Featured Research

from universities, journals, and other organizations

Wiping Out White Mould In Soybeans

Date:
April 5, 2000
Source:
University Of Guelph
Summary:
Soybeans are being genetically enhanced to boost their resistance to a pest that causes millions of dollars of damage annually in one of Ontario's leading crops.

Soybeans are being genetically enhanced to boost their resistance to a pest that causes millions of dollars of damage annually in one of Ontario's leading crops.

Related Articles


The problem is being addressed by a research team led by Daina Simmonds of Agriculture and Agri-Food Canada (AAFC). Other members of the team include AAFC's Elroy Cober, Terry Anderson, Pauline Donaldson, Sheryl Hubbard, Jiping Zhao, and Isabelle Joanisse, as well as University of Guelph Plant Agriculture Prof. Istvan Rajcan, and Sylvie Rioux of Laval University.

They've been working since 1996 to develop a transgenic soybean line that is resistant to a fungus called white mould, which reduces yields and costs about six million dollars each year. The team has transferred a wheat gene, which was discovered by Prof. Byron Lane of the University of Toronto, into soybean plants. This gene produces a protein called oxalate oxidase (OxO), which the team has found to be effective in preventing white mould.

White mould proliferates in cool, wet or humid weather, conditions that are typical in Ontario during late summer months. The fungus is a double-edged pathogen that affects soybean yields in two ways. White mould secretes an acid called oxalic acid, which weakens soybean plant cell walls and makes the cells more prone to infection. Once plant tissues are infected with white mould, seed growth and maturation are retarded, thus reducing yield. Fungus maturing on soybean plants also produce sclerotia -black pebble-like hard bodies - inside the stem of the plant. Sclerotia are then harvested with the soybean, reducing its market value.

There are currently no commercial soybean cultivars with a high level of resistance to white mould. A resistant soybean cultivar could benefit growers by improving yield and allowing recovery of clean seed (without sclerotia). Seed free of sclerotia are highly valued in food-grade soybeans, giving exporters a market advantage.

The ability of modified soybean plants to resist white mould was tested under growth-room conditions. For the study, soybean plants were wounded and then infected with the white mould pathogen. Plants modified with OxO showed greater resistance to fungal invasion than non-modified lines.

Two years of field-testing at Ottawa, Ste. Foy and Elora also confirmed that modified lines can effectively resist white mould invasion and contamination with sclerotia. But these varieties aren't completely resistant to white mould infection.

"A small number of plants still develop a low level of disease," says Simmonds. "Ultimately, our goal is to produce soybean lines with complete resistance to white mould."

The team will be introducing other defense genes into modified soybean lines to further improve resistance against white mould in the future.

This research was sponsored by the Ontario Soybean Growers and by the Ontario Research Enhancement Program, a $4-million federally funded research initiative administered by the Research Branch of AAFC with input from the agriculture and agri-food sector, universities and the province. OREP supports 25 research projects in universities and research centres across the province, with the University of Guelph as a major participant. Projects focus on two key areas identified by the agriculture and agri-food community:consumer demand for higher quality safe products and ensuring crop production management systems that are environmentally sustainable.


Story Source:

The above story is based on materials provided by University Of Guelph. Note: Materials may be edited for content and length.


Cite This Page:

University Of Guelph. "Wiping Out White Mould In Soybeans." ScienceDaily. ScienceDaily, 5 April 2000. <www.sciencedaily.com/releases/2000/04/000403113722.htm>.
University Of Guelph. (2000, April 5). Wiping Out White Mould In Soybeans. ScienceDaily. Retrieved January 26, 2015 from www.sciencedaily.com/releases/2000/04/000403113722.htm
University Of Guelph. "Wiping Out White Mould In Soybeans." ScienceDaily. www.sciencedaily.com/releases/2000/04/000403113722.htm (accessed January 26, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, January 26, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How To: Mixed Green Salad Topped With Camembert Cheese

How To: Mixed Green Salad Topped With Camembert Cheese

Rumble (Jan. 26, 2015) Learn how to make a mixed green salad topped with a pan-seared camembert cheese in only a minute! Music: Courtesy of Audio Network. Video provided by Rumble
Powered by NewsLook.com
Water Fleas Prepare for Space Voyage

Water Fleas Prepare for Space Voyage

Reuters - Innovations Video Online (Jan. 26, 2015) Scientists are preparing a group of water fleas for a unique voyage into space. The aquatic crustaceans, known as Daphnia, can be used as a miniature model for biomedical research, and their reproductive and swimming behaviour will be tested for signs of stress while on board the International Space Station. Jim Drury went to meet the team. Video provided by Reuters
Powered by NewsLook.com
Husky Puppy Plays With Ferret

Husky Puppy Plays With Ferret

Rumble (Jan. 26, 2015) It looks like this 2-month-old Husky puppy and the family ferret are going to be the best of friends. Look at how much fun they&apos;re having together! Credit to &apos;Vira&apos;. Video provided by Rumble
Powered by NewsLook.com
Scientists Model Flying, Walking Drone After Vampire Bats

Scientists Model Flying, Walking Drone After Vampire Bats

Buzz60 (Jan. 26, 2015) Swiss scientists build a new drone that can both fly and walk, modeling it after the movements of common vampire bats. Jen Markham (@jenmarkham) has the story. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins