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Effect of Foliar Spray of Phenylalanine on Improvement of Qualitative and Biochemical Fruit Traits of Pomegranate (Punica granatum L.) Cultivar ‘Rabab-e Neyriz’
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Esmaeil Sadeghi   , Mesbah Babalar , Mohammad Ali Askari Sarcheshmeh , Mohammad Reza Fattahi Moghaddam |
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Abstract: (324 Views) |
Pomegranate fruit is a rich source of various bioactive compounds such as polyphenols, anthocyanins, tannins, and flavonoids. In recent years, the use of amino acids is considered as an effective and safe method to increase the nutritional quality of agricultural crops. Therefore, this research was conducted with the aim of improving the nutritional value of pomegranate fruits cultivar Rabab-e Neyriz through foliar spray of the phenylalanine amino acid. The study was carried out on 15-year-old Rabab-e Neyriz pomegranate trees in a randomized complete block design with three replications in a commercial orchard at Neyriz city, Fars province, during two years 2019 and 2020. The phenylalanine amino acid treatment was applied as foliar spray at 0, 1, 5, and 10 mM concentrations in the pre-harvest stage (20, 40 and 60 days before harvest). The results showed that the amount of soluble solids, titratable acidity and vitamin C increased with the use of phenylalanine compared to the control. In addition, phenylalanine treatment increased PAL enzyme activity (45.26% compared to the control), which due to the role of this enzyme in the phenylpropanoid pathway, can be responsible for the increase of total phenol (24.97% compared to the control), total flavonoid (44.89% compared to the control) and total anthocyanin (58.57% compared to the control) in the treated fruits with phenylalanine. The findings of this study, showed that foliar spraying with the phenylalanine amino acid in the pre-harvest stage, particularly at concentrations of 5 and 10 mM, can enhance the nutritional quality of pomegranate fruits by improving the qualitative and biochemical parameters. Therefore, phenylalanine as a Biostimulant can act as a suitable strategy to improve the nutritional quality of pomegranate fruit in orchards. |
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| Keywords: Anthocyanin, Amino acid, Flavonoid, Phenylalanine |
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Full-Text [PDF 502 kb]
(78 Downloads)
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Type of Study: Research |
Subject:
Pomology
Received: 2023/11/25 | Accepted: 2024/04/6 | Published: 2025/03/10
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