- Symbiotic Soil Fungi - Benefits of CO2 - Carbon Dioxide
Our mission is to educate the public on the positive effects of additional atmospheric CO2 and help prevent the inadvertent negative impact to human, plant and animal life if we reduce CO2
 
Home
 
    
Why CO2 is Good
 
    
Climate Change
 
    
Politics are Not Green
 
    
News & Media
 
    
Stay Informed
 
    
About Us
 
    
 
  Symbiotic Soil Fungi

<< Back

The Role of Roots

Nitrogen-Fixing Bacteria

Carbon Starvation

Rising CO2 Promotes the Growth of Important Soil Fungi
One of the most important secondary consequences of CO2-induced growth stimulation in resource-limited situations is the enhancement of the activity of a host of other root-zone or rhizosphere microorganisms.  Supported by enhanced root exudation of organic substances, which may comprise as much as 40% of the photosynthates moving into a plant's roots, this CO2-augmented phenomenon typically stimulates a multiplicity of growth-promoting effects beneath the soil surface, one of the most important of which is the enhancing of the growth of a number of soil mycorrhizal fungi.

Possibly numbering in the hundreds of thousands of species, fungi are key players in most ecosystems.  Indeed, there is evidence to suggest that they are absolutely essential for growth in stressful environments.  And, the benefits plants receive from mycorrhizae are often proportional to mycorrhizal abundance, which has been demonstrated in a number of experiments to be enhanced by atmospheric CO2 enrichment.

So what are the benefits of enhanced soil mycorrhizal activity?  For starters, as the "better-fed" hyphae of more numerous and robust symbiotic fungi extend outward from their CO2-enriched hosts, they lengthen the life of absorptive root hairs and increase the area of root surface available for water and nutrient uptake.  They also secrete organic acids that hasten the chemical weathering of soil minerals; and they are especially adept at making phosphorus available to plants by this means.  In addition, they are known to produce a variety of hormones that stimulate root growth, enhancing the production of lateral roots and root hairs. Finally, symbiotic soil fungi tend to protect their hosts from toxic materials in the soil, including heavy metals and salt.

 

 

 

 
Print Print    Email Email
  Share link on Twitter Tweet  

 
** For additional peer-reviewed scientific references and an in-depth discussion of the science supporting our position, please visit Climate Change Reconsidered: The Report of the Nongovernmental Planel on Climate Change (www.climatechangereconsidered.org), or CO2 Science (www.co2science.org).
 
 
RELATED CONTENT

More Videos & Media ...

Carbon Dioxide in the atmosphere is essential to life on earth and is directly responsible for the food we eat and the oxygen we breathe.


CO2 Myths

Plants need CO2 addresses the myth that purveyed the public dialog around CO2

Read more >>