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Article

Ferulic Acid and Salicylic Acid Foliar Treatments Reduce Short-Term Salt Stress in Chinese Cabbage by Increasing Phenolic Compounds Accumulation and Photosynthetic Performance

1
Department for Molecular Biology, Ruđer Bošković Institute, 10 000 Zagreb, Croatia
2
Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, 52 440 Poreč, Croatia
3
Department of Biology, Josip Juraj Strossmayer University of Osijek, 31 000 Osijek, Croatia
4
Department for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, 10 000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Domenico Trombetta
Plants 2021, 10(11), 2346; https://doi.org/10.3390/plants10112346
Received: 29 September 2021 / Revised: 22 October 2021 / Accepted: 27 October 2021 / Published: 29 October 2021
(This article belongs to the Special Issue Plant Polyphenols - from Plants to Human Health Volume II)
Salinity stress is one of the most damaging abiotic stresses to plants, causing disturbances in physiological, biochemical, and metabolic processes. The exogenous application of natural metabolites is a useful strategy to reduce the adverse effects of stress on crops. We investigated the effect of foliar application of salicylic acid (SA) and ferulic acid (FA) (10–100 μM) on short-term salt-stressed (150 mM NaCl, 72 h) Chinese cabbage plants. Subsequently, proline level, photosynthetic performance, phenolic metabolites with special focus on selected phenolic acids (sinapic acid (SiA), FA, SA), flavonoids (quercetin (QUE), kaempferol (KAE)), and antioxidant activity were investigated in salt-stressed and phenolic acid-treated plants compared with the corresponding controls. Salt stress caused a significant increase in SA and proline contents, a decrease in phenolic compounds, antioxidant activity, and photosynthetic performance, especially due to the impairment of PSI function. SA and FA treatments, with a concentration of 10 μM, had attenuated effects on salt-stressed plants, causing a decrease in proline and SA level, and indicating that the plants suffered less metabolic disturbance. Polyphenolic compounds, especially FA, SiA, KAE, and QUE, were increased in FA and SA treatments in salt-stressed plants. Consequently, antioxidant activities were increased, and photosynthetic performances were improved. FA resulted in a better ameliorative effect on salt stress compared to SA. View Full-Text
Keywords: Brassica rapa ssp. pekinensis; phenolic compounds; foliar treatment; photosynthetic performance; salicylic acid; ferulic acid; salt stress Brassica rapa ssp. pekinensis; phenolic compounds; foliar treatment; photosynthetic performance; salicylic acid; ferulic acid; salt stress
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MDPI and ACS Style

Linić, I.; Mlinarić, S.; Brkljačić, L.; Pavlović, I.; Smolko, A.; Salopek-Sondi, B. Ferulic Acid and Salicylic Acid Foliar Treatments Reduce Short-Term Salt Stress in Chinese Cabbage by Increasing Phenolic Compounds Accumulation and Photosynthetic Performance. Plants 2021, 10, 2346. https://doi.org/10.3390/plants10112346

AMA Style

Linić I, Mlinarić S, Brkljačić L, Pavlović I, Smolko A, Salopek-Sondi B. Ferulic Acid and Salicylic Acid Foliar Treatments Reduce Short-Term Salt Stress in Chinese Cabbage by Increasing Phenolic Compounds Accumulation and Photosynthetic Performance. Plants. 2021; 10(11):2346. https://doi.org/10.3390/plants10112346

Chicago/Turabian Style

Linić, Ida, Selma Mlinarić, Lidija Brkljačić, Iva Pavlović, Ana Smolko, and Branka Salopek-Sondi. 2021. "Ferulic Acid and Salicylic Acid Foliar Treatments Reduce Short-Term Salt Stress in Chinese Cabbage by Increasing Phenolic Compounds Accumulation and Photosynthetic Performance" Plants 10, no. 11: 2346. https://doi.org/10.3390/plants10112346

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