Abstract
BACKGROUND: Grape berries produce significant amounts of phenolic compounds. These are an essential qualitative factor due to their nutritional value and effect on berry color and texture. Salicylic acid (SA) and its derivatives usually lead to enhancement of phenolic content in plant tissues. The present study was conducted to evaluate the effect of different levels of SA (0.0, 50.0, 100.0, and 200.0 mM) on the production of phenolic compounds and the derivatives (anthocyanin and flavonoid) in the grape berries, with emphasis on malvidin-3-O-β glucoside as a regular anthocyanin in red grapes. RESULT: The results showed that total phenolics content were significantly enhanced in SA-treated (100.0 and 200.0 mM) berries compared to untreated ones. Salicylic acid treatment at all concentrations considerably improved the anthocyanin content in the berries and, compared with untreated berries, the accumulation of malvidin-3-O-β glucoside was higher in SA-treated fruits. In particular, the 200.0 mM concentration caused approximately two times more malvidin-3-O-β glucoside than the control. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging capacity of the fruits treated with SA were significantly higher than those of the untreated berries. The activity of phenylalanine ammonia-lyase (PAL) in SA treated fruits significantly increased as compared with the untreated clusters. CONCLUSION: A general evaluation of the current results leads us to the conclusion that SA is a suitable and recommendable treatment for improving and increasing the phenolic and antioxidant capacity of grape berries. Spraying grape berries at pre-véraison stage with SA could therefore be a convenient strategy to increase quality and nutritional value of grape berries considerably. © 2019 Society of Chemical Industry.
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Claims 6
Claim · model-written summary
Salicylic acid at 100.0 and 200.0 mM significantly increased berry total phenolics relative to untreated berries.
Verbatim
e0“total phenolics content were significantly enhanced in SA-treated (100.0 and 200.0 mM) berries compared to untreated ones”
t0“grape (Vitis vinifera L.)”
Claim · model-written summary
Salicylic acid at all concentrations increased berry anthocyanin content.
- Taxon
- grapet0
- Treatment
- Salicylic acid treatment at all concentrationse0
- Outcome
- anthocyanin contente0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“Salicylic acid treatment at all concentrations considerably improved the anthocyanin content in the berries”
t0“grape (Vitis vinifera L.)”
Claim · model-written summary
Salicylic acid increased malvidin-3-O-β glucoside accumulation, with about twice as much at 200.0 mM as in controls.
Verbatim
e0“compared with untreated berries, the accumulation of malvidin-3-O-β glucoside was higher in SA-treated fruits. In particular, the 200.0 mM concentration caused approximately two times more malvidin-3-O-β glucoside than the control”
t0“grape (Vitis vinifera L.)”
Claim · model-written summary
Salicylic acid significantly increased fruit DPPH scavenging capacity.
Verbatim
e0“The 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging capacity of the fruits treated with SA were significantly higher than those of the untreated berries”
t0“grape (Vitis vinifera L.)”
Claim · model-written summary
Salicylic acid significantly increased phenylalanine ammonia-lyase activity.
Verbatim
e0“The activity of phenylalanine ammonia-lyase (PAL) in SA treated fruits significantly increased as compared with the untreated clusters”
t0“grape (Vitis vinifera L.)”
Claim · model-written summary
The authors recommend pre-véraison salicylic acid spraying to improve grape berry quality and nutritional value.
Verbatim
e0“Spraying grape berries at pre-véraison stage with SA could therefore be a convenient strategy to increase quality and nutritional value of grape berries considerably”
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