The Actinomycetota are a diverse phylum of Gram-positive bacteria with high G+C content. They can be terrestrial or aquatic. They are of great economic importance to humans because agriculture and forests depend on their contributions to soil systems. In soil they help to decompose the organic matter of dead organisms so the molecules can be taken up anew by plants. While this role is also played by fungi, Actinomycetota are much smaller and likely do not occupy the same ecological niche. In this role the colonies often grow extensive mycelia, like a fungus would, and the name of an important order of the phylum, Actinomycetales, reflects that they were long believed to be fungi. Some soil actinomycetota live symbiotically with the plants whose roots pervade the soil, fixing nitrogen for the plants in exchange for access to some of the plant's saccharides. Other species, such as many members of the genus Mycobacterium, are important pathogens.
Streptomyces is the largest genus of Actinomycetota, and the type genus of the family Streptomycetaceae. Over 700 species of Streptomyces bacteria have been described. As with the other Actinomycetota, streptomycetes are gram-positive, and have very large 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. Different strains of the same species may colonize very diverse environments.
Streptomyces badius is a bacterium species from the genus of Streptomyces which has been isolated from soil in Kaukasus in Russia. Streptomyces badius produces cutinase. Streptomyces badius can metabolize quinoxaline.
Streptomyces bikiniensis is a bacterium species from the genus Streptomyces which has isolated from soil from the island Bikini atoll. Streptomyces bikiniensis produces streptomycin II and carboxypeptidase.
Streptomyces cavourensis is a bacterium species from the genus of Streptomyces which has been isolated from soil in Italy. Streptomyces cavourensis produces flavensomycin.
Streptomyces diastatochromogenes is a bacterium species from the genus of Streptomyces. Streptomyces diastatochromogenes produces polyketomycin, concanamycin A, concanamycin B, concanamycin C, momofulvenone A, azdimycin, toyocamycin and oligomycins.
Streptomyces galbus is a bacterium species from the genus of Streptomyces which has been isolated from soil from West Bengal. Streptomyces galbus produces xylanase, galbonolides A, galbonolides B and the actinomycin X complex.
Streptomyces griseoviridis is a filamentous bacterium species from the genus Streptomyces, which was isolated from soil in Texas, United States. Streptomyces griseoviridis produces etamycin, griseoviridin, bactobolin, prodigiosin R1, actinobolin, and rosophilin. Streptomyces griseoviridis can be used to protect plants since it inhibits the growth of fungal pathogens.
Streptomyces haliclonae is a bacterium species from the genus of Streptomyces which has been isolated from the sponge Haliclona sp in the Chiba prefecture from the coast of Tateyama City in Japan.
Streptomyces halstedii is a bacterium species from the genus of Streptomyces which has been isolated from deeper soil layers. Streptomyces halstedii produces magnamycin B, vicenistatin deltamycin A2, deltamycin A3, bafilomycin B1 and bafilomycin C1. Streptomyces halstedii also produces complex antifungal antibiotics like oligomycins and the antibiotics anisomycin and sinefungin.
Streptomyces kurssanovii is a bacterium species from the genus of Streptomyces which has been isolated from soil in Russia. Streptomyces kurssanovii produces chitinase, N-(Phenylacetyl)-2-butenediamide and fumaramidmycin.
Streptomyces lydicus is a bacterium species from the genus of Streptomyces which has been isolated from soil in the United States. Streptomyces lydicus produces actithiazic acid, natamycin, lydimycin, streptolydigin, and 1-deoxygalactonojirimycin. Streptomyces lydicus can be used as an agent against fungal plant pathogens like Fusarium, Pythium, Phytophthora, Rhizoctonia and Verticillum.
Streptomyces malachitofuscus is a bacterium species from the genus of Streptomyces. Streptomyces malachitofuscus has antifungal metabolites.
Streptomyces microflavus is a bacterium species from the genus of Streptomyces which has been isolated from soil. Streptomyces microflavus produces nemadectin, fattiviracin A1, milbemycin and deoxyuridines. Streptomyces microflavus also produces the ionophore valinomycin. Streptomyces microflavus is also known to cause potato common scab disease in Korea.
Streptomyces rishiriensis is a bacterium species from the genus of Streptomyces which has been isolated from soil in Hokkaido in Japan. Streptomyces rishiriensis produces coumermycin A1, notomycin, 2-chloroadenosine, phosphophenylalanarginine and lactonamycin.
Streptomyces rochei is a bacterium species from the genus of Streptomyces which has been isolated from soil in Russia. Streptomyces rochei produces borrelidin, butyrolactol A, butyrolactol B, uricase and streptothricin. Streptomyces rochei has antifungal activity against Fusarium oxysporum f.sp. lycopersici and Aspergillus fumigatus. Streptomyces rochei produces moenomycin and bambermycin. Streptomyces rochei produces amicetin A, amicetin B, amicetin C and streptolin. Streptomyces rochei produces endo-β-N-acetylglucosaminidase mithramycin, amicetin, bamicetin, and plicacetin.
Streptomyces roseiscleroticus is a bacterium species from the genus of Streptomyces which has been isolated from soil from the Gujarat State in India. Streptomyces roseiscleroticus produces sultriecin.
Streptomyces sanglieri is a bacterium species from the genus of Streptomyces which has been isolated from soil from a hay meadow. Streptomyces sanglieri produces the antibiotic lactonamycin Z.
Streptomyces violascens is a bacterium species from the genus of Streptomyces which has been isolated from soil. Streptomyces violascens produces violapyrone A – G, L-glutamate oxidase and albaflavenoid.
Streptomyces viridosporus is a bacterium species from the genus of Streptomyces. Streptomyces viridosporus produces sistomycine and lignin peroxidase. Streptomyces viridosporus can degrade lignin and humic acids. Streptomyces viridosporus also produces moenomycin A, a component of bambermycin.
