Morphological, Physiological and Molecular Markers for Salt-Stressed Plants

Soltabayeva, Aigerim; Ongaltay, Assel; Omondi, John Okoth; Srivastava, Sudhakar

doi:10.3390/plants10020243

Cited by 82 publications

(58 citation statements)

References 202 publications

(183 reference statements)

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“…Another marker of oxidative stress is the presence of lipid peroxidation products, which react with 2-thiobarbituric acid [17]. In both studied groups of cucumber plants, no significant changes in lipid peroxides content were observed throughout the experiment in response to either dose ( Figure 2B).…”

Section: Discussionmentioning

confidence: 91%

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The Relationship between the Antioxidant System and Proline Metabolism in the Leaves of Cucumber Plants Acclimated to Salt Stress

Naliwajski

Skłodowska

2021

Cells

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The study examines the effect of acclimation on the antioxidant system and proline metabolism in cucumber leaves subjected to 100 and 150 NaCl stress. The levels of protein carbonyl group, thiobarbituric acid reactive substances, α-tocopherol, and activity of ascorbate and glutathione peroxidases, catalase, glutathione S-transferase, pyrroline-5-carboxylate: synthetase and reductase as well as proline dehydrogenase were determined after 24 and 72 h periods of salt stress in the acclimated and non-acclimated plants. Although both groups of plants showed high α-tocopherol levels, in acclimated plants was observed higher constitutive concentration of these compounds as well as after salt treatment. Furthermore, the activity of enzymatic antioxidants grew in response to salt stress, mainly in the acclimated plants. In the acclimated plants, protein carbonyl group levels collapsed on a constitutive level and in response to salt stress. Although both groups of plants showed a decrease in proline dehydrogenase activity, they differed with regard to the range and time. Differences in response to salt stress between the acclimated and non-acclimated plants may suggest a relationship between increased tolerance in acclimated plants and raised activity of antioxidant enzymes, high-level of α-tocopherol as well, as decrease enzyme activity incorporates in proline catabolism.

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Section: Discussionmentioning

confidence: 91%

“…These react with polyunsaturated fatty acids, leading to the formation of lipid peroxides. The changes generated by ROS the physicochemical structure of the plasma membrane: it becomes less fluid, and its permeability increases, resulting in electrolyte leakage [15,17].…”

Section: Introductionmentioning

confidence: 99%

The Relationship between the Antioxidant System and Proline Metabolism in the Leaves of Cucumber Plants Acclimated to Salt Stress

Naliwajski

Skłodowska

2021

Cells

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“…The adverse effects of salinity are the result of complex interactions among morphological, physiological, and biochemical processes involved in seed germination, plant growth, and water and nutrient uptake [ 7 , 8 , 9 ]. High concentrations of salt impose both osmotic and ionic stresses on plants [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L.

Hniličková

Kraus

Vachová

et al. 2021

Plants

157

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In this investigation, the effect of salt stress on Portulaca oleracea L. was monitored at salinity levels of 100 and 300 mM NaCl. At a concentration of 100 mM NaCl there was a decrease in stomatal conductance (gs) simultaneously with an increase in CO2 assimilation (A) at the beginning of salt exposure (day 3). However, the leaf water potential (ψw), the substomatal concentration of CO2 (Ci), the maximum quantum yield of photosystem II (Fv/Fm), and the proline and malondialdehyde (MDA) content remained unchanged. Exposure to 300 mM NaCl caused a decrease in gs from day 3 and a decrease in water potential, CO2 assimilation, and Fv/Fm from day 9. There was a large increase in proline content and a significantly higher MDA concentration on days 6 and 9 of salt stress compared to the control group. After 22 days of exposure to 300 mM NaCl, there was a transition from the C4 cycle to crassulacean acid metabolism (CAM), manifested by a rapid increase in substomatal CO2 concentration and negative CO2 assimilation values. These results document the tolerance of P. oleracea to a lower level of salt stress and the possibility of its use in saline localities.

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“…The combination of these stresses directly influences fruit production in plants due to the considerable adverse effects on the composition of amino acids, proteins, and carbohydrates [ 9 ]. The production of reactive oxygen species (ROS) due to oxidation stress under high salt levels is another prominent threat as thesedamage the proteins, nucleic acids, and other biomolecules, thus limiting plant metabolism and yield [ 10 ]. This oxidative burst in the form of ROS induces the peroxidation of lipids, resulting in the production of lipid radicles and malondialdehyde (MDA), thereby damaging cellular membranes [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Foliar Spray of Alpha-Tocopherol Modulates Antioxidant Potential of Okra Fruit under Salt Stress

Naqve

Wang

Shahbaz

et al. 2021

Plants

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As an antioxidant, alpha-tocopherol (α-Toc) protects plants from salinity-induced oxidative bursts. This study was conducted twice to determine the effect of α-Toc as a foliar spray (at 0 (no spray), 100, 200, and 300 mg L−1) to improve the yield and biochemical constituents of fresh green capsules of okra (Abelmoschus esculentus L. Moench) under salt stress (0 and 100 mM). Salt stress significantly reduced K+ and Ca2+ ion concentration and yield, whereas it increased H2O2, malondialdehyde (MDA), Na+, glycine betaine (GB), total free proline, total phenolics, and the activities of catalase (CAT), guaiacol peroxidase (GPX), and protease in both okra varieties (Noori and Sabzpari). Foliar application of α-Toc significantly improved the yield in tested okra varieties by increasing the activity of antioxidants (CAT, GPX, SOD, and ascorbic acid), accumulation of GB, and total free proline in fruit tissues under saline and non-saline conditions. Moreover, α-Toc application as a foliar spray alleviated the adverse effects of salt stress by reducing Na+ concentration, MDA, and H2O2 levels and improving the uptake of K+ and Ca2+. Among the tested okra varieties, Noori performed better than Sabzpari across all physio-biochemical attributes. Of all the foliar-applied α-Toc levels, 200 mg L−1 and 300 mg L−1 were more effective in the amelioration of salinity-induced adverse effects in okra. Thus, we concluded that higher levels of α-Toc (200 mg L−1 and 300 mg L−1) combat salinity stress more effectively by boosting the antioxidant potential of okra plants.

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Morphological, Physiological and Molecular Markers for Salt-Stressed Plants

Cited by 82 publications

References 202 publications

The Relationship between the Antioxidant System and Proline Metabolism in the Leaves of Cucumber Plants Acclimated to Salt Stress

The Relationship between the Antioxidant System and Proline Metabolism in the Leaves of Cucumber Plants Acclimated to Salt Stress

Salinity Stress Affects Photosynthesis, Malondialdehyde Formation, and Proline Content in Portulaca oleracea L.

Foliar Spray of Alpha-Tocopherol Modulates Antioxidant Potential of Okra Fruit under Salt Stress

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