Last week I mentioned I was culturing a fungus I isolated from my sink. I currently have several pure cultures growing. It has been difficult to name the little whippersnapper (I have never written whippersnapper before, it is a fine word . . . I shall use it again in the future).
I did a DNA sequence, which proved to be somewhat helpful. Here is the ITS result:
After entering that sequence into GenBank I sorted through the hits. The most promising lead is Fusarium dimerum, which is actually not an individual species but is a complex instead. It seems my sink fungus is a resident of that complex.
It is possible that the structures I thought were regular micronidia are actually small macronidia (which would explain my difficulty in identifying the fungus).
Here is what it looks like in culture:
This shot shows hyphal growth on potato dextrose agar and pieces of carnation leaves. The morphological characteristics that help identify it (micronidia, macronidia, chlamydospores, ect) are microscopic features . . . so you won’t be seeing them, in this photo.
I need to do my final write-up. That’s on the schedule for tomorrow. . .