Authors: Nikulin, Marjo & Reijula, Kari & Stjernvall, Tuula & Hintikka, Eeva-Liisa
Journal: Karstenia, Volume 37 (1997), Issue 2, pages 57-64.
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Key words: electron microscopy, mycotoxins, Stachybotrys chartarum
Abstract: The fine structure of two Stachybotrys chartarum strains, one toxic (S. 72) and one non-toxic (S . 29) was investigated by transmission electron microscopy (TEM). It is not known if certain morphological details of the fungus are correlated with its toxin producingcapacity. The hyphae and conidia in both strains possessed three wall layers:an electron lucent inner layer, more dense middle layer, and an electron dense outer layer. The outer layer in both strains was uneven and formed an echinulate surface on the conidium. Only minor morphological differences were observed between the toxic and non-toxic strains. The echinulate surface of the conidium of the non-toxic strain was thinner than that in the toxic strain and the outer surface of the hyphae of the non-toxic strain was smoother than the hyphal surface of the toxic strain.