ArticleAnnals of botany2025
Leaf Na+ effects and multi-trait GWAS point to salt exclusion as the key mechanism for reproductive stage salinity tolerance in rice.
Article in Annals of botany, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Integrative analysis of salt tolerance in wheat using multi-gradient phenotyping and molecular/physiological validation.Frontiers in plant science · 2026Article
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Abstract
BACKGROUND AND
aimsSince salinity stress may occur across stages of rice (Oryza sativa) crop growth, understanding the effects of salinity at the reproductive stage is important, although it has been much less studied than at the seedling stage.
methodsLines from the Rice Diversity Panel 1 (RDP1) and the 3000 Rice Genomes (3KRG) were used to screen morphological and physiological traits, map loci controlling salinity tolerance through genome-wide association studies (GWAS), and identify favourable haplotypes associated with reproductive stage salinity tolerance. KEY
resultsSalt exclusion was identified as the key tolerance mechanism in this study, based on reduced panicle length as flag leaf Na+ increased and a lack of effect of trimming the leaves on genotypic rankings in the salinity treatment. Since larger biomass showed a negative effect on the number of filled grains in multiple experiments, future studies should investigate the effect of whole-plant transpiration levels on salt uptake. In addition to genome-wide significant peaks identified in the single-trait GWAS analyses, six loci showed colocations for multiple traits across experiments. Among these colocating loci, three candidate loci that exhibited favourable haplotypes were also characterized to be involved in co-expression networks, among which apoplast and cell wall functions had been annotated, further highlighting the role of salt exclusion.
conclusionThe loci identified here could be considered as potential sources for improving reproductive stage salinity tolerance in rice.
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