Impact of arbuscular mycorrhizal species on heterodera glycines

October 26, 2020

Introduced to the United States over 60 years ago, soybean cyst nematode (SCN) has spread broadly throughout the Midwest and eastern parts of the country. After penetrating the root tissue, SCN take nutrients away from the soybean plant and reduce plant growth and yield. These nematodes are the leading cause of soybean losses in the United States--in 2014, SCN resulted in the loss of 3.5 million tons of soybean.

While there are management strategies in place, many of them have become less effective in curtailing SCN populations. University of Illinois and USDA plant pathologists M.L. Pawlowski and G.L. Hartman, respectively, have been involved in an on-going effort to increase soybean productivity by reducing soybean diseases and pests. Their latest research found that arbuscular mycorrhizal fungi in a potential tool in SCN management.

Arbuscular mycorrhizal fungi (AMF) form symbiotic relationships with the roots of most plants, including soybean. Previous research has shown that these fungi can reduce the severity of plant disease caused by pathogens and pests including SCN. Pawlowski and Hartman set out to understand how AMF suppress SCN populations.

In one experiment they found that several different AMF species from different families reduced the number of cysts on soybean roots by 59 to 80 percent. They also found that one AMF species reduced counts of SCN by 60 percent and was able to suppress egg hatching by as much as 30 percent.

"We were surprised to find that AMF was so good at repressing SCN," said Hartman. "This opens up new avenues of research, which is needed to determine the efficacy of using AMF in field conditions, with a goal of providing another management tool to reduce the impact of SCN on soybean production."

Hartman also suggests that industries interested in biological control using arbuscular mycorrhizal fungi might consider commercializing the strain (F. mosseae) that was effective in reducing SCN. For more information, read ".
-end-


American Phytopathological Society

Related Soybean Articles from Brightsurf:

Isoflavones in soybean help protect pigs against viral infections
Pigs that eat soybean as a regular part of their diet may be better protected against viral pathogens, a new study from University of Illinois shows.

Soybean seeding rates and risk
Broad study helps define optimal soybean seeding rates in North America.

Researchers find significant economic losses due to soybean diseases
Economic losses due to soybean diseases in the United States from 1996 to 2016 amounted to more than $95 billion, according to a team of researchers in Penn State's College of Agricultural Sciences who examined the long-term impact of soybean diseases on production in the U.S.

Soybean Innovation Lab provides knowledge that assists soybean production in Africa
The Soybean Innovation Lab (SIL), housed in the College of Agricultural, Consumer and Environmental Sciences at the University of Illinois, is funded by USAID's Feed the Future initiative to help bring research-based innovation and technology to develop soybean production in Sub-Saharan Africa.

Fungus application thwarts major soybean pest, study finds
The soybean cyst nematode sucks the nutrients out of soybean roots, causing more than $1 billion in soybean yield losses in the U.S. each year.

Organic soybean producers can be competitive using little or no tillage
Organic soybean producers using no-till and reduced-tillage production methods that incorporate cover crops -- strategies that protect soil health and water quality -- can achieve similar yields at competitive costs compared to tillage-based production.

Genes controlling mycorrhizal colonization discovered in soybean
Like most plants, soybeans pair up with soil fungi in a symbiotic mycorrhizal relationship.

Complete genome of devastating soybean pathogen assembled
An international research collaboration has successfully assembled the complete genome sequence of the pathogen that causes the devastating disease Asian soybean rust.

Chinese scientists update soybean genome to a golden reference
Soybean is one of the most important crops worldwide. A high-quality reference genome will facilitate its functional analysis and molecular breeding.

Illinois study identifies a key to soybean cyst nematode growth
The soybean cyst nematode, one of the crop's most destructive pests, isn't like most of its wormy relatives.

Read More: Soybean News and Soybean Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.