Efficacy of seed priming strategies for enhancing salinity tolerance in plants: An overview of the progress and achievements

Biswas, S. N.; Seal, Paulin; Majumder, Barsha; Biswas, Asok

doi:10.1016/j.stress.2023.100186

Cited by 30 publications

(13 citation statements)

References 90 publications

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“…Thus, it is clear that seed halopriming allows for the alleviation of salinity stress through improved ionic equilibrium and water uptake due to K accumulation as well as through reduced Na toxicity and its diverse effects on the cell metabolism. Accordingly, other authors have reported that halopriming can improve the K + /Na + ratio and Ca 2+ absorption under salinity stress, which helps to retain ion homoeostasis, improve seedling growth, increase photosynthetic activity, and reduce electrolyte leakage in crop plants [ 35 ]. In Vigna radiata, halopriming of seeds with 50 mM NaCl and subsequent exposure to the same dose has been reported to facilitate ion adjustments and alter organic acid production [ 36 ].…”

Section: Discussionmentioning

confidence: 99%

Potential of Seed Halopriming in the Mitigation of Salinity Stress during Germination and Seedling Establishment in Durum Wheat (Triticum durum Desf.)

Hmissi,

Krouma,

García-Sánchez

et al. 2023

Plants

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The salinity of soils and irrigation water is among the main factors that limit plant productivity worldwide. Several alternatives have been proposed to get around this problem. However, these alternatives have faced difficulties in their implementation. As an alternative, the adverse effects of salinity on crop yield can be minimized by selecting species and varieties better adapted to salinity and/or by finding priming agents that give plants a certain tolerance during the vegetative and reproductive stages. The latter are strictly dependent on germination and seedling establishment. For this purpose, a laboratory experiment was conducted on three Tunisian wheat cultivars (Karim, Razeg, and Maali) subjected to moderate salinity stress (MSS, 5 g L−1 NaCl), severe salinity stress (SSS, 10 g L−1 NaCl), or control (0 NaCl) after soaking the seeds in a solution of KNO3 or ZnSO4 (0.5 g L−1). Salinity stress significantly decreased germination capacity (GC) and induced osmotic stress under MSS, which declined under SSS in favor of toxic stress. Pretreatment of seeds with KNO3 or ZnSO4 alleviated the toxic effect, and seedlings recovered initial vigor and GC even under SSS. The Karim cultivar showed better tolerance to salinity and a higher ability to react to priming agents. The calculated sensitivity tolerance index (STI) based on germination capacity, seedling growth, and initial vigor decreased in all cultivars under salt stress; however, this parameter clearly discriminated the studied cultivars. Karim was the most tolerant as compared to Razeg and Maali. We conclude that halopriming provides a benefit by alleviating the harmful effects of salt toxicity and that cultivars differ in their response to priming and extent of salt stress. KNO3 and ZnSO4 effectively alleviated the inhibitory effect of salt stress on seed germination and seedling establishment while significantly improving initial vigor.

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Section: Discussionmentioning

confidence: 99%

Potential of Seed Halopriming in the Mitigation of Salinity Stress during Germination and Seedling Establishment in Durum Wheat (Triticum durum Desf.)

Hmissi,

Krouma,

García-Sánchez

et al. 2023

Plants

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“…Seed germination has been considered the most vulnerable stage in a plant’s life cycle, because salt stress can severely hinder seed sprouting and subsequent seedling establishment [ 8 ]. So, rapid seed germination and seedling establishment are vital for plants to survive in a saline environment [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Polyethylene Glycol Priming Enhances the Seed Germination and Seedling Growth of Scutellaria baicalensis Georgi under Salt Stress

Wang,

Li,

Zeng

et al. 2024

Plants

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Seed priming has become a practical pre-sowing strategy to deal with abiotic stresses. This study aims to explore the effects of polyethylene glycol (PEG) priming on seed germination and seedling growth of Scutellaria baicalensis Georgi under salt stress. Regardless of seed priming, salt stress significantly inhibited the seed germination and seedling growth of S. baicalensis. PEG priming significantly alleviates the inhibitory effects of salt stress on seed germination and seedling growth when compared to non-priming and water priming. Among all treatments, PEG priming exhibited the highest germination rate, germination potential, seed vigor index, fresh weight, dry weight, and plant length; the highest contents of proline, soluble sugar, and soluble protein; the highest K+/Na+ ratio and relative water content; the highest antioxidant activities and contents; but the lowest H2O2, malondialdehyde (MDA) content, and relative electrical conductivity in response to salt stress. In addition, PEG priming had the highest transcript levels of antioxidant-related genes among all treatments under NaCl stress. Taken together, the results demonstrated that seed priming with PEG could be recommended as an effective practice to enhance the germination and early seedling growth of S. baicalensis under saline conditions.

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“…Meanwhile, seed priming can lead to a restructuring of transcription and plant metabolism, which could modify the release of metabolites into the rhizosphere, ultimately indirectly influencing the rhizomicrobiome. , It is widely known that the rhizomicrobiome is closely related to the bioavailability and migration of Cd . It can be speculated that priming wheat seeds could potentially affect the absorption of Cd through the regulation of Cd transporters, changes in transcription and plant metabolism, and the recruitment of beneficial microbiota …”

Section: Introductionmentioning

confidence: 99%

Effect of Seed Priming with Cations on Cadmium Accumulation in Wheat Seedings under Cadmium-Contaminated Weakly Alkaline Soil

Ge,

Wang,

et al. 2024

ACS Agric. Sci. Technol.

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Seed soaking is a viable solution for reducing cadmium (Cd) levels in wheat, given the limited options for economically controlling it. This study aimed to explore the precise mechanisms behind seed priming to reduce Cd levels in wheat seedlings via plant ionomics, transcriptomics, and high-throughput sequencing technologies. The results showed that seed soaking with Mn 2+ (100 μM) significantly improved the growth parameters of wheat seedlings. Seed priming with Ag + (1, 2 μM) significantly decreased Cd levels in the roots (32.9 and 40.6%, respectively) and stems (19.4 and 20.3%, respectively), whereas seed priming with Zn 2+ (10 mM) and Mn 2+ (20, 100 μM) significantly decreased Cd levels in the leaves (29.4, 15.6, and 33.5%, respectively) compared to that in the control group. These varied reductions of Cd in wheat seedlings induced by seed soaking were attributed to the restructuring of gene transcription involved in Cd absorption and the recruitment of the genus Rhizopus (plant-beneficial fungi tolerant to Cd) in the rhizosphere soil. It shows that seed soaking could effectively control Cd absorption by wheat in a weakly alkaline soil.

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Efficacy of seed priming strategies for enhancing salinity tolerance in plants: An overview of the progress and achievements

Cited by 30 publications

References 90 publications

Potential of Seed Halopriming in the Mitigation of Salinity Stress during Germination and Seedling Establishment in Durum Wheat (Triticum durum Desf.)

Potential of Seed Halopriming in the Mitigation of Salinity Stress during Germination and Seedling Establishment in Durum Wheat (Triticum durum Desf.)

Polyethylene Glycol Priming Enhances the Seed Germination and Seedling Growth of Scutellaria baicalensis Georgi under Salt Stress

Effect of Seed Priming with Cations on Cadmium Accumulation in Wheat Seedings under Cadmium-Contaminated Weakly Alkaline Soil

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