ArticleAnnals of botany2025
The role of aerenchymatous gas spaces in root sodium ion management under salt stress: do they matter 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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Who cites it
1 citing paper in PubMed.
- An Energy Signalling Pathway Regulates the Aerenchyma Formation in Roots Under Environmental Stresses-A Perspective.Plant, cell & environment · 2026Article
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6 authors.
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Abstract
BACKGROUND AND
aimsIncreasing soil salinity is an emerging and potent threat to agricultural crop production. Plant root tissues are the most important place for salt sensing. Thus, root traits associated with salt tolerance are very important. Identification of new root traits might help us to optimize the overall performance of plants under stress.
methodsAn experiment was conducted with eight rice genotypes, and root aerenchymatous gas space, Na+ and K+ concentrations of roots and leaves were measured. Another experiment was performed with four selected rice genotypes based on morphological, physiological, biochemical and molecular traits. KEY
resultsWe identified that root tissue porosity and root aerenchymatous gas space were increased under salt stress, and the induction of these traits was greater in salt-tolerant genotypes (FL478, AC39416A and Rashpanjor) compared with a salt-susceptible genotype (Naveen). Most interestingly, root porosity and aerenchymatous gas space showed a strong correlation with leaf Na+ ion concentration and with leaf and root K+ ion retention. Thereby, it seems that more porous roots can play an important role in Na+ transport and K+ retention in salt-tolerant rice plants. Additionally, we observed relatively higher expression of reactive oxygen species-induced NADPH oxidase (OsNOX5 and OsNOX9) genes, whose function is associated with programmed cell death and formation of lysigenous aerenchyma in rice, in FL478, AC39416A and Rashpanjor compared with Naveen.
conclusionsOverall, the findings suggest that tolerant and moderately tolerant rice genotypes followed programmed cell death in root cortical tissues that help to restrict upward movement of Na+ and retention of K+ in rice in saline conditions.
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