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Revolt of the Fungus People

Mycorrhizae in the Ecosystem

By Clyde Freeman Herreid

Revolt of the Fungus People



This interrupted case study for the flipped classroom examines the interaction of plants and their mycorrhizal partners. The latter is one of the most widespread and vital symbiotic relationships in the world and can be seen in the videos that students should view before discussing the material in class. Thousands of different species are involved, some obligate and others facultative. The case examines the recent studies identifying the spectacular and wide array of intraspecific and interspecific chemical communication among organisms, giving us a glimpse of the enormously complex interactions in an ecological community. The case can easily be used as a springboard for discussion about the social and political issues that might arise when humans disrupt these ecosystems. The case was developed for college general biology but can easily be used in environmental science, ecology or evolution classes. In fact, several of the questions raised address issues that are most appropriate for advanced students. What is essential is that the students have a general knowledge of fungal anatomy and mycorrhizae before starting the activity.


Date Posted




  • Describe how mycorrhizae function to enhance the transport of nutrients throughout the plant community.
  • Describe the airborne communication between individuals of the same species of plants and some of the ecological and evolutionary consequences.
  • Describe the importance of airborne vapors in attracting herbivore consumers and predators/parasitoids.
  • Demonstrate critical thinking skills in evaluating data and graphs.
  • Consider and discuss how these symbiotic relationships among plants could have evolved.
  • Consider and discuss the possible ramifications of soil ecosystem disruption and how we might restore land productivity.
  • Consider and discuss what role coevolution could have played in the community of plants and mycorrhizae.


mycorrhizae; plant communication; symbiosis; fungus; soil ecosystem; coevolution; network; warning signal; underground signals


Subject Headings

Biology (General)
Botany / Plant Science
Evolutionary Biology


Undergraduate lower division, Undergraduate upper division






Policy issues, Regulatory issues






Flipped, Interrupted



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