Gene Expression during Sporulation in Streptomyces Coelicolor A3(2)
Colonies of Streptomyces spp growing on suitable agar medium are effectively multicellular organisms which, as they grow, show morphologically, physiologically and functionally distinct regions (reviewed by Chater, 1989a). The tips of hyphae growing out into the agar convert surrounding nutrients into biomass, whereas hyphae in the central region of the colony often show extensive lysis (Wildermuth, 1970), perhaps connected with the supply of their contents as nutrients to the growing aerial hyphae (Mendez et al., 1985). The aerial hyphae themselves have two kinds of cellular organisation: the multinucleoidal hyphae that result from the re-use of materials from the substrate mycelium for a second round of growth, and the strings of uninucleioidal compartments that are found at hyphal tips and which eventually form chains of spores (Wildermuth and Hopwood, 1970). In this paper we focus on current approaches to, and progress in, analysing the events in aerial hyphae that give rise to spore chains.
KeywordsAerial Mycelium Aerial Hypha Glycogen Accumulation Substrate Mycelium xylE Gene
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