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Articles by Sonia Aghighi
Total Records ( 3 ) for Sonia Aghighi
  Daie , Neda , Gholam Hosein Shahidi Bonjar , Abdol Ali Saberi and Sonia Aghighi
  Production of electricity by microorganisms is a new interesting subject which has received high attention by researchers, industries and NASA. In Microbial fuel cells (MFC) electricity is generated via microbial activities. It is proposed that waste materials as sewage, food leftovers and basically all sorts of biodegradable organic matters have the capability to be used in MFC. These devices are harmless to the environment. Basically wide range of bacteria can be used as candidates in MFC. Basic structure, mechanism of action, types of microorganisms and chemical reactions are discussed in this paper.
  G.H. Shahidi Bonjar and Sonia Aghighi
  Among soil-borne fungi, cosmopolitan phytopathogen, Verticillium dahliae Klebahn is responsible for high yield losses in many plant species. Except for solarization in mediterranean countries and except in the few cases where disease-resistant cultivars are available, control of Verticillium wilt in commercial crops has been highly dependent on the application of preplant soil fumigants. Research to develop alternative control measurements should focus on biological approaches aimed at shifting the composition of soil microbial communities to suppress Verticillium. The merits of role of actinomycetes in biological control of soil-borne fungal-pathogens are known, however actinomycetes microflora of the Iranian soils has not been very well explored in searching for biofungicide agents. At the present research, in vitro studies of some biological effects of two Iranian strains of actinomycetes, Streptomyces plicatus strain 101 and Frankia sp. strain 103, are presented. Both strains revealed enzymatic activity and inhibited production of microsclerotia in V. dahliae. Treating the crude extract with chloroform, denaturized enzymatic activity of both strains. Thermal inactivation point of active phases of S. plicatus was 70 and 90°C and in Frankia sp. was determined as 60°C. Antifungal active phases of S. plicatus tolerate wide range of pH (5-13) but in Frankia sp. active phase tolerates pH 7-9. These two strains may be useful candidates for involving in integrated control programs of Verticillium vascular wilting.
  Gholam Hosein Shahidi Bonjar , Parvin Rashid Farrokhi , Sonia Aghighi , Leyla Shahidi Bonjar and Ataollah Aghelizadeh
  Antifungal actinomycete strains were assayed for antagonistic activity against Verticillium dahliae, Alternaria solani, Fusarium solani and Geotrichum candidum, four worldwide phytopathogenic fungi. For better evaluation of the spectral activity of the isolated Actinomycetes, two yeasts, Saccharomyces cerevisiae and Candida albicans were also included in the survey. From 110 soil inhabitant strains that have been isolated from soil samples of Kerman province, southeast of Iran, 10 strains showed antifungal activities as determined through screening and bioassays by agar disk and well-diffusion methods. Active strains that have broad spectrum of antifungal activity were grown in submerged cultures and active crude was prepared upon which some preliminary characterizations conducted.
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