Abstract
Mycologists have put extreme emphasis on hyphal tip growth as the primary mode of growth in filamentous fungi. Much attention has also been focused on the exocytosis of extracellular enzymes from hyphal tips. However, growth and exocytosis commonly occur at hyphal locations other than tips. Here I briefly review our limited understanding of growth and exocytosis during intercalary hyphal extension, subapical branch initiation, septum formation and secondary wall thickening. Secretion of extracellular enzymes and adhesion molecules from subapical hyphal regions is also discussed. Recent research using advanced live-cell imaging techniques (e.g. Hayakawa et al., 2011 in this issue) is providing new insights into the mechanistic basis of many of these processes.
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