Foliar Application of Salicylic Acid Mitigates Saline Stress on Physiology, Production, and Post-Harvest Quality of Hydroponic Japanese Cucumber

Valeska Karolini Nunes Oliveira, André Alisson Rodrigues da Silva, Geovani Soares de Lima (), Lauriane Almeida dos Anjos Soares, Hans Raj Gheyi, Claudivan Feitosa de Lacerda, Carlos Alberto Vieira de Azevedo, Reginaldo Gomes Nobre, Lúcia Helena Garófalo Chaves, Pedro Dantas Fernandes and Vera Lúcia Antunes de Lima
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Valeska Karolini Nunes Oliveira: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil
André Alisson Rodrigues da Silva: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil
Geovani Soares de Lima: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil
Lauriane Almeida dos Anjos Soares: Academic Unit of Agrarian Sciences, Federal University of Campina Grande, Pombal 58840-000, PB, Brazil
Hans Raj Gheyi: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil
Claudivan Feitosa de Lacerda: Department of Agricultural Engineering, Federal University of Ceará, Fortaleza 60455-760, CE, Brazil
Carlos Alberto Vieira de Azevedo: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil
Reginaldo Gomes Nobre: Department of Science and Technology, Federal Rural University of the Semi-Arid, Caraúbas 59780-000, RN, Brazil
Lúcia Helena Garófalo Chaves: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil
Pedro Dantas Fernandes: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil
Vera Lúcia Antunes de Lima: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, PB, Brazil

Agriculture, 2023, vol. 13, issue 2, 1-24

Abstract: Salicylic acid (SA) is a phenolic compound capable of inducing physiological and metabolic changes that enhance the tolerance of plants to saline stress associated with using a hydroponic system and enable the use of saline water in semi-arid regions. In this context, this assay aimed to evaluate the impact of the foliar application of SA on mitigating salt stress effects on Japanese cucumber cultivated in a hydroponic system. The experiment was carried out in a protected ambient (greenhouse), using the Nutrient Film Technique—NFT hydroponic system. A completely randomized design was performed in a 4 × 4 split-plot scheme, with four levels of electrical conductivity of the nutrient solution—ECns (2.1, 3.6, 5.1, and 6.6 dS m −1 )—considered as plots and four SA concentrations (0, 1.8, 3.6, and 5.4 mM), regarded as subplots, with four replicates and two plants per plot. An increase in the ECns negatively affected the physiology, production components, and post-harvest quality of cucumber. However, the application of SA to leaves at concentrations between 1.4 and 2.0 mM reduced the deleterious effects of saline stress and promoted an increase in the production of and improvement in the post-harvest quality of cucumber fruits.

Keywords: Cucumis sativus L.; brackish water; soilless cultivation; phytohormone (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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