Navigation Links
ISU researchers help map first plant-parasitic nematode genome sequence
Date:9/4/2008

AMES, Iowa -- There are numerous plant-parasitic nematodes in the world, but only a handful are responsible for the largest part of an estimated $157 billion in agricultural damage globally every year. Nematodes are small worms that burrow into plant roots and feed off living cells.

Now, Iowa State University researchers have contributed to the release of the annotated genome of one of the most destructive nematodes: Meloidogyne incognita -- the southern root-knot nematode, as reported recently in the journal Nature Biotechnology.

Sequencing the genome is a critical step toward comprehensively understanding how the organism works and may pave the way for research on ways to fight the pest.

"This is considered to be one of, if not the most important plant-parasitic nematode species across the world," said Thomas Baum, professor and chair of plant pathology and head of Iowa State University's contribution to the genome sequence project.

Root-knot nematodes are so important because they can be found almost anywhere in the world on almost any plant, he said. Nematodes are the most abundant animals on earth.

"Many of the nematodes that are really bad pathogens are very specialized on which plant they attack," said Baum. "This nematode has a huge host range. For us nematologists, it is very interesting and challenging to study."

Because the pest is so widespread, many nematologists around the world were eager to help with the project. The lead investigator was Pierre Abad of the Insitut National de Recherche Agronomiquea, a French research group, with help from researchers in Belgium, Holland, Great Britain, Switzerland, and Iowa State University and North Carolina State University in the US.

"Because it is such a worldwide problem, people are eager to contribute," Baum said. "Also, because it is the first plant-parasitic nematode to have its sequence released, people are very excited about it."

Chemical treatments for killing nematodes, called nematicides, are dangerous to humans and other animals so they've been restricted in use for decades. Technology for controlling nematodes has advanced little in the past three decades.

Besides being a devastating crop pathogen, Meloidogyne incognita has some remarkable biological adaptations that make it a fascinating organism to study.

Baum said that the sex of the tiny worms, or better the lack thereof is very intriguing. Only females reproduce and they do so without having sex, so it remains a puzzle why males of the species even exist. And since the females don't mate to reproduce, the offspring should be genetically identical to the mother -- like a clone - but they aren't. And as the offspring matures into males or females, some start as females and then change into males.

Baum's group included postdoctoral researcher Tarek Hewezi and assistant scientist Tom Maier from Iowa State. The three worked on a specific part of the genome and performed manual annotations of genes. Professor Davis and postdoctoral research associate, Noureddine Hamamouch, used the current known parasitism genes to identify the full suite or predicted parasitism genes in the root-knot nematode genome.

With this sequencing done, Baum thinks researchers can now try to understand this nematode. He also cautions that finding ways to control this pest will be a long process.

"For any effort in which you want to control the nematode, this is a great resource," Baum said. "But having the genome is only one of many steps in the right direction. Albeit, a very big one!"


'/>"/>

Contact: Thomas Baum
tbaum@iastate.edu
515-294-2398
Iowa State University
Source:Eurekalert

Related biology news :

1. Researchers identify proteins involved in new neurodegenerative syndrome
2. Texas researchers and educators head for Antarctica
3. MGH researchers describe new way to identify, evolve novel enzymes
4. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
5. U of MN researchers discover noninvasive diagnostic tool for brain diseases
6. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
7. Researchers discover new strategies for antibiotic resistance
8. Researchers find new taste in fruit flies: carbonated water
9. Binghamton University researchers investigate evolving malaria resistance
10. UIC researchers find promising new targets for antibiotics
11. Researchers develop simple method to create natural drug products
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/20/2016)... , June 20, 2016 Securus Technologies, ... technology solutions for public safety, investigation, corrections and ... prisons involved, it has secured the final acceptance ... facilities for Managed Access Systems (MAS) installed. Furthermore, ... facilities to be installed by October, 2016. MAS ...
(Date:6/7/2016)...  Syngrafii Inc. and San Antonio Credit Union ... integrating Syngrafii,s patented LongPen™ eSignature "Wet" solution into ... result in greater convenience for SACU members and ... existing document workflow and compliance requirements. ... Highlights: ...
(Date:6/1/2016)... 2016 Favorable Government Initiatives Coupled ... Criminal Identification to Boost Global Biometrics System Market Through ... Research report, " Global Biometrics Market By Type, ... Opportunities, 2011 - 2021", the global biometrics market is ... account of growing security concerns across various end use ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... 2016 , ... Velocity Products, a division of Morris Group, ... exclusively for Okuma CNC machining centers at The International Manufacturing Technology Show, IMTS, ... companies with expertise in toolholding, cutting tools, machining dynamics and distribution, Velocity SMART ...
(Date:6/22/2016)... 2016 Research and Markets has announced the ... to their offering. The ... $29.3 billion in 2013. The market is expected to grow at ... to 2020, increasing from $50.6 billion in 2015 to $96.6 billion ... the forecast period (2015 to 2020) are discussed. As well, new ...
(Date:6/22/2016)...   ViaCyte, Inc. , a privately-held regenerative medicine ... therapy for the treatment of diabetes in clinical-stage development, ... ISSCR 2016, the Global Stem Cell Event, is taking ... San Francisco.    ... , Focus Session: Tools for Basic and Applied Stem ...
(Date:6/22/2016)... and ALBANY, N.Y. , ... (Teewinot) and Albany Molecular Research, Inc. (NASDAQ: ... licensed Teewinot,s technology to produce and sell the ... The CBCA analytical standard is manufactured using Teewinot,s ... expression of cannabinoid biosynthetic genes in microorganisms for ...
Breaking Biology Technology: