a valuable genetic resource for improving the salt tolerance of common wheat, but its underlying mechanisms remains poorly understood.</p> Results <p>Field evaluation of 22 spelt accessions identified 12 salt-tolerant genotypes. Further screening under a NaCl gradient (0–200 mM) selected three superior accessions CWI44398, CWI78968, and CWI44183. Under 150 mM NaCl, these three accessions exhibited greater shoot growth than the salt-tolerant control Jimai 22, while root development was more sensitive. Transcriptomic analysis revealed distinct expression patterns among genotypes, with common pathways including abiotic stress response and MAPK signaling, alongside genotype-specific pathways such as sulfur metabolism and fatty acid elongation. Expression patterns analysis under salt stress further confirmed the RNA-seq results, identifying four positively regulated genes.</p> Conclusions <p>This study identified three salt-tolerant spelt accessions and elucidated conserved and genotype-specific molecular mechanisms, providing valuable resources for salt tolerance breeding in wheat.</p>

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Transcriptome-level dissection provides unique insights into the salt tolerance in spelt (Triticum spelta L.)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月11日

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  • Shengmao Zou,
  • Guohao Han,
  • Yanmin Qie,
  • Siqi Li,
  • Yuanwei Sui,
  • Mengyi Liu,
  • Lige Geng,
  • Jiadong Zhang,
  • Dengan Xu,
  • Ningning Yu,
  • Dongming Li,
  • Yuting Liang,
  • Guantong Pan,
  • Cheng Liu,
  • Yuli Jin,
  • Pengtao Ma

摘要

Background

Soil salinity severely limits wheat production. Spelt (Triticum spelta. L.) represents a valuable genetic resource for improving the salt tolerance of common wheat, but its underlying mechanisms remains poorly understood.

Results

Field evaluation of 22 spelt accessions identified 12 salt-tolerant genotypes. Further screening under a NaCl gradient (0–200 mM) selected three superior accessions CWI44398, CWI78968, and CWI44183. Under 150 mM NaCl, these three accessions exhibited greater shoot growth than the salt-tolerant control Jimai 22, while root development was more sensitive. Transcriptomic analysis revealed distinct expression patterns among genotypes, with common pathways including abiotic stress response and MAPK signaling, alongside genotype-specific pathways such as sulfur metabolism and fatty acid elongation. Expression patterns analysis under salt stress further confirmed the RNA-seq results, identifying four positively regulated genes.

Conclusions

This study identified three salt-tolerant spelt accessions and elucidated conserved and genotype-specific molecular mechanisms, providing valuable resources for salt tolerance breeding in wheat.