availability of molybdenum and absence of available phosphate restricts the growth of Azotobacter. 11. Microbial associations / interactions: Microorganisms interact with each other giving rise to antagonistic or symbiotic interactions. The association existing between one organism and another whether of symbiotic or antagonistic influences the population and activity of soil microbes to a great extent. The predatory habit of protozoa and some mycobacteria which feed on bacteria may suppress or eliminate certain bacteria. On the other hand, the activities of some of the microorganisms are beneficial to each other. For instance organic acids liberated by fungi, increase in oxygen by the activity of algae, change in soil reaction etc. favors the activity or bacteria and other organisms in soil. 12. Root Exudates: In the soil where plants are growing the root exudates also affects the distribution, density and activity of soil microorganism
bakterid ning on vhem tundlik saasteainete toksiliste kontsentratsioonide suhtes. Eriti arvukas ja aktiivne mikroobide kooslus tekib veetaimede juurte vahetus lheduses ja juurte pinnal. BIOREMEDIATSIOONI TEOORIA Naftaproduktide lagundamise mikrobioloogia Ssivesinikke suudavad mikroorganismid lagundada ksnes vees. Kik ssivesinikud on mingil mral vees lahustuvad ja seetttu on vimalik nende lagundamine mikroobide poolt. Ssivesinikke suudavad lagundada paljud bakterid (Bacillus, Pseudomonas, Mycobacteria, aktinomtseedid), seened (Trichoderma, Aspergillus, Cladosponum) ja prmid. Alkaanide biodegradatsioon toimub nii aeroobsetes kui ka anaeroobsetes tingimustes. Igal mikroorganismil on kindel spekter ssivesinikke, mida nad on vimelised lagundama. n-alkaanidest lagundatakse kige paremini molekule vahemikus C10-C24, viksema ja suurema arvu ssiniku molekulidega n-alkaane mikroobid ei lagunda vi lagundavad vga aeglaselt. Mulla mikroobidest on kuni 20% vimelised lagundama ssivesinikke.
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