نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه دریانوردی و علوم دریایی چابهار

چکیده

زمینه و هدف: افزایش مقاومت باکتری‌های پاتوژن به آنتی بیوتیک‌ها و پیدایش بیماری‌های جدید از چالش‌های بشر است. از طرفی، فراوانی و تنوع متابولیت‌های ثانویه در جلبک دریایی، آن‌ها را به ماده‌ی اولیه برای ساخت دارو در صنعت تبدیل کرده است. عمده‌ی متابولیت‌های ثانویه‌ی جلبک‌های دریایی ترکیبات هالوژنه هستند که خواص ضدمیکروبی، ضدقارچی و ضدویروسی دارند.
مواد و روش‌ها:عمل عصاره‌گیری به‌وسیله‌ی حلال‌های آلی متانول و ان‌هگزان به دو روش اولتراسوند و خیساندن انجام شد. از آزمون-های انتشار دیسک، حداقل غلظت مهار کننندگی و حداقل غلظت کشندگی به منظور بررسی خواص ضدمیکروبی علیه باکتری‌های موردمطالعه استفاده شد. آنالیز داده‌ها از طریق آنالیز واریانس یک‌طرفه انجام شد.
یافته ها: باکتری لیستریا مونوسایتوژنز بیشترین میزان حساسیت را نسبت به عصاره‌ی ان‌هگزانی جلبک Dictyota cervicornis در رقت 5/1 (جرم/ حجم) از خود نشان داد که در مقایسه با سایر رقت‌ها اختلاف معنی داری نداشت (05/0 p>). عصاره‌های استخراج شده به روش خیساندن هیچ گونه هاله‌ی عدم رشدی علیه باکتری‌های مورد مطالعه ایجاد نکردند.
نتیجه گیری: با توجه به استاندارد‌ها عصاره‌های الکلی جلبک Dictyota cervicornis خاصیت ضدباکتریایی مطلوبی نداشتند اما در صورت خالص سازی ترکیبات عصاره، می‌توان به نتایج مطلوب‌تری رسید.

کلیدواژه‌ها

عنوان مقاله [English]

Antimicrobial properties of Dictyota cervicornis algae against several bacteria

نویسندگان [English]

  • Mostapha Ghafari
  • Ali Taheri

چکیده [English]

Background: Increasing the resistance of pathogenic bacteria to antibiotics is the new challenges for human Bing. Seaweeds are good sources of raw material for drug products due to the abundance and diversity of secondary metabolites. The major secondary metabolites of marine algae are halogenated compounds, which show antimicrobial, antifungal and antiviral properties.
Materials and Methods: The extraction procedure was conducted by maceration and ultrasounication with organic solvents include methanol and n-hexane. The disk diffusion test, MIC and MBC study was conducted to evaluate the antimicrobial properties against bacteria. Data analysis was performed by One Way ANOVA.
Results: In this study, Listeria monocytogenes showed highest sensitivity to n-hexanic extract of algae Dictyota cervicornis in 1/5 dilution W/V, in compare to the dilution of 1/10 and 1/15W/V (p>0.05). Soaking method extracts didn’t show any significant effect against the studied bacteria.
Conclusion: based on the results, n-Hexanic extract of the Dictyota cervicornis algae showed better antibacterial effects in compare to the Methanolic extract and soaking method. But if biochemical composition of the extract could be recognize, the antibacterial effect of the extract could be enhanced.

کلیدواژه‌ها [English]

  • Dictyota cervicornis
  • methanolic extract
  • n-hexane
  • maceration method
  • ultrasound method
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