期刊
PLANTS-BASEL
卷 10, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/plants10112346
关键词
Brassica rapa ssp. pekinensis; phenolic compounds; foliar treatment; photosynthetic performance; salicylic acid; ferulic acid; salt stress
资金
- Croatian Science Foundation [IP-2014-09-4359]
- Operational Program Competitiveness and Cohesion 2014-2020
- European regional fund under the specific Scheme Scheme to strengthening applied research in proposing actions for climate change adaptation [KK.05.1.1.02.0005]
Salinity stress causes disturbances in physiological, biochemical, and metabolic processes in plants, but the exogenous application of natural metabolites like salicylic acid and ferulic acid can reduce the adverse effects on crops. During the study, it was found that ferulic acid had a better ameliorative effect on salt stress compared to salicylic acid, increasing antioxidant activities and improving photosynthetic performance.
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 mu M) 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 mu M, 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.
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