The Genetics of Fungal Differentiation and Morphogenesis
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Growth of the vegetative fungal hypha,showing polarized,invasive extension growth localized at the hyphal apex, is the fundamental growth pattern of all members of Kingdom Fungi, and of some members of related groups. If we can borrow a word used in everyday computer terminology, the fungal hypha is the default growth condition of the fungal genome. Vegetative hyphal growth requires coordinated expression of the components of the genome so that the whole of the growth process can be supported, located,and projected into the extension of the hyphal tip. All of this requires regulation of gene expression. Most fungi also produce a range of cell types that differ in cell shape and growth pattern. These require further programs in which gene expression is integrated into developmental routines involving transmission and receipt of signals to organize transitions between different cell types.Some of those signals will be intracellular, and some will be extracellular relating the nutritional and physical state of the environment,but all will require signal transduction pathways comprising receptor, transmission,and amplication and effector components.
KeywordsAspergillus Nidulans Schizophyllum Commune Vegetative Hypha Repeat Induce Point Fungal Differentiation
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