QUALITY OF STRAWBERRY (Fragaria x ananassa Duch.) FRUITS FROM PLANTS CULTIVATED UNDER COLORED SHADE NETS | QUALITY OF STRAWBERRY (Fragaria x ananassa Duch.) FRUITS FROM PLANTS CULTIVATED UNDER COLORED SHADE NETS

إنجليزي. Strawberry (Fragaria x ananassa Duch.) fruit has a high demand worldwide for its organoleptic and nutraceutical properties that are beneficial to human health. Colored shade nets alter the light quality reaching plants, influencing specific physiological reactions and the phytochemical composition of fruits. The present study aimed to investigate how different photoselective shade nets (black, 288 photosynthetically active radiation (PAR); blue, 429 PAR; green, 271 PAR; and beige, 519 PAR) affect the physical and biochemical quality of strawberry fruits cv. Albion. The study was conducted in a glass greenhouse in the spring-winter season of 2022. Strawberry seedlings were placed in 5-L containers in an open soilless system. A completely randomized experimental design was used, with four treatments and a control (973 PAR), with nine replicates; the experimental unit consisted of one plant per pot. The concentration of total soluble sugars, total soluble solids (TSS), phenolic compounds, anthocyanins, flavonoids, ascorbic acid, and antioxidant capacity were evaluated; as well as titratable acidity (TA), pH, and TSS/TA ratio. The results showed that the fruit’s response was influenced by the color of the net. Fruits from plants grown under the blue and beige nets had 42 % higher total soluble sugars, while those under blue nets had 86 % more anthocyanins compared to the control plants. TSS values were similar in the control fruits and blue and beige nets. The fruits harvested from the beige net showed an increase of 24 % in TA and 4 % more phenolic compounds than the control. The blue and beige nets could serve as an alternate production strategy to enhance the physical and biochemical parameters of strawberry fruits.

الأسبانية؛ قشتالية. Strawberry (Fragaria x ananassa Duch.) fruit has a high demand worldwide for its organoleptic and nutraceutical properties that are beneficial to human health. Colored shade nets alter the light quality reaching plants, influencing specific physiological reactions and the phytochemical composition of fruits. The present study aimed to investigate how different photoselective shade nets (black, 288 photosynthetically active radiation (PAR); blue, 429 PAR; green, 271 PAR; and beige, 519 PAR) affect the physical and biochemical quality of strawberry fruits cv. Albion. The study was conducted in a glass greenhouse in the spring-winter season of 2022. Strawberry seedlings were placed in 5-L containers in an open soilless system. A completely randomized experimental design was used, with four treatments and a control (973 PAR), with nine replicates; the experimental unit consisted of one plant per pot. The concentration of total soluble sugars, total soluble solids (TSS), phenolic compounds, anthocyanins, flavonoids, ascorbic acid, and antioxidant capacity were evaluated; as well as titratable acidity (TA), pH, and TSS/TA ratio. The results showed that the fruit’s response was influenced by the color of the net. Fruits from plants grown under the blue and beige nets had 42 % higher total soluble sugars, while those under blue nets had 86 % more anthocyanins compared to the control plants. TSS values were similar in the control fruits and blue and beige nets. The fruits harvested from the beige net showed an increase of 24 % in TA and 4 % more phenolic compounds than the control. The blue and beige nets could serve as an alternate production strategy to enhance the physical and biochemical parameters of strawberry fruits.