Organic nitrogen cycling microbial communities are abundant in a dry Australian agricultural soil

Phillips, Lori A.; Schefe, Cassandra; Fridman, Masha; O'Halloran, N.; Armstrong, Roger; Mele, Pauline M.

doi:10.1016/j.soilbio.2015.04.004

Cited by 40 publications

(21 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Management of these losses is challenging, as they occur in response to episodic rainfall events, rather than agricultural management practices. After summer rainfall in semi-arid environments, microorganisms rapidly become active, resulting in a flush of soil organic matter (OM) mineralisation that increases inorganic N availability (Murphy et al, 1998;Austin et al, 2004;Phillips et al, 2015). Production of inorganic N is particularly detrimental in fallow soil, as plant uptake is minimal and nitrate (NO 3 À ) is at risk of loss by leaching during subsequent rainfall and drainage events (Anderson et al, 1998;Arregui and Quemada, 2006).…”

Section: Introductionmentioning

confidence: 99%

Nitrapyrin decreased nitrification of nitrogen released from soil organic matter but not amoA gene abundance at high soil temperature

Fisk

Maccarone

Barton

et al. 2015

Soil Biology and Biochemistry

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Nitrapyrin decreased nitrification of nitrogen released from soil organic matter but not amoA gene abundance at high soil temperature

Fisk

Maccarone

Barton

et al. 2015

Soil Biology and Biochemistry

View full text Add to dashboard Cite

“…Nitrogen cycling and carbon metabolism are important in environmental nutrient cycling (Dijkstra et al, ; Phillips et al, ). The results from the metabolic pathways analysis showed that the concentration of DMP was positively correlated with the increase in gene abundances of communities involved in nitrogen cycling, the glycolysis pathway, the TCA cycle, the pentose phosphate pathway and the degradation pathway of DMP.…”

Section: Discussionmentioning

confidence: 99%

“…The results collectively indicated the major differences among CK and DMP treated soil in relation to the capacity for biogeochemical cycling and the abundances of genes involved in nutrient consumption by microorganisms in the Mollisol. Nitrogen cycling and carbon metabolism are important in environmental nutrient cycling (Dijkstra et al, 2011;Phillips et al, 2015). The results from the metabolic pathways analysis showed that the concentration of DMP was positively correlated with the increase in gene abundances of communities involved in nitrogen cycling, the glycolysis pathway, the TCA cycle, the pentose phosphate pathway and the degradation pathway of DMP.…”

Section: Discussionmentioning

confidence: 99%

Dimethyl phthalate altered the microbial metabolic pathways in a Mollisol

Wang

You

et al. 2018

European J Soil Science

View full text Add to dashboard Cite

Summary Dimethyl phthalate (DMP), a member of the phthalate esters (PAEs), is a common contaminant and frequently detected in soil. In this study, metagenomics revealed that DMP contamination in a Mollisol led to alterations in biological genomes and pathways identified using the Kyoto Encyclopedia of Genes and Genomes (KEGG) databases. The results of functional annotation with pathway information demonstrated that genes involved in metabolism and signal regulatory pathways were changed in soil contaminated with DMP. Genes involved in nitrogen metabolism, carbon metabolism (glycolysis, the citrate cycle and pentose phosphate pathway) and signal regulatory pathways (apoptosis pathway, adipocytokine signalling pathway and glutamatergic synapse signal pathways) were more abundant under DMP contamination in the Mollisol. Quantitative PCR (QPCR) assays also showed that copies of genes associated with DMP degradation, pcmA, pehA, phtAb, phtB and phtC, correlated positively with the concentration of DMP. The results also suggested that the acceleration of nitrogen and carbon metabolism in the Mollisol by DMP contamination arose from altering the signal regulatory pathways. This is one of the most damaging mechanisms for microorganisms; therefore, DMP contamination will adversely affect the ecosystem in the Mollisol. Highlights How can DMP contamination alter the metabolic pathways of microorganisms in a Mollisol? Changes in microbial metabolism under DMP contamination were estimated by metagenomics. DMP accelerated N and C metabolism by altering the signal pathways. DMP could disrupt the ecological balance by altering metabolism in a Mollisol.

show abstract

“…Microbiome responses to drought have been widely reported in many different soils (Lau and Lennon, 2012;Bouskill et al, 2013;Evans et al, 2014;Barnard et al, 2015;Phillips et al, 2015). Fewer studies have been done to determine the effects of drought on endosphere, rhizosphere and the soil immediately around the roots (Nuccio et al, 2016;Santos-Medellin et al, 2017;Xu et al, 2018), which was the focus of this work.…”

Section: Changes In the Microbiome Due To Droughtmentioning

confidence: 99%

Belowground microbial communities respond to water deficit and are shaped by decades of maize hybrid breeding

Wang

Marsh

Kruger

et al. 2019

Environmental Microbiology

View full text Add to dashboard Cite

Summary Root‐associated microbial communities are important for maintaining agricultural productivity. However, belowground microbial community response to drought in temperate maize agroecosystems, as well as how these responses to water‐stress are shaped by host genotype are poorly understood. Ten maize hybrids (six newer and four older) were grown in a replicated field trial. The endosphere, rhizosphere and soil bacterial and archaeal communities were sampled and analyzed using 16S rRNA gene amplicon sequencing. Sampling was done at two developmental stages in a water‐limited environment with and without supplemental irrigation. Significant shifts in microbial community composition (β‐diversity) were measured between two sampling times during the season, in well‐watered and water‐stressed conditions and in newer and older generation maize hybrids. The microbial community diversity within samples (α‐diversity) was not affected by drought stress or host factors. The phyla Actinobacteria and Firmicutes were more abundant in the rhizosphere of newer hybrids under water stress. These results highlight the importance of temporal variation, environmental stress and plant genetics as influenced by breeding history in shaping the composition of root associated microbial communities. These insights may provide new approaches to the improvement of crop stress tolerance through optimizing microbial communities.

show abstract

Organic nitrogen cycling microbial communities are abundant in a dry Australian agricultural soil

Cited by 40 publications

References 70 publications

Nitrapyrin decreased nitrification of nitrogen released from soil organic matter but not amoA gene abundance at high soil temperature

Nitrapyrin decreased nitrification of nitrogen released from soil organic matter but not amoA gene abundance at high soil temperature

Dimethyl phthalate altered the microbial metabolic pathways in a Mollisol

Belowground microbial communities respond to water deficit and are shaped by decades of maize hybrid breeding

Contact Info

Product

Resources

About