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Improvement of the antioxidant potential: impact of drying and extraction techniques on polyphenols in Arbutus unedo L. leaf aqueous extract Zemour, Kamel; Chouhim, Kadda Mohamed Amine; Labdelli, Amina; Mairif, Mohamed; Ardjane, Tedj Eddine Adda; Moussaoui, Badreddine; Zemour, Hafidh; Laafer, Mohammed
Journal of Agriculture and Applied Biology Vol 5 No 1 (2024): Journal of Agriculture and Applied Biology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jaab.05.01.03

The search for alternatives to chemical pharmaceutical products remains an urgent and crucial step for humanity. In this regard, the use of plants presents an ideal approach for such biological studies. Arbutus unedo L., which belongs to the family Ericaceae, is one of the species that holds significant importance in traditional pharmaceutical uses. In Algeria, the use of this species in traditional treatment is generally rare. Therefore, this study aims to highlight its medicinal importance and the proper method for extracting its bioactive elements. To achieve this, the biological activity of leaves including total phenolic content (TPC), DPPH assay, and total flavonoid content (TFC), were assessed under four different drying temperatures (shade-drying, sun-drying, 40°C and 60C°) and two extraction methods after maceration (centrifugation, filtration). The results have indicated that these processes have affected the final accumulation of polyphenols and antioxidant activity in the leaf extracts. Additionally, it has been highlighted that the centrifugation method extracts a higher biochemical amount, especially after drying at 40°C. Furthermore, Arbutus unedo L. leaves should be considered a promising source of natural compounds to be used as ingredients in various fields.

Morphological, physiological and anatomical traits in durum wheat (Triticum durum Desf.) as affected by semi-arid conditions Ali, Arous; Zemour, Kamel; Mehdeb, Djamila; Labdelli , Amina; Zemour , Hafidh; Chouhim , Kada Mohamed Amine; Adda , Ahmed; Belkhoudja , Moulay
Journal of Agriculture and Applied Biology Vol 5 No 1 (2024): Journal of Agriculture and Applied Biology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jaab.05.01.08

Durum wheat (Triticum durum Desf.) is one of Algeria's primary cereal crops. Although the areas reserved for this species are estimated at approximately 40%, the production remains low to meet national grain requirements. This shortfall is primarily due to the impact of biotic and abiotic stresses, particularly drought, which significantly limit wheat yields. For that, this study assessed the behavior of five genotypes of durum wheat (Waha, Acsad1361, Vitron, Oued Zenati and Langlois) under water stress conditions. The experiment was carried out in Tiaret (Western Algeria). The studied parameters are morpho-physiological and anatomical of the flag leaf. The obtained results showed that the water deficit greatly affected the dimensions of the plant and triggered a decrease in the water content. Structural modifications due to cellular resizing of the structural constituents of the last leaf, reflected by variations in the rate of the outer epidermal wall thickness and reductions of leaf mesophiles. These modifications remain effective in maintaining the hydration of the aerial part by limiting water loss and increasing the hydraulic resistance of the leaves. According to this study, it seems that an inter-varietal difference has been highlighted. However, a genetic cross is recommended to combine the maximum number of resistant genes into a single variety. This strategy is considered as an effective solution for mitigating the effects of abiotic stresses, especially in semi-arid regions.

Improvement of the antioxidant potential: impact of drying and extraction techniques on polyphenols in Arbutus unedo L. leaf aqueous extract Zemour, Kamel; Chouhim, Kadda Mohamed Amine; Labdelli, Amina; Mairif, Mohamed; Ardjane, Tedj Eddine Adda; Moussaoui, Badreddine; Zemour, Hafidh; Laafer, Mohammed
Journal of Agriculture and Applied Biology Vol 5 No 1 (2024): Journal of Agriculture and Applied Biology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jaab.05.01.03

The search for alternatives to chemical pharmaceutical products remains an urgent and crucial step for humanity. In this regard, the use of plants presents an ideal approach for such biological studies. Arbutus unedo L., which belongs to the family Ericaceae, is one of the species that holds significant importance in traditional pharmaceutical uses. In Algeria, the use of this species in traditional treatment is generally rare. Therefore, this study aims to highlight its medicinal importance and the proper method for extracting its bioactive elements. To achieve this, the biological activity of leaves including total phenolic content (TPC), DPPH assay, and total flavonoid content (TFC), were assessed under four different drying temperatures (shade-drying, sun-drying, 40°C and 60C°) and two extraction methods after maceration (centrifugation, filtration). The results have indicated that these processes have affected the final accumulation of polyphenols and antioxidant activity in the leaf extracts. Additionally, it has been highlighted that the centrifugation method extracts a higher biochemical amount, especially after drying at 40°C. Furthermore, Arbutus unedo L. leaves should be considered a promising source of natural compounds to be used as ingredients in various fields.

Morphological, physiological and anatomical traits in durum wheat (Triticum durum Desf.) as affected by semi-arid conditions Ali, Arous; Zemour, Kamel; Mehdeb, Djamila; Labdelli , Amina; Zemour , Hafidh; Chouhim , Kada Mohamed Amine; Adda , Ahmed; Belkhoudja , Moulay
Journal of Agriculture and Applied Biology Vol 5 No 1 (2024): Journal of Agriculture and Applied Biology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jaab.05.01.08

Durum wheat (Triticum durum Desf.) is one of Algeria's primary cereal crops. Although the areas reserved for this species are estimated at approximately 40%, the production remains low to meet national grain requirements. This shortfall is primarily due to the impact of biotic and abiotic stresses, particularly drought, which significantly limit wheat yields. For that, this study assessed the behavior of five genotypes of durum wheat (Waha, Acsad1361, Vitron, Oued Zenati and Langlois) under water stress conditions. The experiment was carried out in Tiaret (Western Algeria). The studied parameters are morpho-physiological and anatomical of the flag leaf. The obtained results showed that the water deficit greatly affected the dimensions of the plant and triggered a decrease in the water content. Structural modifications due to cellular resizing of the structural constituents of the last leaf, reflected by variations in the rate of the outer epidermal wall thickness and reductions of leaf mesophiles. These modifications remain effective in maintaining the hydration of the aerial part by limiting water loss and increasing the hydraulic resistance of the leaves. According to this study, it seems that an inter-varietal difference has been highlighted. However, a genetic cross is recommended to combine the maximum number of resistant genes into a single variety. This strategy is considered as an effective solution for mitigating the effects of abiotic stresses, especially in semi-arid regions.

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