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Indian Journal of Microbiology

Sheng-Rong Liu, Wei-Rui Zhang, Ai-Ping Chen, Yun-Bo Kuang
Tissue isolation from mushrooms is frequently practiced by both researchers and growers to isolate new and improved strains. In the present study, we designed a simple and convenient device for precise tissue isolation and therefore investigated the effect of tissue size on mycelial growth of seven mushroom species. The developed device consists of a cutting needle and a transfer needle. The cutting needle was used to obtain circular tissue plugs having a height up to 3 mm and variable diameters (2-5 mm) from mushroom fruit bodies...
December 2016: Indian Journal of Microbiology
Sara Fernández, Javier Galapero, Luis Gómez, Carlos J Pérez, Dolores Cid, M Carmen Martín, Juan Manuel Alonso, Joaquín Rey
Pneumonia caused by Mannheimia haemolytica is an important disease in ruminants. Because of its economic significance, several methods have been developed to study the pathogenicity and epidemiology of M. haemolytica. In this study, bacterial isolates of M. haemolytica and Bibersteinia trehalosi identified from the lungs of sheep were serotyped by means of indirect haemagglutination. Of the 598 lungs studied, 34 isolates were identified and serotyped. In decreasing order, M. haemolytica serotypes were: not typable (50 %), A1 (17...
December 2016: Indian Journal of Microbiology
Subramanya Rao, Olivia W Chan, Donnabella C Lacap-Bugler, Stephen B Pointing
This study reports the identification of ionising radiation tolerant bacteria from a high elevation arid region of central Tibet. Nineteen isolates were isolated from soil exposed to ionising radiation at doses from 0 to 15 kGy. Isolates were phylogenetically characterised using 16S rRNA gene sequences. Most isolates comprised taxa from the Actinobacteria, Cyanobacteria, Firmicutes and proteobacteria and these survived doses up to 5 kGy. The Firmicutes and Deinococci also survived doses up to 10 kGy, and the highest dose of 15 kGy was survived only by the Deinococci...
December 2016: Indian Journal of Microbiology
Shalini Porwal, Rajni Singh
Mercury (Hg) is one of the most toxic heavy metal and is extremely harmful for the environment. The permissible limit of mercury in industrial effluents is 0.001 ppm, whereas there are various sites having very high levels of mercury contamination. In the present study, 10 different mercury (Hg) resistant bacterial strains were isolated from Ulhas Estuary, Mumbai (Hg concentration of 107 ppm). All the strains were subsequently grown on higher concentration of mercuric chloride (HgCl2), one of the isolate (USP5) showed significant growth at high concentration of Hg (40 ppm) and 16S rRNA gene sequencing revealed the identity of the bacterium as Methylotenera mobilis, (Accession no...
December 2016: Indian Journal of Microbiology
Changqing Zhao, Xingxiu Zhao, Jing Zhang, Wei Zou, Yi Zhang, Li Li, Jun Liu
The aim of this study was to screen out a bacillus from Sichuan sun vinegar grains capable of producing a high total amount of flavonoids and total phenols. Forty-eight strains were initially screened out from Sichuan sun vinegar grains. The sodium nitrite-aluminum nitrate-sodium hydroxide colorimetry method was used to determine the total flavonoids, and the Folin-phenol method was used to determine the total phenols. Based on the results of total flavonids and total phenol producing capacities of the strains, one strain was singled out for use in this study...
December 2016: Indian Journal of Microbiology
Li-Ping Wang, Kun Lei
Since 2009, Aureococcus anophagefferens has caused brown tide to occur recurrently in Qinhuangdao coastal area, China. Because the algal cells of A. anophagefferens are so tiny (~3 µm) that it is very hard to identify exactly under a microscope for natural water samples, it is very urgent to develop a method for efficient and continuous monitoring. Here specific primers and Taqman probe are designed to develop a real-time quantitative PCR (qPCR) method for identification and quantification continually. The algal community and cell abundance of A...
December 2016: Indian Journal of Microbiology
Swati Tyagi, Razia Sultana, Ho-Jong Ju, Wang-Hyu Lee, Kangmin Kim, Bongchoon Lee, Kui-Jae Lee
Polymyxa graminis, a root endoparasite of several cereal species, is considered to be non-pathogenic but serves as a vector of various plant viruses belonging to the genera Bymovirus, Furovirus, and Pecluvirus. Specifically, it reduces barley productivity by transmitting the Barley Yellow Mosaic Virus (BaYMV). To date, due to its obligate biotrophic property, no artificial culturing of P. graminis was reported and its quantification was also technically challenging. Here, we developed a novel and simple method to infect P...
December 2016: Indian Journal of Microbiology
Flávia de Paula Valim, Elizama Aguiar-Oliveira, Eliana Setsuko Kamimura, Vanessa Dias Alves, Rafael Resende Maldonado
Star fruit (Averrhoa carambola) is a nutritious tropical fruit. The aim of this study was to evaluate the production of a star fruit alcoholic fermented beverage utilizing a lyophilized commercial yeast (Saccharomyces cerevisiae). The study was conducted utilizing a 2(3) central composite design and the best conditions for the production were: initial soluble solids between 23.8 and 25 °Brix (g 100 g(-1)), initial pH between 4.8 and 5.0 and initial concentration of yeast between 1.6 and 2.5 g L(-1). These conditions yielded a fermented drink with an alcohol content of 11...
December 2016: Indian Journal of Microbiology
Nari Lee, Dae Yong Kwon
2,3-Dihydroxybiphenyl 1,2-dioxygenase (2,3-DBDO) is an extradiol-type dioxygenase that involved in third step of biphenyl degradation pathway. The nucleotide sequence of the bphC gene from Comamonas sp. SMN4, which encodes 2,3-DBDO with His-tag, was cloned into a plasmid pQE30 in E. coli. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis of the purified active 2,3-DBDO showed a single band around 33 kDa, corresponding the molecular mass of 2,3-DBDO subunit. Two fractions around 170 and 100 kDa were separated in gel filtration chromatography, but only former one (the fraction of 170 kDa) has 2,3-DBDO activity...
December 2016: Indian Journal of Microbiology
Amrita Kharangate-Lad, Saroj Bhosle
Mangroves are unique ecosystems in the coastal tropical and subtropical regions of the Earth. The fluctuation in salinity due to tidal action results in a prolific population of adhered halophilic and halotolerant bacteria in this ecosystem. In this study, a pigment producing adhered bacterial strain Halobacillus trueperi MXM-16 was isolated from mangrove plant litter of Goa. This strain was moderately halophilic, Gram positive rod, catalase positive and capable of utilizing sodium benzoate as a source of carbon...
December 2016: Indian Journal of Microbiology
Xuefei Song, Qianqian Wang, Xin Xu, Jingwei Lin, Xiaorui Wang, Yating Xue, Rina Wu, Yingfeng An
From 15 samples of dajiang collected in northeast of China, three salt resistant lactic acid bacteria were isolated and identified as Lactobacillusplantarum through physiological studies and 16S rDNA sequence alignment. L. plantarum FS5-5 showed better growth in an environment with 12 % (w/v) NaCl than the other two strains. The expression of proteins extracted from L.plantarum FS5-5 cultured in de Man, Rogosa, and Sharp (MRS) containing 0, 3, 6 and 9 % (w/v) NaCl was analyzed by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS)...
December 2016: Indian Journal of Microbiology
Yangmei Zhang, Haitao Li, Rongya Yang, Congmin Wang
Superoxide dismutase (SOD) and catalase are considered the most important antioxidant enzymes which protect fungus from the oxidant damage of reactive oxygen species. In this study, we collected 44 strains of Trichosporon asahii (T. asahii) from different sources and investigated their SOD and catalase activities. The results showed that the SOD and catalase activities of Clinical group were significantly higher than those of Environment group (p < 0.01). The SOD and catalase activities of T. asahii in Internal passage group went up gradually after passage in mice, and were significantly higher in 5th generation of Internal passage group (p < 0...
December 2016: Indian Journal of Microbiology
Sweety A Wadhwani, Utkarsha U Shedbalkar, Richa Singh, Priya Vashisth, Vikas Pruthi, Balu A Chopade
Cell biomass and metal salt concentration have great influence on morphology of biosynthesized nanoparticle. The aim of present study was to evaluate the effect of varying cell density and gold salt concentrations on synthesis of nanoparticles and its morphology, which has not been studied in bacteria till now. When cells of Acinetobacter sp. SW30 were incubated with different cell density and gold chloride concentrations, tremendous variation in color of colloidal solution containing gold nanoparticles (AuNP) was observed indicating variation in their size and shapes...
December 2016: Indian Journal of Microbiology
M Vasundhara, Manoj Baranwal, Anil Kumar
An endophytic fungus (strain T6) isolated from Taxus baccata was studied for its effect on the growth of human breast cancer cell line (MCF-7), human cervical cancer cell line (HeLa) and peripheral blood mononuclear cells (PBMCs) as well as for its antioxidant activity. Based on morphological characters and internal transcribed spacer (ITS) sequence analysis, this fungus (strain T6) was identified as Fusarium tricinctum. This fungus has shown inhibition in the growth of the MCF-7 and HeLa cancer cell lines...
December 2016: Indian Journal of Microbiology
I Faridha Begum, R Mohankumar, M Jeevan, K Ramani
The present investigation is focused on the study of chemical composition of a bioactive compound derived from a rumen isolate Paracoccus pantotrophus FMR19 using GC-MS and to find out the antibacterial activity of the extracted crude bioactive compounds against multidrug resistant organisms (MDROs) and other clinical pathogens. GC-MS analysis revealed that P. pantotrophus FMR19 produced eight major compounds that have been reported to exhibit antimicrobial property. The main components identified from hexane fraction are long chain alkanes, fatty alcohols, fatty acid methyl ester and aromatic hydrocarbons...
December 2016: Indian Journal of Microbiology
P Tantivitayakul, J Lapirattanakul, T Vichayanrat, T Muadchiengka
Transmission of antibiotic resistance genes among Streptococcus pneumoniae and beta-hemolytic streptococcus (BHS) was generally associated with transmissible genetic elements. The objectives of this study were to investigate carriage rate, antibiotic resistance and related mobile genetic elements of pneumococci and BHS from school-children. The pneumococci and BHS were recovered from 220 Thai school-children, and then tested for antibiotic susceptibility pattern by disc diffusion. Antibiotic resistance genes and related genetic elements were detected by PCR with specific primers...
December 2016: Indian Journal of Microbiology
Kontham Kulangara Varsha, Gopalan Nishant, Srambikal Mohandas Sneha, Ganesan Shilpa, Leena Devendra, Sulochana Priya, Kesavan Madhavan Nampoothiri
A bioactive compound was purified from the culture medium of a new strain of Lactococcus BSN307 by solvent extraction followed by chromatographic techniques. This bioactive compound was identified to belong to phenazine class of compounds by MS, NMR and FTIR. The phenazine compound showed antifungal activity against Aspergillus niger, Penicillium chrysogenum as well as Fusarium oxysporum by disc diffusion assay in addition to antioxidant potential as demonstrated by DPPH scavenging assay. The compound demonstrated selective cytotoxicity against cancer cell lines HeLa and MCF-7 where IC50 was achieved with 20 and 24 µg/mL respectively...
December 2016: Indian Journal of Microbiology
Yunqing Cheng, Ting Liu, Yixin Zhao, Wanting Geng, Longtao Chen, Jianfeng Liu
The nut weevil (Curculio nucum) is one of the most important and widespread pests in hazelnut orchards. In order to screen entomopathogenic fungal strains with high virulence against C. nucum, the growth rate, sporulation, and cumulative mortality of different Metarhizium anisopliae and Beauveria bassiana strains were investigated, and the process by which M. anisopliae CoM 02 infects C. nucum larvae was observed using scanning electron microscopy. The results indicated that the growth rate and sporulation of different fungal strains significantly differed...
December 2016: Indian Journal of Microbiology
Sheetal Ambardar, Rikita Gupta, Deepika Trakroo, Rup Lal, Jyoti Vakhlu
In the present century sequencing is to the DNA science, what gel electrophoresis was to it in the last century. From 1977 to 2016 three generation of the sequencing technologies of various types have been developed. Second and third generation sequencing technologies referred commonly to as next generation sequencing technology, has evolved significantly with increase in sequencing speed, decrease in sequencing cost, since its inception in 2004. GS FLX by 454 Life Sciences/Roche diagnostics, Genome Analyzer, HiSeq, MiSeq and NextSeq by Illumina, Inc...
December 2016: Indian Journal of Microbiology
Sanjay Kumar, Alex Tinson, Brendan Patrick Mulligan, Shreesh Ojha
In order to advance the assisted reproductive technologies used in animals and human beings, it is important to accumulate basic informations about underlying molecular mechanisms that shape the biological processes of reproduction. From within seminal plasma, proteins perform a wide variety of distinct functions that regulate major reproductive events such as fertilization. The ability of such proteins to bind and interact with different antagonistic ions and biomolecules such as polysaccharides, lipids, and other proteins present in the male and female reproductive tract define these capabilities...
December 2016: Indian Journal of Microbiology
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