Bio Lab Wksht & HW Questions 80

Bio Lab Wksht & HW Questions 80 - are produced...

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75 Penicillium is an asexual ascomycete that reproduces by conidia (spores that bud off of hyphal-like conidiophores). Some species of Penicillium play a major role as the source of important drugs, including antibiotics and anti-rejection drugs, while others are used in the production of some of our tastiest cheeses. Examine a prepared slide of Penicillium . Sketch your observations in the space to the right. Can you distinguish between hyphae and conidia? Examine the "blue" area of the blue cheese provided for you under the dissecting microscope. You will not be able to see conidia because they are too small and fragile, but the organism you see is Penicillium . Can you think of any other ways that humans have been able to utilize this organism? Sexual reproduction in the Ascomycota involves the formation of a saclike structure called an ascus (plural; asci ), within which haploid ascospores
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Unformatted text preview: are produced following meiosis. Asci are themselves formed in a complex structure called an ascocarp . You will look at three types of ascocarps in this part of the exercise: a cleistothecium (closed and spherical) a perithecium (vase-shaped with a small pore at one end) or open and an apothecium (cup-shaped). The asci usually develop as a layer inside the ascocarp. Examine prepared slides of Erysiphe (powdery mildew, a plant parasite). When you look at this slide, remember that most of the body of any fungus is located inside something; in this case, the plant stem, which occupies most of the slide. The ascocarps are located on the outer edge of the plant stem so that spores can be dispersed by air currents. Locate the ascocarps containing asci and ascospores . This ascocarp is a cleistothecium . Why? Sketch a typical cleistothecium and its contents in the space to the right....
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This note was uploaded on 12/27/2011 for the course BSC 1020 taught by Professor Danmoon during the Fall '11 term at UNF.

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