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Purpose <p>The concept of intergenerational stress memory is particularly intriguing for enhancing adaptive responses to salinity, one of the major abiotic stresses affecting agriculture globally. This study aimed to investigate the genetic makeup of stress memory by improving the antioxidant system&#xa0;for salt-stress-resilient wheat genotypes. </p> Methods <p>Genome-wide association scan (GWAS) and linkage disequilibrium were&#xa0;used to investigate the genetic factors that control stress memory and salinity&#xa0;tolerance via enhancing antioxidant pathways in a world-wide&#xa0;diverse collection of 111 wheat accessions.</p> Results <p>Our results reported that seeds from stressed plants (SP) exhibited a highly significant increase in germination parameters when compared to non-stressed plants (NP) in response to salt treatment. Similarly, a significant increase in all of the measured antioxidant components for stressed wheat genotypes under salinity conditions. Interestingly, GWAS analysis identified 69 single nucleotide polymorphism (SNP) markers substantially connected to all evaluated traits during salt treatment and associated with multiple potential candidate genes. Calcium ion-binding protein genes are crucial to barley and wheat salt stress response. Through a complex network of detection, signaling, and response regulation, these genes allow plants to detect salt intake, activate and control metabolic pathways, and adjust growth and development. Markedly, wheat genotypes for stressed seeds carrying G allele showed higher antioxidant contents than the genotypes carrying A allele, suggesting the positive selection of wheat genotypes with G allele.</p> Conclusions <p>Gaining a deeper understanding of these genes and their mechanisms can lead to the development of more effective methods for developing cereal crops that are resistant to elevated salt levels.</p>

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Genetic Insights into Intergenerational Stress Memory and Salt Tolerance Mediated by Antioxidant Responses in Wheat

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Samar G. Thabet,
  • Fatmah Ahmed Safhi,
  • Andreas Börner,
  • Ahmad M. Alqudah

摘要

Purpose

The concept of intergenerational stress memory is particularly intriguing for enhancing adaptive responses to salinity, one of the major abiotic stresses affecting agriculture globally. This study aimed to investigate the genetic makeup of stress memory by improving the antioxidant system for salt-stress-resilient wheat genotypes.

Methods

Genome-wide association scan (GWAS) and linkage disequilibrium were used to investigate the genetic factors that control stress memory and salinity tolerance via enhancing antioxidant pathways in a world-wide diverse collection of 111 wheat accessions.

Results

Our results reported that seeds from stressed plants (SP) exhibited a highly significant increase in germination parameters when compared to non-stressed plants (NP) in response to salt treatment. Similarly, a significant increase in all of the measured antioxidant components for stressed wheat genotypes under salinity conditions. Interestingly, GWAS analysis identified 69 single nucleotide polymorphism (SNP) markers substantially connected to all evaluated traits during salt treatment and associated with multiple potential candidate genes. Calcium ion-binding protein genes are crucial to barley and wheat salt stress response. Through a complex network of detection, signaling, and response regulation, these genes allow plants to detect salt intake, activate and control metabolic pathways, and adjust growth and development. Markedly, wheat genotypes for stressed seeds carrying G allele showed higher antioxidant contents than the genotypes carrying A allele, suggesting the positive selection of wheat genotypes with G allele.

Conclusions

Gaining a deeper understanding of these genes and their mechanisms can lead to the development of more effective methods for developing cereal crops that are resistant to elevated salt levels.