Antioxidant effects of strawberry fruits at two phenological stages
محورهای موضوعی : مجله گیاهان داروییگیتا امینی 1 , سعید ایریان 2 , احمد مجد 3 , صدیقه مهربان 4
1 - گروه زیست شناسی گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران، ایران؛
2 - گروه زیست شناسی گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران، ایران؛
3 - گروه زیست شناسی گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران، ایران؛
4 - گروه زیست شناسی گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران، ایران؛
کلید واژه: phenolic compounds, antioxidant activity, Fragaria vesca L,
چکیده مقاله :
Background & Aim: Strawberry (Fragaria vesca L.) is a plant belonging to the Rosaceae family with medicinal properties, including antioxidant activity. The present study aimed at investigating the antioxidant properties of strawberry. Experimental method: To examine the antioxidant effect, fruit extracts at two phonological stages of growth (ripe and unripe strawberry) were prepared. In addition, four different solvents, including 80% ethanol, 80% methanol, acetone and distilled water were used for the preparation of plant extracts. In total, eight different plant extracts were prepared and their properties comparatively studied. To study the antioxidant effect, potassium ferricyanide and reducing power determination method were used. Results & Discussion: Results indicated that strawberry fruit had antioxidant effects in both of two stages. That is due to the presence of the higher pigments and phenolic compounds in ripe fruit than unripe fruit. Recommended applications/industries: The results of present indicated the red fruit had the highest antioxidant activity.
مقدمه و هدف: توت فرنگی (Fragaria vesca L.) گیاهی از خانواده گل سرخ (Rosaceae) است که خواص پزشکی دارد. از جمله می توان به خواص آنتی اکسیدانی آن اشاره کرد. پژوهش کنونی با هدف بررسی خواص آنتی اکسیدانی میوه توت فرنگی است. روش تحقیق: به منظور بررسی اثر آنتی اکسیدانی ، عصاره های میوه در دو مرحله تکوینی از رشد (رسیده و نارس) تهیه شد. به علاوه از 4 حلال مختلف استفاده شد که شامل اتانول 80%، متانول 80%، استون و آب مقطر بودند. در مجموع 8 عصاره گیاهی مختلف تهیه شد و خواص آنها با هم مقایسه شد. برای بررسی اثر آنتی اکسیدانی، از روش تعیین قدرت احیا کنندگی و فری سیانید پتاسیم استفاده شد. نتایج و بحث: نتایج نشان داد که میوه توت فرنگی در هر دو مرحله خواص آنتی اکسیدانی دارد ولی خواص آنتی اکسیدانی در میوه رسیده نسبت به میوه نارس بیشتر بود که به واسطه وجود ترکیبات فنولی و میزان رنگیزه های بالاتر در آن می باشد. توصیه کاربردی/ صنعتی: نتایج حاصل از این پژوهش نشان داد که خواص آنتی اکسیدانی میوه رسیده از نارس بیشتر می باشد.
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