1. The Role of Salicylic Acid in Salinity Stress Mitigation in Dizygostemon riparius : A Medicinal Species Native to South America.
- Author
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Albuquerque IC, Silva-Moraes VKO, Alves GL, Pinheiro JF, Henschel JM, Lima ADS, Rivas PMS, Andrade JR, Batista DS, Reis FO, Ferraz TM, Figueiredo FAMMA, Catunda PHA, Corrêa TR, and Felipe SHS
- Abstract
Salicylic acid (SA) is a bioregulator well-known for mitigating salinity damage in plants. However, no studies have examined the interaction between SA and salinity in Dizygostemon riparius , a species rich in bioactive molecules. Therefore, we aimed to evaluate the effect of SA application on Dizygostemon riparius under different salinity levels. A completely randomized experiment was conducted in a 2 × 3 factorial design (two SA concentrations of 0 and 100 µM and three salinity concentrations of 0, 200, and 400 mM NaCl) with five replicates. At 400 mM NaCl, leaf temperature increased by 11%, while relative water content and total soluble carbohydrates decreased by 30% and 35%, respectively, leading to reduced biomass accumulation. Notably, the SA application mitigated these effects by restoring relative water content under 400 mM NaCl and improving carboxylation efficiency and intrinsic water-use efficiency under 200 mM NaCl. Additionally, dry biomass was maintained under both 200 and 400 mM NaCl with SA treatment. These findings suggest that SA has a promising potential to alleviate salt stress in Dizygostemon riparius . Our results could inform cultivation practices, opening new perspectives on the use of SA as an attenuator of salinity stress.
- Published
- 2024
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