Salicylic Acid Modulates Okra Tolerance to Salt Stress in Hydroponic System

Allysson Jonhnny Torres Mendonça, André Alisson Rodrigues da Silva, Geovani Soares de Lima (), Lauriane Almeida dos Anjos Soares, Valeska Karolini Nunes Oliveira, Hans Raj Gheyi, Claudivan Feitosa de Lacerda, Carlos Alberto Vieira de Azevedo, Vera Lúcia Antunes de Lima and Pedro Dantas Fernandes
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Allysson Jonhnny Torres Mendonça: 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
Valeska Karolini Nunes Oliveira: Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande 58430-380, 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
Vera Lúcia Antunes de Lima: 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

Agriculture, 2022, vol. 12, issue 10, 1-24

Abstract: Salinity is one of the most devastating abiotic stresses that limit plant growth and yield, especially in arid and semi-arid regions. The objective of this study was to evaluate the effect of foliar application of salicylic acid in mitigating the effects of salt stress on okra cultivation in a hydroponic system. The study was conducted in a greenhouse, consisting of two experiments. A completely randomized design was adopted in a split-plot scheme, with four levels of electrical conductivity of the nutrient solution—EC (2.1; 3.6; 5.1, and 6.6 dS m −1 ) considered the plots and four salicylic acid concentrations—SA (0, 1.2; 2.4, and 3.6 mM), the subplots, with four replications. The second experiment differed from the first only by the increase in the EC levels (3.0, 5.0, 7.0, and 9.0 dS m −1 ). An increase in the electrical conductivity of the nutrient solution negatively affected the physiology and production components of okra. However, foliar application of salicylic acid at concentrations between 1.2 and 2.3 mM reduced the harmful effects of salt stress. The salinity threshold for hydroponic cultivation of okra was 2.54 dS m −1 , with a reduction of 7.98% per unit increment in EC above this level.

Keywords: Abelmoschus esculentus; saline 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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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