If plants can pick fungi to help fight pests and diseases, it opens a door to greener farming and ecosystem recovery

By Adam Frew, Western Sydney University, Carlos Aguilar-Trigueros, University of Jyväskylä, Jeff Powell, Western Sydney University, Natascha Weinberger, Western Sydney University, Stephanie Watts-Fawkes, University of Adelaide

Just beneath your feet, an ancient and silent alliance endures. This alliance between plants and arbuscular mycorrhizal (AM) fungi is one of the oldest biological partnerships on Earth.

Going back almost half-a-billion years, this relationship paved the way for plants to make it onto land. These early plants, simple and without the complex root systems of plants today, forged an alliance with fungi. This alliance has been instrumental to the evolution of plant life and has helped shape our ecosystems.

These fungi grow into roots where the plants supply them with the carbon (as sugar and fat) they need to survive. The fungi extend thin root-like threads called mycelia into the soil to make expansive networks that can access nutrients beyond the reach of plant roots.

But these hidden microbes do more than just help plants get nutrients. Plants are constantly dealing with insect pests and diseases, and have done for a long time. To deal with this, they evolved sophisticated defences. AM fungi can dramatically enhance these defences.

So could plants be picking their fungal allies based on their ability to enhance defences against pests and diseases? We recently explored this question and proposed hypotheses around how this could happen. The answer could have huge implications for making agriculture more sustainable.

Harnessing the ancient alliance

Considering the benefits AM fungi can provide plants, it’s no surprise there has been a lot of interest in using them in environmental management. Studies show AM fungi can have huge benefits for ecosystem restoration by supporting the establishment of native plant communities. Their importance to ecosystem function makes it clear mycorrhizal fungi should be included in conservation efforts.

In agricultural systems, fungi can increase crop growth, nutrient uptake and yields. These benefits have been a major focus for researchers since the 1950s.

Read Full Story https://theconversation.com/if-plants-can-pick-fungi-to-help-fight-pests-and-diseases-it-opens-a-door-to-greener-farming-and-ecosystem-recovery-221994