Regulatory Role of Silicon on Growth, Potassium Uptake, Ionic Homeostasis, Proline Accumulation, and Antioxidant Capacity of Soybean Plants Under Salt Stress

Calzada, Kolima Peña; Hurtado, Alexander Calero; Viciedo, Dilier Olivera; Habermann, Eduardo; Prado, Renato de Mello; Oliveira, Reginaldo de; Ajila, Gabriela; Lata-Tenesaca, Luis Felipe; Rodríguez, Juan Carlos; Gratão, Priscila Lupino

doi:10.1007/s00344-023-10921-4

Cited by 16 publications

(10 citation statements)

References 81 publications

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“…Maintenance of ion homeostasis and enough nutrients are critically important for plants to preserve their structure and vital physiological activities under salinity stress [ 10 ]. Exposure of sunflower seedlings to 150 mM NaCl induced excessive Na + accumulation and K + insufficiency resulting in an increased Na + /K + ratio, and reduced levels of Ca 2+ , Mg 2+ , and P. This disturbed ion homeostasis in response to NaCl exposure has been previously reported in other crops [ 38 , 47 , 51 , 54 ]. The result could be attributed to the antagonistic impact of Na + on K + binding sites of the root plasma membranes [ 55 ], salinity-induced plasma membrane depolarization-initiated K + leak [ 47 , 56 ], the competitive uptake of Na + and Cl − with Ca 2+ , Mg 2+ , and P nutrients in the root plasma membranes [ 57 ], resulting in essential nutrient deficiency and elevated toxic ions.…”

Section: Discussionsupporting

confidence: 61%

“…One of the most negative impacts of salinity stress is the reduction in plant growth and productivity despite the escalating demand for food all over the world [ 13 , 36 ]. NaCl-induced growth reduction in sunflower seedlings observed in this study was most probably resulted from Na + toxicity [ 36 , 37 ], declined essential nutrient elements [ 38 – 40 ], reduced water absorption resulting from osmotic stress [ 41 ], and/or high ROS production [ 40 , 42 , 43 ]. These salinity-hazardous impacts adversely affect crop species by impairing various physiological, biochemical, and molecular processes which were reflected in growth and yield reduction [ 16 , 40 , 43 , 44 ].…”

Section: Discussionmentioning

confidence: 99%

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Hydrogen sulfide priming enhanced salinity tolerance in sunflower by modulating ion hemostasis, cellular redox balance, and gene expression

Younis,

Mansour

2023

BMC Plant Biol

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Background The salinity threat represents an environmental challenge that drastically affects plant growth and yield. Besides salinity stress, the escalating world population will greatly influence the world’s food security in the future. Therefore, searching for effective strategies to improve crop salinity resilience and sustain agricultural productivity under high salinity is a must. Seed priming is a reliable, simple, low-risk, and low-cost technique. Therefore, this work aimed to evaluate the impact of seed priming with 0.5 mM NaHS, as a donor of H2S, in mitigating salinity effects on sunflower seedlings. Primed and nonprime seeds were established in nonsaline soil irrigated with tape water for 14 d, and then exposed to 150 mM NaCl for 7 d. Results Salinity stress significantly reduced the seedling growth, biomass accumulation, K+, Ca2+, and salinity tolerance index while elevating Na+ uptake and translocation. Salinity-induced adverse effects were significantly alleviated by H2S priming. Upregulation in gene expression (HaSOS2, HaGST) under NaCl stress was further enhanced by H2S priming. Also, H2S reduced lipid peroxidation, electrolyte leakage, and H2O2 content, but elevated the antioxidant defense system. NaCl-induced levels of ascorbate, glutathione, and α tocopherol, as well as the activities of AsA-GSH cycle enzymes: ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, glutathione reductase, and glutathione S-transferase, were further enhanced by H2S priming. Increased level of H2S and total thiol by NaCl was also further stimulated by H2S priming. Conclusion H2S priming has proved to be an efficient strategy to improve sunflower seedlings’ salinity tolerance by retaining ion homeostasis, detoxifying oxidative damage, modulating gene expression involved in ion homeostasis and ROS scavenging, and boosting endogenous H2S. These findings suggested that H2S acts as a regulatory molecule activating the functional processes responsible for sunflower adaptive mechanisms and could be adopted as a crucial crop management strategy to combat saline conditions. However, it would be of great interest to conduct further studies in the natural saline field to broaden our understanding of crop adaptive mechanisms and to support our claims.

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Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Hydrogen sulfide priming enhanced salinity tolerance in sunflower by modulating ion hemostasis, cellular redox balance, and gene expression

Younis,

Mansour

2023

BMC Plant Biol

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“…One of the most negative impacts of salinity stress is the reduction in plant growth and productivity despite the escalating demand for food all over the world [10,31]. NaCl-induced growth reduction in sun ower seedlings observed in this study was most probably resulted from Na + toxicity [32,33], declined essential nutrient elements [33][34][35], reduced water absorption resulting from osmotic stress [36], and/or high ROS production [35,37,38]. These salinity-hazardous impacts adversely affect crop species by impairing various physiological, biochemical, and molecular processes which were re ected in growth and yield reduction [35,[38][39][40].…”

Section: Discussionmentioning

confidence: 72%

“…Maintenance of ion homeostasis and enough nutrients are critically important for plants to preserve their structure and vital physiological activities under salinity stress [8]. Exposure of sun ower seedlings to 150 mM NaCl induced excessive Na + accumulation and K + insu ciency resulting in an increased Na + /K + ratio, and reduced levels of Ca 2+ , Mg 2+ , and P. This disturbed ion homeostasis in response to NaCl exposure has been previously reported in other crops [33,37,49,50]. The result could be attributed to the antagonistic impact of Na + on K + binding sites of the root plasma membranes [51], salinity-induced plasma membrane depolarization-initiated K + leak [37,52], the competitive uptake of Na + and Cl − with Ca 2+ , Mg 2+ , and P nutrients in the root plasma membranes [53], resulting in essential nutrient de ciency and elevated toxic ions.…”

Section: Discussionmentioning

confidence: 86%

Hydrogen sulfide priming enhanced salinity tolerance in sunflower by modulating ion hemostasis, cellular redox balance, and gene expression

Younis,

Mansour

2023

Preprint

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Background The salinity threat represents one of the environmental challenges that drastically affect plant growth and yield. Besides salinity stress, the escalating world population will greatly influence the world’s food security in the future. Therefore, searching for effective strategies to improve crop salinity resilience and sustain agricultural productivity under high salinity is a must. Seed priming is a reliable, simple, low-risk, and low-cost technique. Therefore, this work aimed to evaluate the impact of seed priming with 0.5 mM NaHS, as a donor of H2S, in mitigating salinity effects on sunflower seedlings. Primed and nonprime seeds were established in nonsaline soil irrigated with tape water for 14 d, and then exposed to 150 mM NaCl for 7 d. Results Salinity stress significantly reduced the seedling growth, biomass accumulation, K+, Ca2+, and salinity tolerance index while elevating Na+ uptake and translocation. Salinity-induced adverse effects were significantly alleviated by H2S priming. Upregulation in gene expression (HaSOS2, HaGST) under NaCl stress was further enhanced by H2S priming. Also, H2S reduced lipid peroxidation, electrolyte leakage, and H2O2 content, but elevated the antioxidant defense system. NaCl-induced levels of ascorbate, glutathione, and α tocopherol, as well as the activities of AsA-GSH cycle enzymes: ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, glutathione reductase, and glutathione S-transferase, were further enhanced by H2S priming. Increased level of H2S and total thiol by NaCl was also further stimulated by H2S priming. Conclusion H2S priming has proved to be an efficient strategy to improve sunflower seedlings’ salinity tolerance by retaining ion homeostasis, detoxifying oxidative damage, modulating gene expression involved in ion homeostasis and ROS scavenging, and boosting endogenous H2S. These findings suggested that H2S acts as a regulatory molecule activating the functional processes responsible for sunflower adaptive mechanisms and could be adopted as a crucial crop management strategy to combat saline conditions.

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“…Carbohydrates are a significant category of compatible solutes that include polyols (myo‐inositol, inositol, mannitol), hexoses (fructose and glucose) and disaccharides (sucrose). Among the amino acids, proline is considered to be the most efficient and abundant compatible solute, whose synthesis can be dramatically enhanced by salt stress (Peña Calzada et al, 2023). The γ‐aminobutyric acid (GABA) is a non‐protein amino acid that also accumulates in many plant species in response to environmental stress, performing a dual function during salinity, acting as both an energy‐providing metabolite and a carbon source to feed an alternative route for the Krebs cycle (Dabravolski and Isayenkov, 2023).…”

Section: Introductionmentioning

confidence: 99%

The synergy of halotolerant PGPB and mauran mitigates salt stress in tomato (Solanum lycopersicum) via osmoprotectants accumulation

Sánchez,

Castro‐Cegrí,

Sierra

et al. 2023

Physiologia Plantarum

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Salinity stress is one of the major abiotic factors limiting sustainable agriculture. Halotolerant plant growth‐promoting bacteria (PGPB) increased salt stress tolerance in plants, but the mechanisms underlying the tolerance are poorly understood. This study investigated the PGP activity of four halotolerant bacteria under salinity stress and the tomato salt‐tolerance mechanisms induced by the synergy of these bacteria with the exopolysaccharide (EPS) mauran. All PGPB tested in this study were able to offer a significant improvement of tomato plant biomass under salinity stress; Peribacillus castrilensis N3 being the most efficient one. Tomato plants treated with N3 and the EPS mauran showed greater tolerance to NaCl than the treatment in the absence of EPS and PGPB. The synergy of N3 with mauran confers salt stress tolerance in tomato plants by increasing sodium transporter genes' expression and osmoprotectant content, including soluble sugars, polyols, proline, GABA, phenols and the polyamine putrescine. These osmolytes together with the induction of sodium transporter genes increase the osmotic adjustment capacity to resist water loss and maintain ionic homeostasis. These findings suggest that the synergy of the halotolerant bacterium N3 and the EPS mauran could enhance tomato plant growth by mitigating salt stress and could have great potential as an inductor of salinity tolerance in the agriculture sector.

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Regulatory Role of Silicon on Growth, Potassium Uptake, Ionic Homeostasis, Proline Accumulation, and Antioxidant Capacity of Soybean Plants Under Salt Stress

Cited by 16 publications

References 81 publications

Hydrogen sulfide priming enhanced salinity tolerance in sunflower by modulating ion hemostasis, cellular redox balance, and gene expression

Hydrogen sulfide priming enhanced salinity tolerance in sunflower by modulating ion hemostasis, cellular redox balance, and gene expression

Hydrogen sulfide priming enhanced salinity tolerance in sunflower by modulating ion hemostasis, cellular redox balance, and gene expression

The synergy of halotolerant PGPB and mauran mitigates salt stress in tomato (Solanum lycopersicum) via osmoprotectants accumulation

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