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Article

Thermopriming Induces Time-Limited Tolerance to Salt Stress

by
Tobias Körner
,
Jana Zinkernagel
and
Simone Röhlen-Schmittgen
*
Department of Vegetable Crops, Hochschule Geisenheim University, 65366 Geisenheim, Germany
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2024, 25(14), 7698; https://doi.org/10.3390/ijms25147698
Submission received: 12 June 2024 / Revised: 7 July 2024 / Accepted: 10 July 2024 / Published: 13 July 2024

Abstract

Implementing sustainable crop protection practices is crucial to protect global harvests and ensure high-quality food supplies. While priming is an established method in seed production for the fortification of plants against various stresses, it is not yet a standard practice in transplant cultivation. Thus, we evaluated the long-term effects of thermopriming—a heat-based priming technique—on the growth, development, and fruit yield of tomato plants. Following a recovery period of about six weeks for thermoprimed plants without stress inducers, we subjected them to subsequent salt stress to ascertain the persistence of the priming effects. Additionally, we compared the efficacy of thermopriming with benzothiadiazole (BTH), a chemical elicitor, in enhancing plant resilience to abiotic stress. While BTH application negatively impacted both plant growth and fruit health, thermopriming showed no such adverse effects on these parameters. Instead, thermopriming initially enhanced the plant defense mechanisms by increasing the accumulation of protective phenols and flavonoids in the leaves. Interestingly, while thermopriming did not alter the response to salt stress, it notably strengthened the overall resilience of the plants. Our findings underscore both the potential and temporal constraints of thermopriming memory. Nonetheless, primed plants exhibited temporarily increased stress tolerance, offering a means to safeguard the offspring.
Keywords: abiotic stress; Solanum lycopersicum; plant growth; plant development; fruit yield; climate change; food security; sustainable plant protection; benzothiadiazole abiotic stress; Solanum lycopersicum; plant growth; plant development; fruit yield; climate change; food security; sustainable plant protection; benzothiadiazole

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MDPI and ACS Style

Körner, T.; Zinkernagel, J.; Röhlen-Schmittgen, S. Thermopriming Induces Time-Limited Tolerance to Salt Stress. Int. J. Mol. Sci. 2024, 25, 7698. https://doi.org/10.3390/ijms25147698

AMA Style

Körner T, Zinkernagel J, Röhlen-Schmittgen S. Thermopriming Induces Time-Limited Tolerance to Salt Stress. International Journal of Molecular Sciences. 2024; 25(14):7698. https://doi.org/10.3390/ijms25147698

Chicago/Turabian Style

Körner, Tobias, Jana Zinkernagel, and Simone Röhlen-Schmittgen. 2024. "Thermopriming Induces Time-Limited Tolerance to Salt Stress" International Journal of Molecular Sciences 25, no. 14: 7698. https://doi.org/10.3390/ijms25147698

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