PJB-2024-390
Improvement of antioxidant and phytochemical properties of Goji berry (Lycium barbarum L.) under application of L-phenylalanine, selenium and nitroxin biofertilizer
Vali Rabiei
Abstract
Lycium berries can be a source of natural antioxidants for human food production. To study effect of the amino acid L-phenylalanine, sodium selenate or nitroxine on increasing the antioxidant activity of secondary metabolites in goji berry seedlings, an experiment was conducted were carried out at the research farm in Mashhad University, Iran. The results revealed that treatments used in this experiment had a significant effect on the physiological and chemical attributes of Goji berry plants. The application of phenylalanine, selenium, and nitroxine increased photosynthetic pigments including chlorophyll and carotenoid, antioxidant, and catalase during two years of foliar application and the results showed that phenylalanine with selenium improved and increased the amount of flavonoid, anthocyanin, and carbohydrate in Goji berry plants. The application of phenylalanine alone had a positive and much greater effect on the amount of phenylalanine ammonia-lyase enzyme, which shows the effect of this substance on phenylpropanoid pathway, and together with nitroxine, it had a significant effect on the amount of phenol and superoxide dismutase enzyme. According to the results of this experiment, during the two years of 2021 and 2022, phenylalanine had a significant effect on antioxidant enzymes activity and other traits. However, in this experiment, the use of phenylalanine and sodium selenate at low concentration had a positive impact on all antioxidant compounds (enzymatic and non-enzymatic) and improved plant growth.
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