FUNGAL RELATIONSHIPS WITH TREES

We are always researching science literature to discover new methods and ideas to help produce superior adapted trees and plants to survive climate change. I ran across the topic of mycorrhiza and, it turns out, the fungal/root inter relationships are quite intriguing.

Fungi are common throughout the forest ecosystems. Some fungi are common forest mushrooms, puffballs and truffles. Colonization of the area is from wind dispersion of their spores. Other fungi are not wind dispersed, but only found in the soil. Once fungus and plant root meet, a wonderful thing happens – a fungus root. These feet are known as mycorrhiza. These mycorrhiza create a symbiotic relationship between fungus and root.

Benefits to the plant are huge. The mycorrhiza produce growth hormones that stimulate feeder root elongation and branching. By creating more arbuscules in the roots, these growth hormones are, indirectly, protecting roots against pathogens. First, the pathogens have no direct entry to the roots of the plants. The pathogens must pass through these arbuscules, a direct barrier, in order to gain root entry. Next, the arbuscules can produce antibiotics to some root pathogens to discourage entry. Lastly, arbuscules encourage increased plant health and, therefore, more resistance to disease. How?

Mycorrhiza enhance uptake of water and mineral nutrients, especially Phosphorus and Nitrogen. These uptakes from the soil are made possible due to the soil exploration of the hyphae sent out from the colonized root tips. It is estimated that these fungal hyphae can explore hundreds to thousands more volumes of soil than just root tips themselves. The fungi even interact and change the soil environment of the plant by improving the soil structure and quality. The filaments from the fungal hyphae create polysaccharides and protein that bind soils, increase soil porosity and promote aeration and water movement.

Surprisingly, in North America, few nurseries utilize mycorrhiza inoculation for their growing plant stock. It seems the natural thing to do, especially for the forestry industry. With climate change and changing ecosystems, mycorrhizal inoculating trees would produce more hardiness and increase tree survival rates. This year, is our test year at, Puslinch Naturally Native Trees, for mycorrhizal inoculation. We will keep you informed of our results.