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<p>Environmental stress negatively impacts grain yields, crucial for food security. Several studies have reported influences of salinity on shoots and roots metabolites in spring wheat, but there is a paucity of in-depth information on the extent of these influences on grain metabolome. This study examines metabolome changes in grains from two spring wheat cultivars, GS6058 (salt-sensitive) and JS7 (salt-tolerant), under varying salinity (0 and 80&#xa0;mM NaCl) and photoperiods (22L:2D and 12L:12D). Results indicate that long light duration increases several yield parameters regardless of cultivar. Metabolomic analysis highlighted key metabolites, with amino acids and derivatives constituting the largest group. Twenty-two metabolites were significantly modified between conditions, influencing critical metabolic pathways related to sulphur, purine, and cysteine metabolism. Candidate biomarkers identified include L-cysteine and adenosine, which are implicated in salt and photoperiod adaptations. Our results also present a baseline information which could be useful in gene expression analysis to further understand the roles played by these candidate biomarkers in grain metabolome alterations under combined salinity and photoperiod effects.</p>

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Grain metabolome shifts in spring wheat cultivars under contrasting salinity and photoperiods

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • Ekemini Edet Obok,
  • Anthony Egryinya Eneji,
  • Ping An

摘要

Environmental stress negatively impacts grain yields, crucial for food security. Several studies have reported influences of salinity on shoots and roots metabolites in spring wheat, but there is a paucity of in-depth information on the extent of these influences on grain metabolome. This study examines metabolome changes in grains from two spring wheat cultivars, GS6058 (salt-sensitive) and JS7 (salt-tolerant), under varying salinity (0 and 80 mM NaCl) and photoperiods (22L:2D and 12L:12D). Results indicate that long light duration increases several yield parameters regardless of cultivar. Metabolomic analysis highlighted key metabolites, with amino acids and derivatives constituting the largest group. Twenty-two metabolites were significantly modified between conditions, influencing critical metabolic pathways related to sulphur, purine, and cysteine metabolism. Candidate biomarkers identified include L-cysteine and adenosine, which are implicated in salt and photoperiod adaptations. Our results also present a baseline information which could be useful in gene expression analysis to further understand the roles played by these candidate biomarkers in grain metabolome alterations under combined salinity and photoperiod effects.