Comparison between Salicylic Acid and Pomegranate Peel Extract in Reducing the Deleterious Effect of Salinity Stress on Wheat Plant

Sad, Mervat Shamon; Daw, Mona Gergis

doi:10.3923/ijar.2022.129.140

Cited by 2 publications

(1 citation statement)

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“…Salinity is a major abiotic stress that negatively affects plant growth and productivity. Salt stress is caused by high concentrations of salts in the soil or water supply, which restrict water uptake and disturb the osmotic balance, leading to a variety of physiological and developmental disorders (Sadak & Dawood, 2023; Sadak et al., 2023), such as reactive oxygen species (ROS) accumulation (Sadak & Dawood, 2022), photosynthetic inhibition, membrane leakage, and growth decrease (El‐Bassiouny et al., 2020; Hasegawa et al., 2000; Sadak & Ahmed, 2016).…”

Section: Introductionmentioning

confidence: 99%

Does jasmonic acid mitigate the adverse effects of salt stress on wheat through the enhancement of ascorbate biosynthesis and the induction of glutamate dehydrogenase activity?

Horchani,

Bouallegue,

Abbes

2024

J. Plant Nutr. Soil Sci.

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BackgroundSalt stress is one of the most common abiotic stresses, reducing plant growth and productivity. Thus, the development of suitable management practices to minimize the deleterious effects of salt stress has become necessary.AimsThis study was conducted to investigate the possible mechanisms underlying salt tolerance conferred by jasmonic acid (JA).MethodsSalt‐stressed wheat seedlings were supplemented with 1 mM JA and/or 1 mM ibuprofen (IBU), an inhibitor of endogenous JA biosynthesis, in the culture medium.ResultsThe obtained results showed that salt stress significantly decreased shoot and root dry weight production and relative water contents. This was associated with a noteworthy reduction in leaf and root ascorbate (AsA) concentrations, as well as glutamine synthetase (GS), glutamate synthase (GOGAT), and glutamate dehydrogenase (GDH) activities. Exogenously supplied JA did not affect GS and GOGAT activities in leaves and roots of salt‐treated seedlings. However, noticeable enhancements were observed in growth, AsA concentrations, as well as GDH activities. Likewise, the inhibition of JA biosynthesis by IBU application was accompanied by a significant decrease in seedlings’ growth associated with a noticeable reduction in AsA concentrations and GDH activities. The decreases in growth and GDH activities were also obtained following inhibition of AsA biosynthesis by lycorine (Lyc) application. By contrast, increased GDH activities and enhanced growth were obtained following exogenous AsA supplementation, with or without JA biosynthesis inhibition.ConclusionsThe findings implied that exogenous JA enhanced AsA biosynthesis and induced GDH activity, which further promoted the growth of wheat seedlings in salt‐stressed conditions. Therefore, the stimulation of AsA biosynthesis and GDH activity through JA application in the rhizosphere may be suggested as a vital strategy for strengthening the salt tolerance of wheat plants, at least at the seedling stage.

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