Streptomyces avermitilis and Streptomyces coelicolor


Just a quick update that our donated strain samples are growing!  We don’t have an incubator so we’re making due with a room temperature dark cabinet, so while not optimal, it gets the job done.

We plated our samples of Streptomyces coelicolor and Streptomyecs avermitilis about a week ago, and it seems they have finally undergone formation of aeriel hyphae alongside production of the pigmented polyketide antibiotic actinorhodin (in the case of coelicolor).    One of the plates of coelicolor does not look the same as the other colonies though.  A purple color is being produced by the organism, and they have a much smoother/slimier look to the colonies.  Perhaps they are a day or two away of forming the fuzzy aeriel mycelia, or perhaps they are a mutant.   We will keep an eye on them.

We will be using them in our future work as part of a bio-assay for the compounds we are making.  The one picture of the brown pigment diffusing from the two colonies are those of S. avermitilis, the maker of avermectin.



6 replies
  1. Jakub
    Jakub says:


    I would like to ask you, whether I can use your pictures in my bachelor thesis. I am writing about biosynthesis of the antibiotics in Streptomycetes and your pictures would be very useful for me.

    • Dakota
      Dakota says:

      Hi Jakub, thank you so much for asking. Of course you can!! I love that people are studying Streptomyces. My whole research is around seconday metabolite biosynthesis in Streptomyces coelicolor…actinorhodin, streptorubin B, the prodiginines, so feel free to ask me any questions!

      Very kind of you to ask.

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