Characterization of elemental release during microbe–granite interactions at T=28°C

Wu, Lingling; Jacobson, Andrew D.; Chen, Hsin Chieh; Hausner, Martina

doi:10.1016/j.gca.2007.11.025

Cited by 78 publications

(56 citation statements)

References 120 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4) to weather biotite. The mineral weathering efficacy of strains of the Burkholderiales was previously reported for other minerals, such as apatite, basalt, and granite (33,(52)(53). We also revealed that the weathering potential varies greatly depending on the isolates: about 40% of the isolates belonging to the Burkholderia genus did not weather biotite under our experimental conditions (Fig.…”

Section: Resultssupporting

confidence: 83%

Influence of Forest Trees on the Distribution of Mineral Weathering-Associated Bacterial Communities of the Scleroderma citrinum Mycorrhizosphere

Calvaruso¹,

Turpault²,

Leclerc

et al. 2010

Appl Environ Microbiol

View full text Add to dashboard Cite

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. Here we showed, by combining soil analyses with cultivation-dependent analyses of the culturable bacterial communities associated with the widespread mycorrhizal fungus Scleroderma citrinum, a significant enrichment of bacterial isolates with efficient mineral weathering potentials around the oak and beech mycorrhizal roots compared to bulk soil. Such a difference did not exist in the rhizosphere of Norway spruce. The mineral weathering ability of the bacterial isolates was assessed using a microplaque assay that measures the pH and the amount of iron released from biotite. Using this microplate assay, we demonstrated that the bacterial isolates harboring the most efficient mineral weathering potential belonged to the Burkholderia genus. Notably, previous work revealed that oak and beech harbored very similar pHs in the 5-to 10-cm horizon in both rhizosphere and bulk soil environments. In the spruce rhizosphere, in contrast, the pH was significantly lower than that in bulk soil. Because the production of protons is one of the main mechanisms responsible for mineral weathering, 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.

show abstract

Section: Resultssupporting

confidence: 83%

Influence of Forest Trees on the Distribution of Mineral Weathering-Associated Bacterial Communities of the Scleroderma citrinum Mycorrhizosphere

Calvaruso¹,

Turpault²,

Leclerc

et al. 2010

Appl Environ Microbiol

View full text Add to dashboard Cite

show abstract

“…1E). The production of gluconic acid from glucose during respiration has previously been observed with Burkholderia fungorum (11,46,48). Gluconic acid is typically further oxidized by bacteria but can accumulate under stress (12).…”

mentioning

confidence: 87%

“…Previous microcosm experiments with phosphatelimited AGW and basalt or granite have shown that little to no cell growth occurs in the absence of a mineral phosphate source and that apatite was most likely the source of phosphate (47,48). Plating and flow cytometer analyses during the initial experiments indicated that without phosphate or apatite, significantly less growth occurred.…”

mentioning

confidence: 92%

mentioning

confidence: 99%

“…Specifically, experiments with basalt and granite have shown that it can weather these rocks and release phosphate into the environment (47,48). Members of the Burkholderia genus have been isolated from granitic soils (48) and have been shown to be efficient at mineral weathering (40). Unfortunately, little work has been done to characterize microbial populations in the aquifers and soils of Southeast Asia, and isolates were not available (9,19,20).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Microbial Mineral Weathering for Nutrient Acquisition Releases Arsenic

Mailloux

Alexandrova

Keimowitz

et al. 2009

Appl Environ Microbiol

View full text Add to dashboard Cite

Tens of millions of people in Southeast Asia drink groundwater contaminated with naturally occurring arsenic. How arsenic is released from the sediment into the water remains poorly understood. Here, we show in laboratory experiments that phosphate-limited cells of Burkholderia fungorum mobilize ancillary arsenic from apatite. We hypothesize that arsenic mobilization is a by-product of mineral weathering for nutrient acquisition. The released arsenic does not undergo a redox transformation but appears to be solubilized from the apatite mineral lattice during weathering. Analysis of apatite from the source area in the Himalayan basin indicates the presence of elevated levels of arsenic, with an average concentration of 210 mg/kg. The rate of arsenic release is independent of the initial dissolved arsenic concentration and occurs at phosphate levels observed in Bangladesh aquifers. We also demonstrate the presence of the microbial phenotype that releases arsenic from apatite in Bangladesh aquifer sediments and groundwater. These results suggest that microbial mineral weathering for nutrient acquisition could be an important mechanism for arsenic mobilization.

show abstract