Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 46, Problem 5CT
As noted in Section 46.7, mycorrhizal
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Biologists have discovered that many mycorrhizal fungi are sensitive to a low pH. What human-caused environmental problem may prove catastrophic for these fungi? How may this problem affect their plant partners? What measures could we take to decrease the problem?
Mycorrhizal fungi live in the soil and interact with the roots of plants. Essentail nutrients (e.g. nitrogenous compounds) are taken from the soil by the fungi and transferred to the plant roots. The fungi extract carbohydrates from the plant roots. What type of interaction is occurring?
Both Ascomycetes and Basidiomycetes form ectomycorrhizal associations with plants. Another
group of fungi, the Glomeromycota, form endomycorrhizal partnerships. Which answer below best
describes the two pictures seen here? (Hint: mycorrhizae stain reddish-purple!)
Picture A
400x (c.s.)
Picture B
400x (c.s.)
O Picture A is an endo- while Picture B is an ecto-mycorrhizal view
O Picture A is an ecto- while Picture B is an endo-mycorrhizal view
Chapter 46 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 46 - In most ecosystems, the primary producers use...Ch. 46 - Organisms at the lowest trophic level in a...Ch. 46 - Prob. 3SQCh. 46 - Prob. 4SQCh. 46 - Efficiency of energy transfers in aquatic...Ch. 46 - Prob. 6SQCh. 46 - Earths largest carbon reservoir is _______. a. the...Ch. 46 - Carbon is released into the atmosphere by _____ a....Ch. 46 - Prob. 1DAACh. 46 - Prob. 2DAA
Ch. 46 - Changes in the Air To assess the impact of human...Ch. 46 - Changes in the Air To assess the impact of human...Ch. 46 - Prob. 9SQCh. 46 - The _____ cycle is a sedimentary cycle. a....Ch. 46 - Earths largest phosphorus reservoir is _______. a....Ch. 46 - Prob. 12SQCh. 46 - Nitrogen fixation converts _______ to _______. a....Ch. 46 - Prob. 14SQCh. 46 - Prob. 15SQCh. 46 - Marguerite plants a vegetable garden in Maine....Ch. 46 - Where does your drinking water come from? An...Ch. 46 - Scientists study bubbles trapped in ancient...Ch. 46 - Nitrogen-fixing bacteria live throughout the...Ch. 46 - As noted in Section 46.7, mycorrhizal fungi help...
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- Fungi play a variety of roles in the ecosystem. Discuss briefly each of the following roles stated below. Give specific examples whenever possible. 1. Decomposers 2. Mycorrhizae 3. Lichen Symbiont 4. Endophyte 5. Plant Pathogenarrow_forwardYou have been asked to consult for a biotech company that is seeking to understand why some fungi can live in very extreme environments, such as the high temperatures inside naturally occurring hot springs. The company has isolated two different fungal species, F. cattoriae and W. gravinius, both of which can grow at temperatures exceeding 95°C. The company has determined the following things about these fungal species (see attached image) By sequencing and examining their genomes, the biotech company hopes to understand why these species can live in extreme environments. However, the company only has the resources to sequence one genome, and would like your input as to which species should be sequenced and whether you believe a shotgun strategy will work in this case.arrow_forwardThe ascomycete fungus that causes chestnut blight and has killed an estimated 4 billion chestnut trees in North America was accidentally imported from Asia. Why are plants particularly vulnerable to fungi imported from other regions? How do the plants in Asia protect themselves against ascomycete fungus so they are not affected?arrow_forward
- Which of the following is true of mychrrhizae? 1. The fungal hyphae of ectomycorrhizae form arbuscles. 2. Ectomycorrhizae penetrate the cytoplasm of root cells. 3. Endomycorrhizal fungal hyphae form a dense mantle ensheathing roots. 4. Ectomycorrhizae are found in many crop plants such as wheat and maize. 5. Ectomycorrhizal fungal hyphae form a dense mantle ensheathing roots.arrow_forwardIn a research work you are interested in studying the presence of certain fungi associated with the roots of a tree. What is the most suitable medium to cultivate the samples obtained? Why?arrow_forwardLichens are a mutualistic association of a fungus and either an alga or a cyanobacterium in which the fungus slowly engulfs the photosynthetic partner. the phototroph provides inorganic phosphorus to the fungus. the fungus helps collect sunlight for the photosynthetic partner. the fungus protects the photosynthetic partner from erosion.arrow_forward
- You have discovered a secondary metabolite made by an unusual fungus that has great industrial potential. Unfortunately, the fungus makes very little of this product, so you must develop a scheme to increase the yield. Can you think of using a technique that might be useful to enhance the productivity of that secondary metabolite?arrow_forwardFairy rings (such as the one in the photo on the left) are circles of fungi that often appear in open meadows and in forest areas. In the soil beneath the fungi is an ever-extending mycelium. As the mycelium spreads to seek out more food, it sometimes will produce the fungi we see above ground to produce and release spores. The diagram on the right depicts the outline of a fairy ring that has appeared overnight in an open meadow, as viewed from above. The ring represents the farthest advance of this mycelium through the soil. The letters A-D represent locations with respect to that ring which are all 0.5 meters below the soil surface. Which location (A-D) is nearest to the basidiocarps? ___ What is the most probable location (A-D) of the youngest portion of this mycelium? ___arrow_forwardFairy rings (such as the one in the photo on the left) are circles of fungi that often appear in open meadows and in forest areas. In the soil beneath the fungi is an ever-extending mycelium. As the mycelium spreads to seek out more food, it sometimes will produce the fungi we see above ground to produce and release spores. The diagram on the right depicts the outline of a fairy ring that has appeared overnight in an open meadow, as viewed from above. The ring represents the farthest advance of this mycelium through the soil. The letters A-D represent locations with respect to that ring which are all 0.5 meters below the soil surface. 1)If the fungus that produced the fairy ring can also produce arbuscules, then which of the following is most likely to be buried at location "B"? a. cement-capped well b. deceased animal c. tree stump d. fire pit 2) Assume that all four locations are 0.5 meters above the surface, rather than below. On a breezy day with prevailing winds blowing from right…arrow_forward
- Why do yeasts generally have to be cultured for longer periods than most bacteria? Can bacteriological media be used for the cultivation of molds? Explain your answer. What is the difference between vegetative and aerial mycelia? What are the three classes of antifungal drugs based on their mechanism/site of action? Describe the mode of action of each class. Name one fungal virulence factors that promote fungal colonization. Explain the mechanism. Name one fungal virulence factors that damage the host. Explain the mechanism.arrow_forwardAfter a long excursion in the tropics you came back with multiple soil samples from different localities across the Andes. You are interested in discovering new sources of pharmaceuticals and want to test the antibiotic properties of fungi collected from tropical soils at different altitudes. How would you approach this question?. What scientific experiment would you conduct to isolate fungi with antibiotic characteristics?. Please be specific about your design, including your expected outcomes and conclusions from your experiment.arrow_forwardA group of researchers run an experiment to determine the effect of mycorrhizae (a fungus) on plant growth. The researchers set up three experimental groups: A large amount of mycorrhizae is applied to the plants in group 1 a smaller amount of mycorrhizae is applied to the plants in group 2, and no mycorrhizae is applied to the plants in group 3. Which group(s) is/are the experimental group(s)? More than one answer may be correct. Select all that apply. O Group 3 Group 2 Group 1arrow_forward
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