Navigation Links
Arsenic hyperaccumulating ferns: How do they survive?
Date:6/8/2010

Arsenic is toxic to most forms of life, and occurs naturally in soil and ground water in many regions of the world. Chronic exposure to arsenic has been linked to lung, bladder and kidney cancer, and thus there are strict limits on allowable levels or arsenic in drinking water. Chemically similar to phosphorus, arsenic forms arsenate (AsO43-), which closely resembles phosphate (PO43-). Arsenate interferes with many phosphate-requiring metabolic reactions, including synthesis of adenosine triphosphate (ATP), a ubiquitous and essential source of cellular energy. Thus, exposure to even low levels of arsenic can be extremely toxic.

In well-aerated soils, arsenic exists mainly as arsenate, which is taken up by plant roots using a phosphate transporter protein. Plant tissues rapidly reduce arsenate to arsenite (AsO33-), which is transported to the aerial portions of the plant. In aquatic environments or water-logged soils, arsenic exists primarily as arsenite. Whereas rice grains can accumulate up to 60 μg/g arsenic, the fern Pteris vittata (see figure) can hyperaccumulate arsenic to levels 1000-fold greater than this. A team of researchers led by David Salt and Jo Ann Banks of Purdue University have recently isolated a gene encoding an arsenite transporter protein. This transporter allows these ferns to sequester arsenic in the vacuole, a cellular storage compartment isolated from the cytoplasm by the vacuolar membrane.

In research published this week in The Plant Cell and performed primarily by graduate student Emily Indriolo (now a researcher at the University of Toronto), these scientists describe how they used an arsenic-sensitive strain of yeast to isolate and characterize a gene encoding the P. vittata arsenite transporter. Yeast cells are arsenic-resistant because their plasma membrane contains an arsenite effluxer protein that is encoded by the <
'/>"/>

Contact: Gregory Bertoni
gbertoni@aspb.org
614-949-3659
American Society of Plant Biologists
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Lehigh University professor receives Astellas Award for arsenic groundwater remediation efforts
2. Geologists studying groundwater arsenic levels in India empower Bengali women, children
3. Stanford scientists find new solutions for the arsenic-poisoning crisis in Asia
4. Montana State team finds Yellowstone alga that detoxifies arsenic
5. Arsenic and old toenails
6. Living sensor can warn of arsenic pollution
7. Arsenic and new rice
8. Dartmouth researchers alarmed by levels of mercury and arsenic in Chinese freshwater ecosystem
9. Arsenic contamination lacks one-size-fits-all remedy
10. MIT: Prenatal arsenic exposure detected in newborns
11. Dartmouth researchers show effects of low dose arsenic on development
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Arsenic hyperaccumulating ferns: How do they survive?
(Date:11/5/2014)... biology in the UTSA College of Sciences, is ... to receive a two-year $300,00 National Science Foundation ... The funding supports President Obama,s BRAIN Initiative, a ... technology that will demystify complex brain processes. ... are broken into the interactions of multiple components, ...
(Date:11/4/2014)... of Utah engineers developed the first room-temperature fuel cell ... without needing to ignite the fuel. These new fuel ... power and sensors. , A study of the new ... journal ACS Catalysis . , Fuel cells convert ... fuel and an oxygen-rich source such as air. If ...
(Date:11/4/2014)... — Think about the way our bodies are assembled ... know that they are supposed to become a nerve ... find the correct place and alignment? Researchers at the ... , In a new study, UM researchers describe the ... surrounding neighbors, at the head-trunk region. Their discovery may ...
Breaking Biology News(10 mins):UTSA biology professor awarded $300,000 NSF grant for brain research 2UTSA biology professor awarded $300,000 NSF grant for brain research 3Jet-fueled electricity at room temperature 2The inside story: How the brain and skull stay together 2
... And if one wants to make something work using ... behavior of cells is a good place to start ... a very tiny packet. As Erik Winfree, professor of ... "I tend to think of cells as really small ...
... Rett Syndrome Foundation (IRSF) announces today ten (10) new ... Translational Research Program; and additional funding for current human ... 2013 covers the spectrum of Rett syndrome research, from ... way to treating the girls diagnosed with Rett syndrome. ...
... more than a trillion cells called neurons that form a ... contains millions of proteins that perform different functions. Exactly how ... brain still remains as a mystery that is just beginning ... of scientists has been able to observe intact interactions between ...
Cached Biology News:Building artificial cells will be a noisy business 2Building artificial cells will be a noisy business 3IRSF announces 2013 awards and implements new Translational Program 2IRSF announces 2013 awards and implements new Translational Program 3Watching how the brain works 2
(Date:11/26/2014)... PHILADELPHIA , Nov. 26, 2014 /PRNewswire-USNewswire/ ... unforgiving environments. Human exploration of space requires astronauts to ... mission safety and success, and prevent potential errors and ... success, little is known about how cognition is affected ... primarily affected. Now, Penn Medicine researchers are ...
(Date:11/26/2014)... On January, 14, 2015, UMBC’s Biotechnology ... science community to the UMBC campus for a discussion ... Protein Society, will take place from 9 a.m. to ... Through discussion, presentations and workshops, the free symposium will ... role in the industry and the future of protein ...
(Date:11/26/2014)... PMG Research, Inc. announced today the formation ... of sites that provide clinical research services to pharmaceutical companies ... through its partnerships with large physician practices and integrated health ... in the Southeastern United States and spans over 60 physician ... will be held by: Dr. Robert Holmes, MD, of ...
(Date:11/26/2014)... NC (PRWEB) November 25, 2014 ... Intensity Focused Ultrasound (HIFU) devices, recently participated in ... Small Renal Mass 360° .” Key opinion leaders ... therapeutic advances related to small renal masses while ... about different ablative technologies in hands-on labs. Attendees ...
Breaking Biology Technology:Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 2Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 3Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 4PMG Research Names Medical Advisory Board 2PMG Research Names Medical Advisory Board 3SonaCare Medical Supports American Urology Association’s Small Renal Mass 360° Summit 2SonaCare Medical Supports American Urology Association’s Small Renal Mass 360° Summit 3
... Nov. 15 China Aoxing Pharmaceutical,Company, Inc. (OTC ... and product pipeline for highly regulated narcotic,medicines and ... the first quarter of fiscal 2008 ended September ... revenues of $1,380,294 for,the first quarter of fiscal ...
... Final Close Completes $35 Million Financing, WOBURN, Mass., ... new generation biologics for the treatment and,prevention of cancer ... E financing, concurrent with the completion of a,venture debt ... BioVex intends to use the capital to complete its ...
... NASA Goddard Space Flight Center in Greenbelt, Md. ... nanotubes (CNT) has been named a winner in the ... Technology category. This award will be celebrated at the ... Tech Briefs National Nano Engineering Conference (NNEC 2007) in ...
Cached Biology Technology:China Aoxing Pharmaceutical Reports Financial Results for the First Quarter of Fiscal 2008 2China Aoxing Pharmaceutical Reports Financial Results for the First Quarter of Fiscal 2008 3China Aoxing Pharmaceutical Reports Financial Results for the First Quarter of Fiscal 2008 4China Aoxing Pharmaceutical Reports Financial Results for the First Quarter of Fiscal 2008 5BioVex Closes Second Round of Series E Financing 2NASA Goddard Space Flight Center's carbon nanotube manufacturing technology wins Nano 50 Award 2
Immunogen: Extract of pigmented melanoma metastases from lymph nodes. Storage: -20 C, Avoid Freeze/Thaw Cycles...
with GlutaMAXIL-glutamine...
alpha N-catenin (C-19)...
This STAT antibody sampler pack contains 8 monoclonal ,STAT antibodies....
Biology Products: