Navigation Links
Genome offers clue to functions of destructive wheat fungus
Date:6/13/2011

WEST LAFAYETTE, Ind. - One of the world's most destructive wheat pathogens is genetically built to evade detection before infecting its host, according to a study that mapped the genome of the fungus.

Stephen Goodwin, a Purdue and U.S. Department of Agriculture research plant pathologist, was the principal author on the effort to sequence the genome of the fungus Mycosphaerella graminicola, which causes septoria tritici blotch, a disease that greatly reduces yield and quality in wheat. Surprisingly, Goodwin said, the fungus had fewer genes related to production of enzymes that many other fungi use to penetrate and digest surfaces of plants while infecting them.

"We're guessing that the low number of enzymes is to avoid detection by plant defenses," said Goodwin, whose findings were published in the early online edition of the journal PLoS Genetics.

Enzymes often break down plant cell walls and begin removing nutrients, leading to the plant's death. M. graminicola, however, enters the plant through stomata, small pores in the surface of leaves that allow for exchange of gases and water.

Goodwin said the fungus seems to lay dormant between plant cells, avoiding detection. It later infects the plant, removing necessary nutrients and causing disease.

With the sequenced genome, scientists hope to discover which genes cause toxicity in wheat and determine ways to eliminate that toxicity or improve wheat's defenses against the fungus. Septoria tritici blotch is the No. 1 wheat pathogen in parts of Europe and is probably third in the United States, Goodwin said.

The genome also showed that M. graminicola has eight disposable chromosomes that seem to have no function. Goodwin said that plants with dispensable chromosomes have clear mechanisms for their maintenance, but no such mechanisms were obvious in the fungus.

Goodwin said the extra chromosomes were probably obtained from another species more than 10,000 years ago and have likely been retained for an important function, but it's not clear what that function is.

"That's a long time for these chromosomes to be maintained without an obvious function," he said. "They must be doing something important. Finding out what that is will be a key area for future research."


'/>"/>

Contact: Brian Wallheimer
bwallhei@purdue.edu
765-496-2050
Purdue University
Source:Eurekalert

Related biology news :

1. Genome sequence could reveal Achilles heels of important wheat disease
2. Gerry A. Higgins, Ph.D. Joins GenomeQuest to Foster Development of Whole Genome Diagnostics
3. Einstein offers easy-to-use genome analyzer to scientific community
4. BGI releases a complete de novo E. coli O104 genome and details of their detection kit
5. BGI sequences genome of the deadly E. coli in Germany and reveals new super-toxic strain
6. Of mice and men: UNC-led team solves mouse genome dilemma
7. Comparison of genomes of plant parasites provides solid clues for response
8. Eucalyptus tree genome deciphered
9. Discovery of DNA silencing mechanism reveals how plants protect their genome
10. The $1,000 genome may cost $100,000 to understand
11. USDA researchers, collaborators sequence genomes of fungi that threaten wheat, poplars
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/15/2016)... CHICAGO , April 15, 2016  A ... companies make more accurate underwriting decisions in a ... offering timely, competitively priced and high-value life insurance ... health screenings. With Force Diagnostics, rapid ... and lifestyle data readings (blood pressure, weight, pulse, ...
(Date:4/13/2016)... , April 13, 2016  IMPOWER physicians supporting ... are setting a new clinical standard in telehealth thanks ... By leveraging the higi platform, IMPOWER patients can routinely ... pulse and body mass index, and, when they opt ... and convenient visit to a local retail location at ...
(Date:3/29/2016)... 29, 2016 LegacyXChange, Inc. (OTC: ... and SelectaDNA/CSI Protect are pleased to announce our successful ... a variety of writing instruments, ensuring athletes signatures against ... collectibles from athletes on LegacyXChange will be assured of ... DNA. Bill Bollander , CEO states, ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... 23, 2016 , ... UAS LifeSciences, one of the leading ... UP4™ Probiotics, into Target stores nationwide. The company, which has been manufacturing high ... its list of well-respected retailers. This list includes such fine stores as Whole ...
(Date:6/23/2016)... , June 23, 2016 /PRNewswire/ - FACIT has ... Ontario biotechnology company, Propellon Therapeutics Inc. ... and commercialization of a portfolio of first-in-class WDR5 ... targets such as WDR5 represent an exciting class ... in precision medicine for cancer patients. Substantial advances ...
(Date:6/23/2016)... , June 23, 2016 Houston ... with the Cy-Fair Sports Association to serve as ... the agreement, Houston Methodist Willowbrook will provide sponsorship ... and connectivity with association coaches, volunteers, athletes and ... with the Cy-Fair Sports Association and to bring ...
(Date:6/23/2016)... June 23, 2016  The Prostate Cancer Foundation (PCF) is pleased ... and faster cures for prostate cancer. Members of the Class of 2016 were ... Read More About the Class of 2016 PCF Young ... ... ...
Breaking Biology Technology: