What is already known on this subject?• Salicylic acid plays a key role in the plant response to environmental stress, which can improve the growth and development of a variety of plants under salt stress, and has the potential to become an effective measure to manage plant salt tolerance.• Salicylic acid can indeed improve tolerance of Hosta ensata to salt stress, and this effect may be achieved through regulation of photosynthetic system, osmoregulation system and antioxidant system.What is the expected impact on horticulture?• The results of this study can prove that the application of exogenous salicylic acid is an effective measure to improve the salt tolerance of Hosta ensata, and can provide a reference for the application of salicylic acid in horticultural plant cultivation.
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