Nutrition - These spores can be conidia sporangiospores...

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Nutrition. Fungi grow best where there is a rich supply of organic matter. Most fungi are  saprobic (obtaining nutrients from dead organic matter). Since they lack photosynthetic  pigments, fungi cannot perform photosynthesis and must obtain their nutrients from  preformed organic matter. They are therefore chemoheterotrophic organisms.  Most fungi grow at an acidic pH of about 5.0, although some species grow at lower and  higher pH levels. Most fungi grow at about 25°C (room temperature) except for  pathogens, which grow at 37°C (body temperature). Fungi store glycogen for their  energy needs and use glucose and maltose for immediate energy metabolism. Most  species are aerobic, except for the fermentation yeasts that grow in both aerobic and  anaerobic environments. Reproduction. Asexual reproduction occurs in the fungi when spores form by mitosis. 
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Unformatted text preview: These spores can be conidia, sporangiospores, arthrospores (fragments of hyphae), or chlamydospores (spores with thick walls). During sexual reproduction, compatible nuclei unite within the mycelium and form sexual spores. Sexually opposite cells may unite within a single mycelium, or different mycelia may be required. When the cells unite, the nuclei fuse and form a diploid nucleus. Several divisions follow, and the haploid state is reestablished. Fungal spores are important in the identification of the fungus, since the spores are unique in shape, color, and size. A single spore is capable of germinating and reestablishing the entire mycelium. Spores are also the method for spreading fungi in the environment. Finally, the nature of the sexual spores is used for classifying fungi into numerous divisions....
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This note was uploaded on 11/11/2011 for the course BIO 101 taught by Professor Pesthy during the Fall '07 term at Texas State.

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