Nuclear distribution and gene expression in the secondary mycelium of Schizophyllum commune

Fungi in Their Own Right

“…Since the presence of different B mating-type genes suppresses activity of the SC3 gene in a common A heterokaryon, we investigated why suppression did not occur in the secondary mycelium carrying nuclei with different A and B mating-type genes (Á sgeirsdó ttir et al, 1995;Wessels et al, 1998). We found that within the mycelium of the secondary mycelium, cellular differentiation occurs, such that individual hyphae synthesize either SC3 or SC4 but not both.…”

Structural Proteins Involved in Emergence of Microbial Aerial Hyphae

“…The molecules forming these layers have not yet been identified. Rodlets were observed on aerial structures of cultures of S. coelicolor grown on minimal medium (Wildermuth, 1972). However, SapB is not produced under this condition.…”

“…Like fungal aerial hyphae, aerial hyphae of Streptomycetes are covered with a rodlet layer (Wildermuth et al, 1972; Fig. 1), which in turn is coated with a hydrophobic film (Hopwood and Glauert, 1961;Wildermuth et al, 1972). The molecules forming these layers have not yet been identified.…”

“…The SC3 gene is expressed in both the primary and a fertile secondary mycelium under control of the mating type loci Wessels et al, 1995Wessels et al, , 1998 and probably facilitates formation not only of individual aerial hyphae, but also of fruiting bodies. In such mycelia this hydrophobin gene is expressed after only a few days of submerged growth (see above).…”

Hydrophobin Gene Expression Affects Hyphal Wall Composition in Schizophyllum commune

“…commune contains at least four hydrophobin genes, SC1, SC3, SC4, and SC6 . The SC3 gene is active in the primary (monokaryotic) and secondary (dikaryotic) mycelium, while the SC1, SC4, and SC6 genes are active in the secondary mycelium only (Mulder and Wessels, 1986;Wessels et al, 1995Wessels et al, , 1999. The SC3 hydrophobin is most extensively studied.…”