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Differences in the Temporal Kinetics of the Metabolic Responses to Salinity Between the Salt-Tolerant Thellungiella salsuginea and the Salt-Sensitive Arabidopsis thaliana Reveal New Insights in Salt Tolerance Mechanisms

Lookup NU author(s): Aayush Sharma, Dr Tahar Taybi

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2025 by the authors. To unravel the mechanisms underpinning salt tolerance, different studies have attempted to determine the physiological and genetic variations behind the difference in salt tolerance between Arabidopsis thaliana and the salt-tolerant Thellungiella salsuginea (halophila). Most of these studies were limited to a specific duration of salt treatment and neglected the time response as a possible contributing factor to the higher salt tolerance exhibited by T. salsuginea. In this work, a comprehensive and detailed comparison of the response of the two species to high salinity was conducted at different times for up to ten days of salt treatment. T. salsuginea responded more rapidly and to a higher extent to adjust its metabolism and showed constitutive levels of anticipatory metabolism to salinity. T. salsuginea responded more rapidly in terms of maintaining light use efficiency, limiting the uptake of Na+, and increasing the accumulation of sugars and proline when exposed to salinity. T. salsuginea had much higher constitutive levels of metabolites, including malate, proline, and inositol, in comparison to A. thaliana. Interestingly, T. salsuginea showed a reduction in malate levels under salt treatment in contrast to A. thaliana. These results suggest that constitutive levels and the rapidity of the deployment of resistance mechanisms, together with metabolic plasticity, in response to salt stress are important adaptive traits for salt tolerance in plants.

Publication metadata

Author(s): Sharma A, Taybi T

Publication type: Article

Publication status: Published

Journal: International Journal of Molecular Sciences

Year: 2025

Volume: 26

Issue: 11

Online publication date: 27/05/2025

Acceptance date: 25/05/2025

Date deposited: 24/06/2025

ISSN (print): 1661-6596

ISSN (electronic): 1422-0067

Publisher: MDPI

URL: https://doi.org/10.3390/ijms26115141

DOI: 10.3390/ijms26115141

Data Access Statement: The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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