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Introduction of Fusarium sp. UTMC 5039 as a potent fungal strain for biosurfactant production and evaluation of its potential for crude oil bioremediation | ||
| زیست شناسی میکروبی | ||
| Article 3, Volume 6, Issue 23, September 2017, Pages 19-33 PDF (947.63 K) | ||
| Document Type: Original Article- Persian | ||
| DOI: 10.22108/bjm.2017.21659 | ||
| Authors | ||
| Hamid Moghimi* 1; Parvin Hasani zadeh2; Javad Hamedi3; Rezvan Heidarytabar4; Ehsan Azin5 | ||
| 1Assistant professor in Microbial Biotechnology, Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran | ||
| 2M.Sc in Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran | ||
| 3Associate professor in Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran | ||
| 4Msc in Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran | ||
| 5Msc student in Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran | ||
| Abstract | ||
| Introduction: Biosurfactants are biological surface active agents which are used in many applications such as oil bioremediation of contaminated soils. Materials and methods: In this study, first soil samples were collected from crude oil contaminated regions of Iran. Fungal isolates were enriched in MSM medium supplemented with crude oil and purified and then all isolates were screened for biosurfactant activity. Then, the capacity of crude oil degradation in the selected isolate was measured using Total Petroleum Hydrocarbon (TPH) assay by spectrophotometry and FT-IR analysis. Finally, morphological and molecular identification was carried out by sequencing amplification of beta-tubuline beta-tubulin and ITS gene. Results: Among 40 purified fungal isolated, the isolate SH-02 was selected as the best strain according to the oil spreading and parafilm M test., This isolate was purified from petroleum contaminated soil of Arak refinery. Morphological and molecular identification revealed that this isolate has 99% similarity to Fusarium redolens in ITS geneand was deposited in the University of Tehran Microorganisms Collection under the accession number, UTMC 5039. Measurement of surface tension reduction by Du Nouy Ring method showed that Fusarium sp. UTMC 5039 can reduce surface tension to 26.6 mN/m and this reduction amount is significant compared with the previous reports. According to the obtained results from TPH and FTIR assays, 60 % of crude oil was degraded biodegradation was measured for by Fusarium sp. UTMC 5039. Discussion and conclusion: The current study results indicate that Fusarium sp. UTMC 5039 has a high capacity in biosurfactant production and introduced as a potent fungal strain for crude oil bioremediation. | ||
| Keywords | ||
| Biosurfactant; Fusarium sp. UTMC 5039; Bioremediation; crude oil contaminated soils | ||
| Full Text | ||
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مقدمه. نتایج. جدول 1- نتایج آزمایشهای مربوط به 5 جدایۀ برتر در آزمونهای بیوسورفکتانت با روش پارافیلم M آزمایشگاهی و گسترش روغن؛ ++ نشاندهندۀ پخش گستردۀ قطره (بالای 10 میلیمتر) و + نشاندهندۀ پخش محدودتر (کمتر از 10 میلیمتر) قطره نسبت به شاهد روی سطح پارافیلم
جدول 2- خاکهای نمونهگیریشده از مناطق آلوده به نفت و بررسی برخی از خصوصیات خاکها
جدول 3- کشش سطحی حاصل از 5 جدایۀ انتخابی برای تعیین زمان حداکثر تولید بیوسورفاکتانت توسط این سویه، میزان تولید بیوسورفکتانت در طی 12 روز ارزیابی شد؛ در این راستا، هالۀ شفاف تولیدی در روزهای 3، 6، 9 و 12 اندازهگیری شد (شکل1). به این ترتیب با رسم نمودار حاصل، مشخص شد که SH-02 بیشترین تولید بیوسورفکتانت را در روز 6 با قطر هالۀ 9 سانتمتر دارد (شکل2).
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