BIOL 2P96 Lecture 4: Fungal Growth and Development
6 Aug 2015
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Stages of fungal development: dormancy, activation/germination, growth, differentiation & morphogenesis. Dormancy: dormant structures frequently formed under adverse conditions, decreasing temperature, water drying up, depletion of substrate, physical stresses, dormancy prevents germination under these conditions, dormant structures, exposed spores, spores within fruiting structure, sclerotia, mycelium. Inhibitors in soil, marine environment or produced by plants: dormancy imposed by environmental conditions. Temperatures too low for germination or growth. Incorrect ph: germination initiated/growth resumed when restraining environmental condition is alleviated, factors allowing germination are also required for continued mycelial growth, no triggering mechanisms, eg. Ensure they don"t germinate while in close proximity to one another and consequently compete for a limited supply of nutrients in the environment. Germinate once thoroughly dispersed from one another and methyl-cis- ferulate has leached out of the spore and become diluted in the environment: e. g. uredospores of puccinia graminis, cause of rust disease in cereal crops:
