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Article

Seed Priming Enhances Seed Germination and Morphological Traits of Lactuca sativa L. under Salt Stress

Department of Plant and Soil Sciences, Mississippi State University, North Mississippi Research and Extension Center, Verona, MS 38879, USA
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Author to whom correspondence should be addressed.
Academic Editors: José Antonio Hernández Cortés, Gregorio Barba-Espín and Pedro Diaz-Vivancos
Seeds 2022, 1(2), 74-86; https://doi.org/10.3390/seeds1020007
Received: 2 March 2022 / Revised: 24 March 2022 / Accepted: 29 March 2022 / Published: 1 April 2022
(This article belongs to the Special Issue Seed Priming Approaches That Achieve Environmental Stress Tolerance)
Seed germination is the stage in which plants are most sensitive to abiotic stress, including salt stress (SS). SS affects plant growth and performance through ion toxicity, decreasing seed germination percentage and increasing the germination time. Several priming treatments were used to enhance germination under SS. The objectives of this study were (1) to identify priming treatments to shorten the emergence period, (2) to evaluate priming treatments against the SS, and (3) to induce synchronized seed germination. Salt-sensitive ‘Burpee Bibb’ lettuce seeds were treated with 0.05% potassium nitrate, 3 mM gibberellic acid, and distilled water. All the primed and non-primed seeds were subjected to 100 mM sodium chloride (NaCl) or 0 mM NaCl (control). The seven-day experiment, arranged in a complete randomized block design with four replications, was conducted in a growth chamber maintained with 16/8 h photoperiod (light/dark), 60% relative humidity, and a day/night temperature of 22/18 °C. The result indicated that hydro-primed (HP) seeds were better synchronized under SS. Similarly, fresh mass (FM) and dry mass (DM) of cotyledon, hypocotyl, and radicle were the highest in HP lettuce regardless of SS. Electrolyte leakage was the lowest in the HP lettuce, while other priming methods under SS increased membrane permeability, leading to osmotic stress and tissue damage. Overall, hydro-priming can be a good priming method for synchronizing germination and increasing FM and DM by creating the least osmotic stress and ion toxicity in lettuce under SS. View Full-Text
Keywords: hydro-priming; lettuce; sodium chloride; synchronization; electrolyte leakage hydro-priming; lettuce; sodium chloride; synchronization; electrolyte leakage
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MDPI and ACS Style

Adhikari, B.; Olorunwa, O.J.; Barickman, T.C. Seed Priming Enhances Seed Germination and Morphological Traits of Lactuca sativa L. under Salt Stress. Seeds 2022, 1, 74-86. https://doi.org/10.3390/seeds1020007

AMA Style

Adhikari B, Olorunwa OJ, Barickman TC. Seed Priming Enhances Seed Germination and Morphological Traits of Lactuca sativa L. under Salt Stress. Seeds. 2022; 1(2):74-86. https://doi.org/10.3390/seeds1020007

Chicago/Turabian Style

Adhikari, Bikash, Omolayo J. Olorunwa, and T. C. Barickman. 2022. "Seed Priming Enhances Seed Germination and Morphological Traits of Lactuca sativa L. under Salt Stress" Seeds 1, no. 2: 74-86. https://doi.org/10.3390/seeds1020007

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