Sodium-Dependent Azotobacter chroococcum Strains Are Aeroadaptive, Microaerophilic, Nitrogen-Fixing Bacteria
نویسندگان
چکیده
منابع مشابه
Phosphate solubilization characteristics of efficient nitrogen fixing soil Azotobacter strains
BACKGROUND AND OBJECTIVES Azotobacter is a diazotroph bacterium reported to possess various plant growth-promoting characteristics.The aim of this study was to isolate Azotobacter strains capable of fixing nitrogen and effectively hydrolyzing both organic and inorganic Pi compounds. MATERIALS AND METHODS In this study, soil samples collected from a diverse range of slightly alkaline soil type...
متن کاملMelanin from the Nitrogen-Fixing Bacterium Azotobacter chroococcum: A Spectroscopic Characterization
Melanins, the ubiquitous hetero-polymer pigments found widely dispersed among various life forms, are usually dark brown/black in colour. Although melanins have variety of biological functions, including protection against ultraviolet radiation of sunlight and are used in medicine, cosmetics, extraction of melanin from the animal and plant kingdoms is not an easy task. Using complementary physi...
متن کاملDirect electrochemistry of two genetically distinct flavodoxins isolated from Azotobacter chroococcum grown under nitrogen-fixing conditions.
Two genetically distinct flavodoxins, designated AcFldA and AcFldB, were isolated from Azotobacter chroococcum (MCD1155) grown under nitrogen-fixing conditions. AcFldA and AcFldB differ in their midpoint potentials for the semiquinone-hydroquinone couple (Em -305 mV and -520 mV respectively). Only AcFldB was competent to act as an electron donor to the Mo-containing nitrogenase of A. chroococcu...
متن کامل5-n-Alkylresorcinols from the nitrogen-fixing soil bacterium Azotobacter chroococcum Az12.
A mixture of five saturated 5-n-alkylresorcinol homologues was isolated from vegetative cells of the nitrogen-fixing soil bacterium Azotobacter chroococcum Az12. Their structures were established by spectrometry (1H NMR, EI-MS, FAB-MS, FAB-MS/MS) and chromatography (GC, TLC) means.
متن کاملSymbiosis between Chlorella Sp. and Azotobacter Chroococcum and Nitrogen Fixation
Alfred Koch has given considerable attention to the subject of nitrogen fixation by bacteria as resulting from their symbiosis with alga~. Many others have also investigated various features of this problem. In spite of all this there are numerous questions which remain unsolved. The use of soil cultures for such studies is objectionable on account of the soil's complexity, its variety of flora...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1988
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.54.8.2123-2128.1988