Navigation Links
In tackling lead pollution, fungi may be our friends

Fungi may be unexpected allies in our efforts to keep hazardous lead under control. That's based on the unexpected discovery that fungi can transform lead into its most stable mineral form. The findings reported online on January 12 in Current Biology, a Cell Press publication, suggest that this interaction between fungi and lead may be occurring in nature anywhere the two are found together. It also suggests that the introduction or encouragement of fungi may be a useful treatment strategy for lead-polluted sites.

"Lead is usually regarded as a pretty stable substance," said Geoffrey Gadd of the University of Dundee. "The idea that fungi and other microbes may attack it and change its form is quite unexpected."

Lead is an important structural and industrial material and, as an unfortunate consequence of its popular use in everything from firearms to paint, lead contamination is a serious problem worldwide. There have been efforts to contain lead in contaminated soils through the addition of sources of phosphorus, an element that enables the incorporation of lead into a stable pyromorphite mineral. But that change had been considered a purely chemical and physical phenomenon, not a biological one. That is, until now.

In the new study, the researchers carefully examined lead shot after it had been incubated with and without fungi. In the presence of fungi, the lead shot began to show evidence of pyromorphite formation after one month's time. That stable lead-containing mineral continued to increase in abundance with time. Minerals found on the surface of lead shot incubated without fungi represented less stable forms as a result of normal corrosion.

"It seems the ability of many fungi to produce organic acids or other substances may be very important in attacking the lead and releasing forms of free lead including lead complexes, which can then react with phosphorus sources to form pyromorphite," Gadd explained.

While not all species of fungus are able to transform lead in this way, it appears that many of them can, he added. It's not entirely clear why some fungi do this, but it might assist their survival in contaminated soils.

The discovery is yet another example of the "amazing things that fungi, and microbes more generally, can do in the environment," says Gadd. "Even metals can be subject to microbial colonization and attack."

Contact: Lisa Lyons
Cell Press

Related biology news :

1. Stampede charges computational science forward in tackling complex societal challenges
2. Spin-out to apply new technology for tackling infection
3. Europes scientists call for more effort in tackling rising ocean acidity
4. Tackling the challenges of survival in a changing world
5. Tackling transport and environment in Africa
6. Tackling childhood obesity at the local level -- IOM report releases Sept. 1
7. New link between pollution, temperature and sleep-disordered breathing
8. Invasive kudzu is major factor in surface ozone pollution, study shows
9. Identify clinically relevant fungi confidently and accurately
10. Good preparation is key -- even for plant cells and symbiotic fungi
11. From compost to sustainable fuels: Heat-loving fungi sequenced
Post Your Comments:
(Date:6/22/2016)... Md. , June 22, 2016  The American College ... Trade Show Executive Magazine as one of the ... on May 25-27 at the Bellagio in Las ... on the highest percentage of growth in each of the ... of exhibiting companies and number of attendees. The 2015 ACMG ...
(Date:6/22/2016)... WASHINGTON , June 22, 2016 On ... highly-anticipated call to industry to share solutions for the ... by U.S. Customs and Border Protection (CBP), explains that ... nationals are departing the United States ... criminals, and to defeat imposters. Logo - ...
(Date:6/20/2016)... June 20, 2016 Securus Technologies, a ... solutions for public safety, investigation, corrections and monitoring ... involved, it has secured the final acceptance by ... for Managed Access Systems (MAS) installed. Furthermore, Securus ... to be installed by October, 2016. MAS distinguishes ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 27, 2016  Liquid Biotech USA ... of a Sponsored Research Agreement with The University ... (CTCs) from cancer patients.  The funding will be ... correlate with clinical outcomes in cancer patients undergoing ... then be employed to support the design of ...
(Date:6/24/2016)... ... , ... While the majority of commercial spectrophotometers and fluorometers use the z-dimension ... are higher end machines that use the more unconventional z-dimension of 20mm. Z-dimension ... bottom of the cuvette holder. , FireflySci has developed several Agilent flow cell ...
(Date:6/23/2016)... , June 23, 2016   Boston ... of novel compounds designed to target cancer stemness ... has been granted Orphan Drug Designation from the ... treatment of gastric cancer, including gastroesophageal junction (GEJ) ... inhibitor designed to inhibit cancer stemness pathways by ...
(Date:6/23/2016)... ... 2016 , ... Charm Sciences, Inc. is pleased to announce ... Research Institute approval 061601. , “This is another AOAC-RI approval of the Peel ... President of Regulatory and Industrial Affairs. “The Peel Plate methods perform comparably to ...
Breaking Biology Technology: