بررسی و مقایسه فیتوشیمیایی و فعالیت آنتیاکسیدانی عصارههای مختلف سرشاخههای گلدار گیاه Dracocephalum moldavica L. در استان سیستان وبلوچستان
محورهای موضوعی : فیتوشیمیمنیره مهرابی 1 , نوراله حاضری 2 , جعفر ولیزاده 3 , محرم ولیزاده 4
1 - گروه شیمی، دانشکده علوم پایه ، دانشگاه سیستان و بلوچستان، زاهدان، ایران
2 - گروه شیمی، دانشکده علوم پایه ، دانشگاه سیستان و بلوچستان، زاهدان، ایران
3 - گروه زیست شناسی، دانشکده علوم پایه، دانشگاه سیستان و بلوچستان، زاهدان، ایران
4 - گروه گیاهان دارویی، دانشکده کشاورزی، دانشگاه سیستان و بلوچستان، زاهدان، ایران
کلید واژه: فنل, عصاره متانولی, آنتیاکسیدان, فلاونوئید, آنتوسیانین, Dracocephalum moldavica L,
چکیده مقاله :
گیاه بادرشبو با نام علمی (.Dracocephalum moldavica L) گیاهی یکساله متعلق به تیره نعنا (Lamiaceae)است که در طب سنتی در درمان اختلالات گوارشی، کبدی و سردرد استفاده می شود. در این تحقیق سرشاخههای هوایی گلدار گیاه در اسفند ماه سال 1394 از گلخانه دانشگاه سیستان و بلوچستان جمع آوری شد و عصاره های مختلف متانولی، اتانولی و آبی با استفاده از روش خیساندن بدست آمد. میزان فنل، فلاونوئید و آنتوسیانین کل با استفاده از روشهای اسپکتروفتومتری و عملکرد آنتیاکسیدانی عصاره ها توسط دو روش FRAP و DPPH مورد ارزیابی قرار گرفت. نتایج نشان داد عصاره های مختلف متانولی، اتانولی و آبی بهترتیب دارای محتوای فنل کل (1/82، 8/71 و 6/33 میلیگرم معادل گالیک اسید در هر گرم وزن خشک) و فلاونوئید کل بهترتیب (02/34 ، 8/28 و 02/1 میلیگرم معادل کوئرستین در هر گرم وزن خشک) گزارش گردید. نتایج بررسی آنتی اکسیدانی در روش DPPH برای عصارههای مختلف بهترتیب (60/11، 93/34 و 84/302 میکروگرم در میلیلیتر) و در روش FRAP بهترتیب (mMFe2+/mg sample 23/14، 20/8 و 01/1) گزارش شد. تحلیل دادهها نشان داد که عصاره متانولی گیاه نسبت به عصاره اتانولی وآبی از بیشترین مقدار محتوای فنل، فلاونوئید و آنتوسیانین کل و از بیشترین قدرت مهارکنندگی در روش DPPH(μg/ml60/11IC50=) برخوردار بود و این یافتهها در تایید عملکرد آنتیاکسیدانی و سایر مصارف دارویی گیاه قابل بحث است.[1] *نویسنده مسئول: nhazeri@chem.usb.ac.ir
Dracocephalum moldavica L. is an annual herb belongs to Lamiaceae family, which has been used to treat of gastrointestinal, liver disorders and headaches.In this study, flowering branches of plant were collected from the greenhouse of the university of Sistan and Baluchestan in March 2016. The methanol, ethanol, and aqueous extracts of plant were obtained by using maceration method. The amount of total phenolic, flavonoid and anthocyanin contents were evaluated by spectrophotometric methods and the antioxidant activity of the extracts were determined by FRAP and DPPH methods. The results were showed that the phenolic and flavonoid contents different of methanol, ethanol and aqueous extracts were (82.10, 71.8and33.65 mg GAE/g) and (34.02, 28.8and1.02mg QUE/g), respectively. In the evaluation of antioxidant activity by DPPH, the inhibitory power of methanol, ethanol and aqueous extracts were (11.60, 34.93 and 298.96 μg/ml) respectively, and (14.23, 8.20 and 1.01 mM Fe2+/ mg) respectively, sample in FRAP assay. The methanol extract of plant had the greatest content of phenolic (82.10 mg GAE / g), flavonoids (34.02 mg QUE/g) and anthocyanin(113.55μg/g) and antioxidant activity compared to ethanol and aqueous extracts, especially it also had the greatest DPPH inhibitory power (IC50= 11.60 μg/ml).
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