For more information on the mutants and the developmental stages referenced, see Perkins et al. The representative wild-type strain. Some regions of aerial hyphae that gave rise to the conidiophore are also visible. This mutant is blocked before the major constriction stage and makes unusually long minor constriction chains, which can occasionally be observed to revert to hyphal growth. Macroconidiophores are short and stunted.
Conidial separation is inefficient, resulting in long chains of proconidia.
Conidial separation is almost non-existant, resulting in very long chains of proconidia. Calcofluor staining of proconidial chains reveals very thick crosswalls that lack the usual ultrastructure. The lack of hyphal septa results in extremely fragile hypha. A single rupture in the cell wall can lead to a deflation of the entire hypha, as shown in the picture. This aconidial mutant is blocked before the major constriction stage, but it possesses fewer minor constriction chains than acon-3 .