نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار ، گروه زیست شناسی، دانشکده علوم پایه، دانشگاه شهید مدنی آذربایجان، تبریز، ایران

2 دانشیار، گروه زیست شناسی، دانشکده علوم پایه، دانشگاه شهید مدنی آذربایجان، تبریز، ایران

3 استادیار ، گروه شیمی، دانشکده علوم پایه، دانشگاه شهید مدنی آذربایجان، تبریز

چکیده

آنزیم ال- آسپاراژیناز تجزیه آسپاراژین را به آسپارتیک اسید و آمونیاک کاتالیز کرده و یکی از مهمترین آنزیم ها در صنایع دارویی و غذایی می باشد. هدف از این مطالعه، جداسازی و شناسایی قارچ های اندوفیت تولید کننده آنزیم آسپاراژیناز از گیاه مریم گلی باغی و تعیین فعالیت این آنزیم در این قارچ ها می باشد. در این پژوهش، گونه های مختلف قارچ های اندوفیت از برگ های سالم گیاه مریم گلی باغی جداسازی گردید. سنجش کیفی آنزیم آسپاراژیناز روی محیط کشت آسپاراژین آگار و سنجش کمی آن در محیط کشت سیزپکس داکس به روش طیف نور سنجی با معرف نسلر انجام شد. بررسی های ریختی و مولکولی نشان داد جدایه ها بدست آمده به جنس های Alternaria، Stemphylium، Talaromyces و Linnemannia تعلق دارند. گونه های مختلف با ایجاد هاله صورتی تا قرمز رنگ نشان دادند قادر به تولید آنزیم آسپاراژیناز هستند. گونهAlternaria alternata با تولید U/mg 34/2 آسپاراژیناز در محیط کشت سیزپکس داکس، بهترین جدایه تولید کننده آنزیم انتخاب شد و می تواند به عنوان یک گزینه مناسب برای تولید آنزیم مطرح باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Isolation and identification of L-asparaginase-producing endophytic fungi from Salvia nemorosa L.

نویسندگان [English]

  • Samaneh Narimani 1
  • Mostafa Ebadi 1
  • Mohammad Pazhang 2
  • Saeid Mollaei 3

1 Assistant Professor, Department of Biology, Azarbaijan Shahid Madani University, Tabriz, Iran

2 Associate Professor, Department of Biology, Azarbaijan Shahid Madani University, Tabriz, Iran

3 Assistant Professor , Department of Chemistry, Azarbaijan Shahid Madani University, Tabriz، Iran

چکیده [English]

L-asparaginase is an enzyme that catalyzes the hydrolysis of asparagine into aspartic acid and ammonia and is one of the most important enzymes in the pharmaceutical and food industries. The goal of this study was the isolation and identification of asparaginase producing endophytic fungi from Salvia nemorosa and the determination of their enzyme activities. In this study, different species of endophytic fungi were isolated from healthy leaves of S. nemorosa. A qualitative assay of asparaginase enzyme was performed on asparagine agar medium and its quantitative assay was performed on Czapexdox's medium by spectroscopic method with Nessler reagent. Morphological and molecular investigations indicated that the obtained isolates belonged to genera of Alternaria, Stemphylium Talaromyces, and Linnemannia . Different species were shown to be able to produce the asparaginase by creating a pink to a red color zone. Alternaria alternata was selected as the best enzyme-producing isolate by producing 2.34 U/mg asparaginase in Czapexdox's medium, and could be considered as a potential source for enzyme production.

کلیدواژه‌ها [English]

  • L-asparaginase
  • Phylogenetic
  • Endophytic fungi
  • S. nemorosa
  • Nesslerization
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