Summary
Fungal hyphae link plant roots, transferring nutrients and signals between individuals.
In depth
Networks (the 'wood wide web') can transfer carbon, nitrogen and warning signals; mother trees may support seedlings. The extent of benefit is debated. Disturbance such as clear-cutting may disrupt them.
Common networks allow transfer of resources and signals, but experiments show effect sizes depend on conditions. Nutrient transfer can occur from plants rich in carbon to those in shade.
Example: orchids rely on fungi to supply carbon during germination.
Common mycorrhizal networks (CMNs) connect roots of different plants, and tracer experiments with carbon-13 and carbon-14 (Simard, 1997) showed carbon transfer between birch and Douglas fir. Mother trees may favour kin seedlings, and networks may carry defence signals, though critics argue evidence for ecological significance is limited and that fungi may be acting in their own interests. Some plants, such as Monotropa (ghost pipe) and many orchid seedlings, are myco-heterotrophs that take carbon from fungi.
Disturbances such as clear-cutting and tilling harm networks. Networks may speed forest regeneration and help seedlings survive shade. Research uses isotopes, DNA sequencing and manipulation experiments.
Remember: the popular term wood wide web captures an idea that is still being tested.
Frequently asked questions
What is Mycorrhizal Networks?
Fungal hyphae link plant roots, transferring nutrients and signals between individuals.
Which area of biology covers Mycorrhizal Networks, and how advanced is it?
Mycorrhizal Networks is one of the 56 topics in Plant Biology. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Plant Hormones, Root Nodules and Symbiosis, Algal Blooms and Plant Evolution.
Can you give an example of Mycorrhizal Networks?
Douglas fir and birch exchange carbon via fungi, according to isotope tracer studies.
What should I learn before Mycorrhizal Networks?
Work through the Beginner topics in Plant Biology first, such as Plant Kingdom, Photosynthesis, Chlorophyll, then return to Mycorrhizal Networks. Advanced topics assume the Intermediate vocabulary.
What topics are related to Mycorrhizal Networks?
The closest topics to Mycorrhizal Networks are Plant Hormones, Root Nodules and Symbiosis, Algal Blooms and Plant Evolution, Plant Nutrition and Mineral Deficiency. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Mycorrhizal Networks?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Mycorrhizal Networks. To practise the whole of Plant Biology, use the Plant Biology quiz.
How is Mycorrhizal Networks different from Plant Hormones?
Mycorrhizal Networks: Fungal hyphae link plant roots, transferring nutrients and signals between individuals. Plant Hormones: Auxin, gibberellin, cytokinin, abscisic acid and ethylene regulate growth, development and responses. Read both side by side and note what each one explains.
How should I study Mycorrhizal Networks step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Plant Hormones and explain the difference aloud. Finally, take the Plant Biology quiz and come back to this page for any question you miss.