Navigation Links
Some trees 'farm' bacteria to help supply nutrients
Date:7/29/2010

Some trees growing in nutrient-poor forest soil may get what they need by cultivating specific root microbes to create compounds they require. These microbes are exceptionally efficient at turning inorganic minerals into nutrients that the trees can use. Researchers from France report their findings in the July 2010 issue of the journal Applied and Environmental Microbiology.

"In acidic forest soils, availability of inorganic nutrients is a tree-growth-limiting factor. A hypothesis to explain sustainable forest development proposes that tree roots select soil microbes involved in central biogeochemical processes, such as mineral weathering, that may contribute to nutrient mobilization and tree nutrition," says Stphane Uroz, an author on the study.

Certain microbes are efficient at breaking down inorganic minerals into nutrients. This process, called mineral weathering, is especially important in acidic forest soils where tree growth can be limited by access to these nutrients. Mineral-weathering bacteria can release necessary nutrients such as iron from soil minerals. This gives trees with increased concentrations of mineral-weathering microbes an advantage over other trees.

Distinct impacts of the tree species on the soil bacterial community structure have been previously reported, suggesting that the composition and activity of soil bacterial communities depend on tree physiology and notably on its impact on the soil physicochemical properties and nutrient cycling. However, no study has ever addressed the question of the impact of tree species on the structure of forest soil bacterial communities involved in mineral weathering.

"This question regarding the impact of tree species on the functional diversity of the bacterial communities remains a major issue in forestry, especially in the context of today's climate change, which will give rise to a shift in the spatial distribution of forest tree species" says Uroz.

The researchers took soil samples from the root areas of beech, oak and Norway spruce trees and cultured them to determine the bacterial populations. They observed heightened levels of mineral-weathering bacteria in the samples near the roots of oak and beech trees compared to surrounding soil samples. This difference was not seen in the Norway spruce samples.

"Our results suggest that certain tree species have developed indirect strategies for mineral weathering in nutrient-poor soils, which lie in the selection of bacterial communities with efficient mineral weathering potentials" says Uroz.


'/>"/>

Contact: Garth Hogan
ghogan@asmusa.org
American Society for Microbiology
Source:Eurekalert

Related biology news :

1. A future with or without trees
2. Flowers do it, trees do it: Symposium on plant reproduction
3. Greener horizons: Plastics may grow on trees
4. Fire may be key to reviving dogwood trees in Eastern forests
5. Rosewood trees face extinction amid Madagascars chaos
6. Using remote sensing to track invasive trees
7. Low-tech cool: Shade trees for subtropical streets
8. Urban wildlife: Some birds crave cement, not trees
9. ARS scientists develop self-pollinating almond trees
10. Trees retaliate when their fig wasps dont service them
11. Solutions to climate change: Using trees and grasses to capture carbon and produce energy
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/3/2016)... VILNIUS, Lithuania , May 3, 2016 /PRNewswire/ ... today released the MegaMatcher Automated Biometric Identification ... deployment of large-scale multi-biometric projects. MegaMatcher ABIS can ... and accuracy using any combination of fingerprint, face ... of MegaMatcher SDK and MegaMatcher ...
(Date:4/26/2016)... , April 27, 2016 ... "Global Multi-modal Biometrics Market 2016-2020"  report to their ... , The analysts forecast the global ... of 15.49% during the period 2016-2020.  ... of sectors such as the healthcare, BFSI, transportation, ...
(Date:4/14/2016)... BioCatch ™, the global ... the appointment of Eyal Goldwerger as CEO. ... Goldwerger,s leadership appointment comes at a time of significant ... of its platform at several of the world,s largest ... unique cognitive and physiological factors, is a winner of ...
Breaking Biology News(10 mins):
(Date:5/19/2016)... , May 19, 2016 ... una sessione orale durante il 52 ° ... n. 8006)    - Le conclusioni dello ... riguarda i pazienti trattati, di cui il 90% presenta una ... sei mesi o più. Il settantadue per cento dei pazienti ...
(Date:5/18/2016)... ... 18, 2016 , ... STACS DNA Inc., the sample tracking software company, today ... assault kit processing to help them save time and reduce errors. , Sexual Assault ... be processed and victims informed of results. Due to a previous lack of tools, ...
(Date:5/17/2016)... 2016 Haselmeier announces the launch ... approval by EMA, the European Medicines Agency. Originally launched ... company, the new pen version includes enhancements to further ... confidence to patients during use. Its enhanced ... to handle with a larger display window that improves ...
(Date:5/17/2016)... (PRWEB) , ... May 17, 2016 , ... The Children’s ... bridges, and monuments across the globe will show their support in the fight against ... , Neurofibromatosis, NF, is a genetic disorder that causes tumors to grow on nerves ...
Breaking Biology Technology: