Here’s something that might surprise you: fungi represent one of the most diversified kingdoms on Earth, with estimates reaching up to 12 million species, yet only 150,000 fungal species are currently described. This massive knowledge gap hints at just how much we’re still discovering about these microscopic powerhouses that quietly drive soil health and ecosystem productivity.
The Hidden Network: Understanding Soil Fungi
Soil fungi aren’t just tiny mushrooms waiting to sprout after rain; They’re sophisticated organisms that form extensive underground networks. These thread-like structures, called hyphae, can extend for miles through soil, connecting plants and facilitating nutrient exchange across vast distances. Fungal biomass is particularly important due to its role as a biological bridge. While bacteria excel at breaking down simple organic compounds, fungi are up to 4x more effective at utilizing complex compounds like lignin and cellulose.
Carbon Storage Champions: The Fungal Advantage
Soil stores more carbon than the atmosphere and all living vegetation combined. Fungi play a major role in this process and recent studies have uncovered some fascinating details about their carbon storage capabilities. This challenges previous assumptions about soil carbon dynamics and highlights why fungal biomass matters more than we previously realized.
The Fungal-Bacterial Balance: Why Ratios Matter
Here’s where soil science gets really interesting. It’s not just about having fungi present; it’s about achieving the right balance between fungi and bacteria. Research using RNA sequencing, protein profiling, and isotope tracer techniques has shown that higher fungal-to-bacterial ratios are linked to altered carbon cycling and enhanced soil carbon storage.
The implications extend beyond carbon storage. Fungi contribute to:
Mycorrhizal Magic: Plant-Fungi Partnerships
The symbiotic relationship between plant roots and fungi, specifically mycorrhizal, is incredible. Mycorrhizal fungi form intimate partnerships with a majority of plant species, creating mutually beneficial exchanges that have evolved over hundreds of millions of years. These partnerships work like underground trading networks. Plants provide fungi with carbon-rich sugars produced through photosynthesis. In return, fungi extend the plant’s root system exponentially, accessing water and nutrients from areas the roots could never reach alone.
Environmental Restoration and Fungal Recovery
The importance of fungal biomass becomes even more apparent when examining ecosystem restoration efforts. Desertified system restoration shows that with recovery efforts, plant species richness and aboveground biomass increase significantly, along with improvements in soil organic carbon and total nitrogen. Fungi play a critical role in this restoration process. Their extensive hyphal networks help stabilize soil, reduce erosion, and create the foundation for plant community recovery. As fungal communities reestablish themselves, they facilitate the return of diverse plant species and accelerate ecosystem recovery.
IngenuityWorx has been working to prove that the application of nanobubble oxygen as an irrigation/fertigation tool can provide low cost, easily applied plant benefits both indoors and outdoors.
It has been known for over 40 years that increased oxygen to plant roots in soil improves nutrient absorption, reduces effects of saline water or sodic soils, and increases plant growth and yields. However, traditional aeration technology prevented its use. Aerated water was limited to very short application duration and limited travel time in an irrigation line with low oxygen transfer efficiency.
The new science of nanobubbles allows us to add high dissolved oxygen concentrations, reaching 30-50 ppm, and the oxygen transfer will continue to take place for weeks. The nanobubbles don’t coalesce and break like macro bubbles, they move within the water using Brownian motion, and upon giving up all their oxygen produce small amounts of reactive oxygen species including hydrogen peroxide. This feature provides a built-in cleaning process that removes biofilm.
The microBIOMETER® analysis here shows that high dissolved oxygen in the irrigation water stimulated the microbial biomass and fungi to increase in number indicating a healthy microbiome in the soil for plant growth.
Additional work is ongoing to measure and understand the effects of the oxygenated water and microbial increases as it relates to soil carbon utilization, and its impact on carbon reserves and available nutrients. For more information, please contact bo*@***********rx.com.
Source: How Plants ‘Farm’ Soil Microbes and Endophytes in Roots
UPDATE: Dr. White sat down with Dr. Fitzpatrick and Jeff Lowenfels to discuss rhizophagy. Click here to view the webinar. (Jan. 15, 2021)
A summary of James F. White’s presentation at BioFarm, 2020 (Nov. 12, 2020).
The rhizophagy cycle is an amazing process recently discovered by James White’s laboratory at the University of New Jersey, by which root tips “ingest” bacteria and absorb nitrogen and phosphorus and other nutrients from them.
The microbes pictured here in roots are called endophytes because they can live inside plants. The bacteria are attracted to the root tip by root exudates. They then enter the root where the cell walls are dissolved using superoxide, allowing nutrients to leak out to the plant. But the plant does not kill the microbes instead the microbes stimulate the formation of root hairs, which are escape routes for the microbes.
After ejection from root hair tips, bacterial cell walls re-form. The bacteria fatten up and are soon ready to acquire soil nutrients and become another meal for the plant.
Source: How Plants ‘Farm’ Soil Microbes and Endophytes in Roots
Not only does rhizophagy provide mineral nutrients, it is also the stimulus for formation of root hairs, which are critical to the establishment of a healthy root as can be seen in this photo of a plant root with and without endophytes.
