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Lookup NU author(s): Dr Joana Baptista, Emeritus Professor Neil GrayORCiD, Professor Ian Singleton, Dr Clare McCannORCiD, Professor David ManningORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
The objective of this work was to identify microbial communities associated with the surfaces of alkali feldspars and to determine whether these microbes might be involved in the weathering of these rocks for agronomic benefit. Samples were taken from weathering profiles and soils developed on a syenite, considered as a raw material for agromineral production, located in the municipality of Triunfo, in the state of Pernambuco, Brazil. Molecular microbiological techniques (qPCR and 16S rRNA gene sequencing) were used, and data were interpreted by the analysis of variance, hierarchical cluster analysis, and principal coordinates analysis. In addition, scanning electron microscopy was used to image mineral surfaces. Similar bacterial communities were observed in all samples, showing that the bacteria found in soil are present at the earliest stages of rock weathering and are available to play a role in nutrient release. In particular, Actinobacteria and, within this phylum, Actinomycetales were proportionally more abundant than other taxa in rock-dominated soil samples, i.e., in thin soils on or between fractured or broken syenite. The analysis of rock dust used as a remineralizer, crushed with no further treatment, shows that Actinobacteria play a role in the early stages of weathering of feldspar-bearing rocks.
Author(s): Baptista JdeC, Gray ND, Tarumoto MB, Singleton I, McCann CM, Manning DAC
Publication type: Article
Publication status: Published
Journal: Pesquisa Agropecuária Brasileira (Brazilian Journal of Agricultural Research)
Year: 2022
Volume: 57
Online publication date: 28/03/2022
Acceptance date: 04/02/2021
Date deposited: 31/03/2022
ISSN (print): 0100-204X
ISSN (electronic): 1678-3921
Publisher: EMBRAPA
URL: https://doi.org/10.1590/S1678-3921.pab2022.v57.01414
DOI: 10.1590/S1678-3921.pab2022.v57.01414
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