Soil microflora
others are beneficial sources of antibiotics.
Stretomyces - Over 500 species of Streptomyces bacteria have been described. As with the
other Actinobacteria, streptomycetes are Gram-positive, and have genomes with high GC
content. Found predominantly in soil and decaying vegetation, most streptomycetes produce
spores, and are noted for their distinct "earthy" odor that results from production of a volatile
metabolite, geosmin.
Algae - any of numerous groups of chlorophyll-containing, mainly aquatic eukaryotic
organisms ranging from microscopic single-celled forms to multicellular forms 100 feet (30
meters) or more long, distinguished from plants by the absence of true roots, stems, and
leaves and by a lack of nonreproductive cells in the reproductive structures. Today, algae are
used by humans in many ways; for example, as fertilizers, soil conditioners and livestock
feed
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