Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 29, Problem 2Q
Summary Introduction
To review:
The types of plants that most dependent on their mycorrhizal partners and the other comments that could be provided about the dependency on the fungal partner and the habitat.
Introduction:
Some plants live in close association with the arbuscular mycorrhizal fungal species. The
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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
How do mycorrhizae function as biofertilisers? Explain with example.
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?
Chapter 29 Solutions
Life: The Science of Biology
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- What are mycorrhizae? Discuss the different types in detail and give two examples of fungi that form mycorrhizae with economically important plants.arrow_forwardWhat are some ways in which the relationship between a plant root and a mycorrhizal fungus is mutualistic?arrow_forwardWhat are mycorrhizae? and what are the different types of mycorrhizae, mention two examples of fungi that form mycorrhizae with economically important plants.arrow_forward
- 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_forwardWhat are mycorrhizas? How does each participant benefit in this ecological interaction?arrow_forwardThere are some plants such as Indian pipe and orchids that do not have chlorophyll, yet they are connected to the mycorrhizal web. What would you suspect their relationship to be?arrow_forward
- Ecologists often attempt to introduce new plants to restore degraded land. In an arid climate, scientists recommend introducing plants with arbuscular mycorrhizae. How would the mycorrhizae increase the plants’ survival compared to plants without mycorrhizae?arrow_forwardEndomycorrhiza of forest trees contributes to the efficient nutrient cycling in tropical forest ecosystems. Reason.arrow_forwardRead these two statements about plant-fungal interactions, then pick the statement below that is TRUE. (A) Root fungi in phylum Ascomycota can cause plants to produce antioxidants that provide protection against the stress of drought, and plants feed carbon to the fungi in their roots. (B) Root fungi and plants have evolved mutual benefits through a long history of interaction, in which fungi that provided the greatest benefits to plants had the highest fitness because of the carbon the plants fed them, and plants that supported fungi had the highest fitness because of the protection provided by the fungi. (A) is a proximate cause for plant-fungal symbiosis, whereas (B) is an ultimate cause. O (A) is an ultimate cause for plant-fungal symbiosis, whereas (B) is a proximate cause. Understanding plant-fungal interactions would NOT require cost-benefit analysis because there are no fitness trade-offs. (A) is an innate behavior and (B) is a learned behavior. O O O Oarrow_forward
- Describe the major similarties and differences between peziza and saccharomyces.Note ecological and ecnomic features of those taxa. Which organism would you most likely find involved in a mycorrhizal relationshiparrow_forwardDetermine if the following statements are true and false. (a) Mycorrhizae exhibit non-symbiotic relatiionship.(b) All biotic relationships are symbiotic.arrow_forwardIn mycorrhizal associations with plants what are the structures produced by VAM fungi and Ectomycorrhizal fungi to facilitate the exchange of nutrients, and how do they differ?arrow_forward
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