Incidence and diversity of phosphate-solubilising bacteria are linked to phosphorus status in grassland soils

Mander, Carolyn; Wakelin, Steven A.; Young, Sandra; Condron, Leo M.; O’Callaghan, Maureen

doi:10.1016/j.soilbio.2011.09.009

Cited by 167 publications

(93 citation statements)

References 52 publications

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“…While sites differed in geographical location, soil type, environmental factors, extent of cultivation and botanical composition, the addition of exogenous nutrients caused the strongest shifts in community assemblage and functional composition (Wakelin et al 2012a). This is supported by other recent investigations demonstrating that application of P fertilizer alters the abundance of bacteria involved in the biogeochemical cycling of P in soil (Mander et al 2012) and also alters the composition of various taxa in particular Actinobacteria and arbuscular mycorrhizal fungi (Wakelin et al 2012b). In addition, the structure and functions in soil ecosystems are closely linked to pH; several studies have identified soil pH as a 'first-order' factor driving community composition (e.g.…”

supporting

confidence: 56%

Physicochemical properties of 50 New Zealand pasture soils: a starting point for assessing and managing soil microbial resources

Wakelin

Koten

O’Callaghan

et al. 2013

New Zealand Journal of Agricultural Research

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New Zealand's pastoral agriculture faces challenges associated with increasing on-farm productivity, while minimizing the environmental footprint of farming. Soil microorganisms mediate a wide range of processes that affect plant production and also have environmental consequences. However, there has been little attempt to manage these in a farming system context. This is primarily because of difficulties in determining what microbiological resources are present in soils, how they link with soil processes and function, and how variation in soil types, climate or farm management practices influence microbial function. We sampled 50 pasture soils from across 11 of New Zealand's major soil groups, 10 geographical zones and under different grazing systems (high input dairy units to dry-stock grazing). The environmental and physicochemical properties of the soils were characterized and DNA extracted. The concentrations of elements primarily associated with fertilizer use (phosphorus, nitrogen and sulphur) were all significantly (P B 0.05) higher in dairy-based systems, yet soil carbon was unchanged. The concentration of many properties varied between the soil types, reflecting a combination of their pedogenesis and predominant land use. The amount of DNA in soils was closely related to anaerobically mineralizable nitrogen (P B 0.001), a measure of soil organic matter content, but did not vary with grazing system intensity. The extensive data set for each soil, coupled with DNA originating from the same samples, provides a unique opportunity for a number of ancillary studies to map biological resources in pastures and assess how these are regulated by edaphic and environmental properties.

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supporting

confidence: 56%

Physicochemical properties of 50 New Zealand pasture soils: a starting point for assessing and managing soil microbial resources

Wakelin

Koten

O’Callaghan

et al. 2013

New Zealand Journal of Agricultural Research

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“…Microbial processes (enzymes) that respond as a function of total microbial community size (or activity), such as FDA, will be primarily affected by factors such as total amount of organic material addition. However, microbial communities associated with processes such as P-mineralization are under resource-specific selection (Mander et al, 2012). As such, these have a more subtle association to the particular type (chemical composition) of material addition.…”

Section: Functional Profiles: Soil Enzyme Activitiesmentioning

confidence: 99%

Supplementing chemical fertilizer with an organic component increases soil biological function and quality

Tao

Liang

Wakelin

et al. 2015

Applied Soil Ecology

113

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“…The differences in APase-harboring bacterial communities could also be driven by the P availability of the studied rhizosphere soils (Table 2). In this context, Chhabra et al (2013) and Mander et al (2012) observed that available P content of rhizosphere soils of barley and grasslands significantly affected the frequency and diversity of APase bacterial assemblages. Probably, composition of total and APase bacterial communities of rhizosphere soils also depends on the plant species and soil properties as reported by Massaccesi et al (2015) and Wang et al (2012).…”

Section: Discussionmentioning

confidence: 98%

Bacterial alkaline phosphomonoesterase in the rhizospheres of plants grown in Chilean extreme environments

et al. 2016

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Bacterial alkaline phosphomonoesterases (APases) are relevant for organic phosphorus (Po) recycling in many soils. However, the abundance and diversity of bacterial APase in the rhizospheres of native plants are poorly known, particularly in extreme environments. In this research work, we studied the composition of total and APase-harboring bacterial communities, abundances of selected APase genes (phoD and phoX), and APase activities in rhizosphere soils from native plants grown in extreme environments of northern (Atacama Desert), central (Andes volcano; Quetrupillan and Mamuil Malal) and hot spring (Liquiñe), and southern polar (Patagonia and Antarctic) regions of Chile. Differences in the composition of bacterial communities in the rhizosphere soils were revealed by denaturing gradient gel electrophoresis (DGGE) and quantitative PCR (qPCR) of 16S ribosomal RNA (rRNA), phoD, and phoX genes. In general, the significant lowest bacterial diversities, APase gene abundances, and APase activities were observed in rhizosphere soils from Atacama Desert, whereas the highest values were observed in rhizosphere soils of Patagonia. In addition, APase gene abundances were positively correlated among them and with APase activity of rhizosphere soils, but negatively correlated with phosphorus (P) availability in rhizosphere soils. Although bacterial APases were observed in all studied rhizosphere soils, their relevance to soil Po recycling in soils of extreme environments remains unclear and further studies are needed.

show abstract

Incidence and diversity of phosphate-solubilising bacteria are linked to phosphorus status in grassland soils

Cited by 167 publications

References 52 publications

Physicochemical properties of 50 New Zealand pasture soils: a starting point for assessing and managing soil microbial resources

Physicochemical properties of 50 New Zealand pasture soils: a starting point for assessing and managing soil microbial resources

Supplementing chemical fertilizer with an organic component increases soil biological function and quality

Bacterial alkaline phosphomonoesterase in the rhizospheres of plants grown in Chilean extreme environments

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