List of Articles Streptomycete

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  1 - Evaluation of trans-glutaminase enzyme production in native Streptomyces isolated from agricultural soils of Qom province
  Somayeh Bahri Soheil Aghaei Seyyed Mohammad Hossein Razavian Faezeh Kabiri
  Purpose: Transglutaminase enzyme is a type of protease enzyme of acyltransferase type, the bonds formed by this enzyme cause strength and stability in the products of various industries. Actinobacteria have biotechnological applications due to their ability to produce s More

  Purpose: Transglutaminase enzyme is a type of protease enzyme of acyltransferase type, the bonds formed by this enzyme cause strength and stability in the products of various industries. Actinobacteria have biotechnological applications due to their ability to produce secondary metabolites and enzymes. The present study was conducted with the aim of identifying and screening trans-glutaminase-producing actinobacterial strains from the soils of the rhizosphere area of native medicinal plants in Qom province.Materials and Methods: In this research, 100 samples of soil from agricultural fields in Qom province were collected in completely sterile conditions and after preparing successive dilutions, they were cultured on ISP3 agar culture medium. Actinobacterial isolates were screened by transglutaminase enzyme specific identifier. Environmental factors including culture medium and shaker cycle were optimized on isolate growth and enzyme production. In order to identify and investigate the phylogeny of actinobacterial isolates, phenotypic and molecular methods were used.Findings: Out of 40 actinobacterial isolates, 5 strains showed the ability to produce the enzyme, based on the halo of color change by the specific substrate N-Carbobenzoxy (CBZ). The selected isolate with the highest amount of enzyme production, in terms of 16S rRNA gene synonymy, was similar to Streptomyces genus.Conclusion: The results of this study showed that Streptomyces isolate native to agricultural soils of Qom province has a significant ability to produce transglutaminase enzyme, which was studied for the first time. This isolate can be used in various food and pharmaceutical industries to produce transglutaminase enzyme. Manuscript profile
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  2 - Identification of soil actinomycetes and their effects in olive (Olea europea L.) variety Conservalia
  Parvin Bagheri Farah Farahani soheil Aghaei
  Objective: Actinomycetes are useful for biocontrol against soil fungi and increase seed growth, plant weight and yield in some crops. In this study, the isolation, identification and investigation of the population of Streptomyces species in the agricultural soil of C B More

  Objective: Actinomycetes are useful for biocontrol against soil fungi and increase seed growth, plant weight and yield in some crops. In this study, the isolation, identification and investigation of the population of Streptomyces species in the agricultural soil of C Bagh Fadak area and the effect on the seed growth of olive (Olea europea L.) cultivar Conservalia were investigated. Materials and methods: In this study, actinomycetes were isolated from the soil of region C, then primary screening, culture and secondary screening were done by diffusion in agar and DNA extraction and the effect on seed growth of conservalia cultivar olives. DNA molecular identification was done for all the isolates andtheir  rRNA 16s genes were amplified by PCR reaction and the positive samples were sequenced. The results of phylogenetic analyzes of all recorded sequences of this gene were downloaded from the NCBI database and saved for phylogenetic analysis with Mega 7 software in FAST A format. The whole sequence of isolating, identifying and checking the population of Streptomyces species was entered into the software. Findings: 40 actinomycete bacteria were isolated from the soil of area C of Fadak garden. By performing specific tests, Streptomyces isolates were identified. Biochemical and morphological tests (stringy and white appearance) on 5 isolates confirmed the presence of streptomycetes. By producing auxin, the isolates were effective in increasing the rooting of Conservalia cultivar olive seeds. The rooting capacity of Streptomyces isolate D was statistically significant (probability level 0.05). Conclusion: Streptomyces of agricultural soils are effective on tree rooting.   Manuscript profile