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Concept explainers
To review:
A technique or a strategy for tree harvest that helps in maintaining the reforestation of trees and also cuts down its cost by retaining the viable mycorrhizal communities.
Introduction:
Mycorrhiza is the mutualistic association formed between a tree and the fungi through its roots. The tree provides fungi food and energy formed by photosynthesis whereas fungi help the tree/plant in the absorption of water and essential minerals from the soil, which are required for its growth.
The presence of mycorrhiza is nearly universal in the plant kingdom as they play a key role in providing essential micronutrients from the soil to the plant. There are two types of mycorrhiza, ectomycorrhizal and endomycorrhiza.
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Chapter 29 Solutions
LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
- From an agricultural perspective, describe two advantages of vegetative propagation.arrow_forwardCoffee (Coffea arabica) and Chocolate (Theobroma cacao) are two species of tropical or sub-tropical understory trees that have a rich history in human cultures. Given your knowledge about the plants, and considering the three main pillars of sustainability (environmental quality, economic vitality, and social justice), discuss important considerations for ensuring that coffee and chocolate production can be sustainable for the present and into the future. What are some of the most important considerations? Propose some specific recommendations to increase the sustainability of our relationships with these plant species. Make sure to address all three pillars of sustainability in your answer.arrow_forwardThe specific relationship between a legume and its mutualisticRhizobium strain probably depends on(A) each legume having a chemical dialogue with a fungus.(B) each Rhizobium strain having a form of nitrogenase thatworks only in the appropriate legume host.(C) each legume being found where the soil has only theRhizobium specific to that legume.(D) specific recognition between chemical signals and signalreceptors of the Rhizobium strain and legume species.arrow_forward
- What are the economic and environmental impacts if agarwood become extinct? Provide examples on how to promote conservations and sustaining of agarwood as a natural resource?arrow_forwardIf a community is concerned about finding out how nearby hydrologic(fracking) for gas has affected the quality of local river, why might paramecium or euglena play a role in the process of investigating this?arrow_forwardDoes the trade-off between growth and defense favor a single species that dominates in all soil types or different species specialized for each habitat?arrow_forward
- Which of the following explains why pea plants in high soil nitrogen conditions have so few rhizobial nodules on their roots? When there is already high soil nitrogen there is a very large cost to having rhizobial nodules. The rhizobia bacteria in the nodules fix nitrogen when there isn't enough in the soil, so when there is already high soil nitrogen there is no advantage for the pea plant to expend the extra energy housing the rhizobia. The rhizobia bacteria in the nodules use nitrogen when there isn't enough in the soil, so in conditions of high soil nitrogen the plant tries to exclude the rhizobia to keep the nitrogen for itself. When there is already high soil nitrogen there is no benefit to the plant to having rhizobial nodules, which can rob the plant of the high nitrogen supplies so that the rhizobia bacteria do not have to fix the nitrogen themselves.arrow_forwardWhat is the mode of action of biofertilizer Mykovam?arrow_forwardIf it were possible to increase nitrogen transport from rhizobia in root nodules to any part of soybean plants, what implications would this have for agriculture and food?arrow_forward
- 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?arrow_forwardWho will benefit mangrove planting?arrow_forwardThe greatest difference in health between two groups of plantsof the same species, one group with mycorrhizae and one groupwithout mycorrhizae, would be in an environment(A) where nitrogen-fixing bacteria are abundant.(B) that has soil with poor drainage.(C) that has hot summers and cold winters.(D) in which the soil is relatively deficient in mineral nutrientsarrow_forward
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