Effect of calco-magnesian amendment on the mineral weathering abilities of bacterial communities in acidic and silicate-rich soils

Balland-Bolou-Bi, Clarisse; Poszwa, Anne

doi:10.1016/j.soilbio.2012.02.034

Cited by 21 publications

(10 citation statements)

References 35 publications

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“…In our HSG experiments with pure cultures of R. aquatilis RA1, the nature and the concentration of organic acids produced reflected what can be found in soil compartments (e.g. the rhizosphere of podzolic soils) as shown elsewhere (Jones ; Balland‐Bolou‐Bi and Poszwa ). These authors measured micromolar concentrations of oxalic, acetic and formic acids, ranging from 0·1 to 1000 μmol l −1 , as well as traces of other acids such as malic, citric and succinic acids.…”

Section: Discussionsupporting

confidence: 76%

Bioweathering of nontronite colloids in hybrid silica gel: implications for iron mobilization

et al. 2013

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Aims: This study aimed to study biotic iron dissolution using a new hybrid material constituted of well-dispersed mineral colloids in a silica gel matrix. This permitted to prevent adsorption of colloidal mineral particles on bacteria. Hybrid silica gel (HSG) permitted to study bioweathering mechanisms by diffusing molecules. Methods and Results: Hybrid silica gel was synthesized through a classical sol-gel procedure in which mineral colloidal particles (NAu-2) were embedded in a porous silica matrix. Rahnella aquatilis RA1, isolated from a wheat rhizosphere was chosen for its ability to dissolve minerals by producing various organic acids and siderophores. Pyruvic, acetic and lactic acids were the major organic acids produced by R. aquatilis RA1 followed by oxalic and citric acids at the end of incubation. Comparison of abiotic and biotic experiments revealed a high efficiency of R. aquatilis RA1 for iron dissolution suggesting an optimized action of different ligands that solubilized or mobilized iron. Conclusions: Hybrid silica gel allowed focusing on the colloidal mineral weathering by metabolites diffusion without mineral adsorption on bacteria. Significance and Impact of the Study: Hybrid silica gels are new and efficient tools to study colloidal mineral bioweathering. Adjusting HSG porosity and hydrophobicity should permit to precise the influence of limiting diffusion of siderophores or aliphatic organic acids on mineral weathering.

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Section: Discussionsupporting

confidence: 76%

Bioweathering of nontronite colloids in hybrid silica gel: implications for iron mobilization

et al. 2013

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“…These differences in the biochemical processes in the soil and in experimental conditions can be explained by the fact that communities extracted from these soils are the only bacteria that are able to survive under our experimental conditions and that less than 1% of total soil bacteria are cultivable. These results are quite reproducible and agree with the preliminary work performed using other types of soils and bacterial strains studied (Balland et al, 2010;Balland-Bolou-Bi and Poszwa, 2012). In addition, the work of Vandevivereet al (1994) highlighted the existence of a "highly reactive zone" in the bacteria micro-environment, where extreme physico-chemical conditions (pH and metabolites gradients) could induce more mineral dissolution than would be expected from bulk solution.…”

Section: Link Between Global Soil Profiles Key Habitat Determinants supporting

confidence: 84%

Experimental Study on the Phlogopite Weathering Potential of Bacterial Communities Isolated from Different Soil Profiles

Balland-Bolou-Bi¹,

Poszwa²,

Mustin³

2014

AIJB

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The silicate mineral weathering potential of different weathering pattern soil bacteria was characterized, and links between key habitat determinants and soil bacteria strategies were established in this work. Phlogopite weathering experiments were conducted under aerobic conditions and in closed systems with bacterial communities isolated from different soil profiles that are typical of a temperate climate. Our results suggest that the phlogopite weathering processes (i.e., acidolysis and complexolysis processes) of bacterial communities is determined by soil horizons as a function of (i) organic matter content, (ii) impoverishment in clays in leached horizons and (iii) the content of exchangeable cations. In our experiments, bacterial communities developed two strategies for iron release from phlogopite: the first was the K-strategy, which is used by bacterial communities extracted from soil rich in nutrient elements (especially in horizons with high contents of exchangeable Mg, Ca, etc.) and organic carbon. These communities produced strong chelating organic acids in low concentrations and used small amounts of carbon. The other was the r-strategy for bacterial communities extracted from soils poor in nutrient elements and organic carbon content. They produced weak chelating organic acids in large amounts and used a large proportion of the carbon source.

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“…among total cations, is significantly positively correlated with functional diversity ( p < 0.05, r 2 = 0.3676). Calcium and magnesium amendments have been shown to increase soil microbial diversity at soil horizon A1, which is within our sampling depth range (Balland‐Bolou‐Bi & Poszwa, 2012) suggesting base saturation as an important marker of soil microbial activity in the Point Loma Shaw's Agave habitat. The association between the plant and its microbiota is a critical aspect of plant fitness (Rodriguez & Durán, 2020; Rosenberg et al., 2010; Trivedi et al., 2020).…”

Section: Discussionsupporting

confidence: 72%

Relative genetic diversity of the rare and endangered Agave shawii ssp. shawii and associated soil microbes within a southern California ecological preserve

Vasquez

Feng

et al. 2021

Ecology and Evolution

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Shaw's Agave (Agave shawii ssp. shawii) is an endangered maritime succulent growing along the coast of California and northern Baja California. The population inhabiting Point Loma Peninsula has a complicated history of transplantation without documentation. The low effective population size in California prompted agave transplanting from the U.S. Naval Base site (NB) to Cabrillo National Monument (CNM). Since 2008, there are no agave sprouts identified on the CNM site, and concerns have been raised about the genetic diversity of this population. We sequenced two barcoding loci, rbcL and matK, of 27 individual plants from 5 geographically distinct populations, including 12 individuals from California (NB and CNM). Phylogenetic analysis revealed the three US and two Mexican agave populations are closely related and have similar genetic variation at the two barcoding regions, suggesting the Point Loma agave population is not clonal. Agave‐associated soil microbes used significantly more carbon sources in CNM soil samples than in NB soil likely due to higher pH and moisture content; meanwhile, soil type and soil chemistry analysis including phosphorus, nitrate nitrogen, organic matter, and metals revealed significant correlations between microbial diversity and base saturation (p < 0.05, r2 = 0.3676), lime buffer capacity (p < 0.01, r2 = 0.7055), equilibrium lime buffer capacity (p < 0.01, r2 = 0.7142), and zinc (p < 0.01, r2 = 0.7136). Soil microbiome analysis within the CNM population revealed overall expected richness (H′ = 5.647–6.982) for Agave species, while the diversity range (1 − D = 0.003392–0.014108) suggests relatively low diversity marked by high individual variation. The most prominent remaining US population of this rare species is not clonal and does not seem to be threatened by a lack of genetic and microbial diversity. These results prompt further efforts to investigate factors affecting Agave's reproduction and fitness.

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Effect of calco-magnesian amendment on the mineral weathering abilities of bacterial communities in acidic and silicate-rich soils

Cited by 21 publications

References 35 publications

Bioweathering of nontronite colloids in hybrid silica gel: implications for iron mobilization

Bioweathering of nontronite colloids in hybrid silica gel: implications for iron mobilization

Experimental Study on the Phlogopite Weathering Potential of Bacterial Communities Isolated from Different Soil Profiles

Relative genetic diversity of the rare and endangered Agave shawii ssp. shawii and associated soil microbes within a southern California ecological preserve

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