ارزیابی میزان کلروفیل، فعالیت ضداکسایشی و اثر ضدمیکروبی عصاره برگ قاصدک

نوع مقاله : مقاله پژوهشی لاتین

نویسندگان

• سحر روشنک ¹
• بهروز علیزاده بهبهانی ²
• فخری شهیدی ¹
• فریده طباطبایی یزدی ¹
• علیرضا وسیعی ¹
• ندا نوروزی ¹

¹ گروه علوم و مهندسی صنایع غذایی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران.

² گروه علوم و مهندسی صنایع غذایی، دانشکده علوم دامی و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ملاثانی، ایران.

https://doi.org/10.22067/ifstrj.v17i1.82421

چکیده

در این پژوهش محتوای کلروفیل، محتوای فلاونوئیدی کل، محتوای فنل کل و فعالیت ضداکسایشی عصاره آبی قاصدک موردبررسی قرار گرفت. همچنین، تأثیر عصاره آبی خبررسانک به‌دست آمده به‌روش خیساندن، بر برخی میکروارگانیسم‌های عامل فساد و مسمومیت ناشی از مواد غذایی آزمایش شد. فعالیت ضدمیکروبی عصاره برگ قاصدک با استفاده از روش‌های انتشار دیسک و چاهک، حداقل غلظت بازدارندگی و حداقل غلظت کشندگی موردبررسی قرار گرفت. مقادیر به‌دست آمده برای TFC ،TPC، کلروفیل a و b به‌ترتیب 82/22 (میکروگرم بر میلی‌لیتر)، 89/116 (میلی‌گرم بر میلی‌لیتر)، 81/0 (میلی‌گرم بر لیتر) و 063/0 (میلی‌گرم در لیتر) بود. فعالیت به‌دام‌اندازی رادیکال‌های آزاد، برحسب IC₅₀ برابر با 81/68 میکروگرم بر میلی‌لیتر بود. نتایج نشان داد که MIC عصاره برگ قاصدک برAspergillus niger ،Salmonella typhimurium ، Bacillus subtilis وStaphylococcus epidermidis به‌ترتیب 512، 256، 256 و 64 میلی‌گرم بر میلی‌لیتر بود.  MBCعصاره برگ قاصدک بر Aspergillus niger ،Salmonella typhimurium ، Bacillus subtilis و Staphylococcus epidermidis به‌ترتیب بیش از 512، 256، 256 و 128 میلی‌گرم بر میلی‌لیتر به‌دست آمد. نتایج نشان داد که قطر هاله بازدارندگی در روش چاهک آگار بیشتر از روش دیسک دیفیوژن بوده و سویه‌ها در غلظت بالاتر قطر هاله بازدارندگی بیشتری نشان دادند. به‌طورکلی می‌توان اظهار داشت که عصاره آبی گیاه قاصدک روی باکتری‌های گرم مثبت فعالیت ضدمیکروبی بیشتری نسبت به باکتری‌های گرم منفی داشت، درحالی‌که اثر بازدارندگی چشمگیری بر کپک‌ها نداشت. براساس یافته‌های این پژوهش، عصاره آبی قاصدک می‌تواند به‌عنوان یک ماده طبیعی برای جلوگیری از رشد میکروارگانیسم‌های عامل فساد مواد غذایی و به‌ویژه عامل مسمومیت غذایی و با هدف کاهش خطر ابتلا به بیماری‌­های گوارشی، مورداستفاده قرار گیرد.

کلیدواژه‌ها

• قاصدک
• فعالیت ضدمیکروبی
• فعالیت ضداکسایشی
• میکروارگانیسم‌های بیماری‌زا

موضوعات

• زیست فناوری مواد غذایی

عنوان مقاله [English]

Evaluation of chlorophyll content, antioxidant activity and antimicrobial effect of Dandelion leaves extract

نویسندگان [English]

• Sahar Roshanak ¹
• Behrooz Alizadeh Behbahani ²
• Fakhri Shahidi ¹
• Farideh Tabatabaei Yazdi ¹
• Alireza Vasiee ¹
• Neda Norouzi ¹

¹ Department of Food Science and Technology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.

² Department of Food Science and Technology, Faculty of Animal Science and Food Technology, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran.

چکیده [English]

In this research, the chlorophyll content, total flavonoid content (TFC), total phenolic content (TPC) and antioxidant activity of aqueous extract of Dandelion was determined. In addition, the effect of aqueous extract of Dandelion, obtained by maceration, was tested on various food borne and food spoilage microorganisms. Antimicrobial activity of leaf extract of Dandelion was investigated using disk agar diffusion, well agar diffusion, minimum inhibitory concentration and minimum bactericidal/fungicidal concentration methods. The values obtained for TFC, TPC, chlorophyll a and b were 22.82 (µg/mL), 116.89 (mg/mL), 0.081 (mg/l) and, 0.063 (mg/l), respectively. The result of the radical scavenging activity was IC₅₀= 68.81µl/mL. The results showed that MIC of leaf extract of Dandelion on Aspergillus niger, Salmonella typhimurium, Bacillus subtilis and Staphylococcus epidermidis was 512, 256, 256 and 64 mg/ml respectively. MBC for Aspergillus niger was more than 512, for Salmonella typhimurium, and Bacillus subtilis was 512, and for Staphylococcus epidermidis was 128mg/ml. In addition, the diameter of inhibitory growth zone in well diffusion method was more than disk diffusion. Generally, it can be stated that the aqueous leaf extract of Dandelion on Gram-positive bacteria showed more antimicrobial activity than Gram-negative bacteria, while there is no significant inhibition on mold. Based on the results of this study, Dandelion aqueous extract might be used as a natural agent to prevent the growth of food borne microorganisms, particularly, that cause food poisoning that leading to the reduction of gastroenteritis risk.

کلیدواژه‌ها [English]

• Antimicrobial activity
• Antioxidant activity
• Dandelion
• Pathogenic microorganisms

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