Changes in Amino Acid Accumulation and Nitrogen, Phosphorus, and Potassium Concentrations in Leaves of Date Palm (Phoenix dactylifera L.) Seedlings Exposed to UV Light Stress

• Published in: IOP conference series. Earth and environmental science 2024-07, Vol.1371 (4), p.42063
• Main Authors: Swaid, Sajeda Y., Ali, Abdulminam H.
• Format: Article
• Language: English
• Subjects: Air pollution; Amino acid sequence; Amino acids; Amino acids quantification; Earth surface; Exposure; Hellawi date palm Seedling; Irradiation; Leaf; Leaves; Nitrogen; NPK; Nutrients; Ozone layer; Ozonosphere; Photosynthesis; Seedlings; Seeds; Ultraviolet radiation; UV-B stress
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/1371/4/042063

Human activities have resulted in air pollution, which has reduced the ozone layer. The increased exposure of the Earth’s surface to the harmful ultraviolet B (UV-B) radiation has affected plants, such as date palm, retarding their growth, productivity and photosynthesis. This study aimed to determine how UV-B radiation influences changes in amino acid and nutrients N, P, and K (NPK) content in date palm leaves. Amino acids in germinated seeds subjected to various UV-B doses were quantified, and NPK analysis was performed. Results demonstrated the considerable effects of UV-B radiation on these parameters. Prolonged exposure to UV-B radiation resulted in high amino acid levels, which peaked at 8, 10 h of exposure, and the lowest values were observed after control treatment. The peak in N concentration was recorded after 4 h of exposure and declined at after 8,10 h of exposure. The levels of P increased after 2,4 h of irradiation and decreased after 6, 8 h. By contrast, K content greatly increased after 4 h of UV irradiation and slightly increased after 6,10 h of irradiation. Overall, the amino acid content of the date palm seedlings increased after 6,8 h of exposure to UV-B rays, and NPK levels initially increased after 2, 4 h of UV-B irradiation but decreased after 6,10 h of UV-B irradiation.