MCB 306 MICROBIAL ECOLOGY LECTURERS Dr. Akintokun, A.K Dr. Balogun,S.O.

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Presentation transcript:

MCB 306 MICROBIAL ECOLOGY LECTURERS Dr. Akintokun, A.K Dr. Balogun,S.O

Synopsis Microorganisms in their natural environments Survey of the roles of microorganisms in the ecosystems Symbiotic relationships Microbial populations and community dynamics Nitrogen fixation Methods of investigation of soil microflora

Soil dilution method Soil plate method Direct inoculation method Immersion method Fluorescent antibody technique Fluorescent in-situ hybridisation (FISH)

Definition of microbial ecology Microbial ecology is the study of the behaviour of microorganisms in their natural habitats and with the relationships between different organisms

Definition of nitrogen fixation Nitrogen fixation is a process of conversion of gaseous form of nitrogen into combined form by some bacteria and cyanobacteria. Nitrogen fixation is of two types symbiotic and asymbiotic nitrogen fixation. The difference between symbiotic and asymbiotic nitrogen fixation is that microorganisms form symbiotic association with leguminous plants to fix atmospheric nitrogen. The asymbiotic nitrogen fixation microorganisms does not formed symbiotic association with plants

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