ArticleBMC plant biology2026
Cultivar-specific metabolomic and morpho-physiological responses reveal distinct salt tolerance mechanisms in rice (Oryza sativa L.).
Article in BMC plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Comparative metabolomic profiling reveals salinity tolerance mechanisms in a rice introgression line.Metabolomics : Official journal of the Metabolomic Society · 2026Article
- Functional Annotation of Altered Root Metabolites and Metabolic Pathways in Spring Wheat Cultivars Under Varying Salinity and Photoperiod.Physiologia plantarumArticle
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Abstract
Salt stress significantly limits rice productivity worldwide, highlighting the need for a thorough understanding of cultivar-specific tolerance mechanisms. This study explored the morpho-physiological and metabolomicresponses of four rice cultivars to salinity stress, aiming to identify potential adaptation strategies and candidate tolerance markers. The four rice cultivars (Giza 177, Giza 178, Sakha 104, and Sakha 108) were subjected to 200 mM NaCl treatment for 14 days under controlled conditions. Morpho-physiological parameters measured included fresh weight, relative water content (RWC), proline content, and plant height. Comprehensive metabolomic profiling was performed using GC-MS analysis of leaf and root tissues, followed by multivariate statistical analyses, including principal component analysis (PCA) and variable importance in projection (VIP) scores. Salt stress significantly decreased fresh weight and RWC across all cultivars (p < 0.001) and led to substantial proline accumulation. Sakha 108 showed superior salt tolerance (78.6% tolerance index), maintaining higher biomass and water content under stress conditions. PCA distinguished control from salt-treated samples (PC1: 75.2% variance). Metabolomic analysis identified 114 metabolites in leaf tissues and 97 in roots, with 40 metabolites exhibiting VIP scores greater than 1. Cultivar-specific responses included enhanced amino acid metabolism in Giza 177 and activated lipid metabolism pathways in Sakha 108. Hierarchical clustering highlighted tissue-specific metabolic reprogramming, with only six metabolites displaying conserved expression patterns across all cultivars in leaves. The rice cultivars employed different metabolic strategies for salt tolerance, with Sakha 108 demonstrating integrated mechanisms that combine osmotic adjustment, metabolic flexibility, and water retention. These findings offer initial insights for breeding salt-tolerant rice varieties and understanding plant stress adaptation at the metabolomic level within this experimental system.
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