جداسازی و شناسایی لاکتیک اسید باکتری های غالب در ترشی سیر و بررسی برخی فعالیتهای پروبیوتیک بالقوه آنها

نویسندگان
1 گروه علوم و صنایع غذایی، واحد قوچان، دانشگاه آزاد اسلامی، قوچان، ایران
2 گروه بیوتکنولوژی صنعتی میکروارگانیسم ها، پژوهشکده بیوتکنولوژی صنعتی، جهاد دانشگاهی مشهد
چکیده
هدف از این پژوهش شناسایی اسید لاکتیک باکتری‌های غالب در ترشی سیر، با استفاده از آزمونهای اولیه بیوشیمیایی و به کمک تکنیک PCR و بررسی فعالیت پروبیوتیکی بالقوه آنها می باشد. بدین منظور جهت تعیین پتانسیل پروبیوتیکی جدایه‌های مذکور، آزمایش‌های تأییدی شامل بررسی مقاومت به اسید، مقاومت به شرایط شبیه‌سازی شده معده، مقاومت به نمک‌های صفراوی، فعالیت علیه باکتریهای بیماری­زا، حساسیت نسبت به برخی آنتی‌‌بیوتیک‌های رایج و فعالیت همولیتیکی جدایه‌ها انجام گرفت. بر اساس نتایج حاصل از BLAST، پنج جدایه Lactobacillus plantarum، دو جدایه به عنوانPediococcus ethanolidurans و یک جدایه به عنوان Lactobacillus brevis شناسایی شدند. لاکتیک اسید باکتری‌های جدا شده در این مطالعه توانایی زندهمانی در pH 2/5، رشد در محیط حاوی 0/3 درصد نمک صفراوی، حساس به آنتیبیوتیکها و فاقد فعالیت همولیتیکی بودند به همین دلیل دارای خواص پروبیوتیکی هستند. همچنین روماند جدایه‌های این پژوهش در غلظتهای بالا توانایی مهار رشد و نیز قدرت کشندگی بر باکتریهای بیماریزا را داشتند. در نهایت جدایههای این پژوهش می‌توانند در آینده به عنوان سویه دارای پتانسیل پروبیوتیک به محصولات دیگر نیز افزوده شوند.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Isolation and Lactic Identification of Dominant Bacteria in Garlic Pickled and Investigation of Some Potential Probiotic Activities

نویسندگان English

Amir Khadang Nikfarjam 1
Elham Mahdian 1
Reihaneh Ahmadzadeh ghavidel 1
Reza Karazhyan 2
1 Department of Food Science and Technology, Quchan branch, Islamic Azad University, Quchan, Iran
2 Industrial Microbial Biotechnoogy Department, Institute of Industrial Biotechnoogy, ACECR, Mashhad
چکیده English

The aim of this study was to identify the lactic acid of the dominant bacteria in pickled garlic, using initial biochemical tests and PCR technique and to investigate their potential probiotic potential. For this purpose, to determine the probiotic potential of these isolates, some confirmatory tests including resistance to acid, resistance to simulated gastric conditions, resistance to bile salts, activity against pathogenic bacteria, susceptibility to some common antibiotics and hemolytic activity of isolates were performed. Based on BLAST results, five isolates of Lactobacillus plantarum, two isolates as Pediococcus ethanolidurans and one isolate as Lactobacillus brevis were identified. The lactic acid bacteria isolated in this study had the ability to survive at pH 2.5, grow in medium containing 0.3% bile salt, were sensitive to antibiotics and lacked hemolytic activity and therefore have probiotic properties. Supernatant of isolates of this study in high concentrations had the ability to inhibit growth of pathogenic bacteria and the lethal activity against them. Finally, the isolates of this study can be added to other products in the future as a strain with probiotic potential.

کلیدواژه‌ها English

probiotics
Garlic
lactic acid bacteria
PCR
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