Long-term nitrogen application decreases the abundance and copy number of predatory myxobacteria and alters the myxobacterial community structure in the soil

Wang, Wenhui; Wang, Ning; Dang, Keke; Dai, Wei; Guan, Ling; Wang, Boren; Gao, Jieying; Cui, Zhongli; Dong, Yuanhua; Wang, Hui

doi:10.1016/j.scitotenv.2019.135114

Cited by 32 publications

(23 citation statements)

References 54 publications

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“…These observed reductions of AOB by fertilization in the black and red soils could be explained by a limitation of substrate for AOB as ionization of ammonia to ammonium promoted by soil acidification at lower pH (< 5.5) (Gubry-Rangin et al, 2010;Lehtovirta-Morley et al, 2011;Zhang et al, 2012). The reductions of predatory/exoparasitic bacteria by fertilization were also consistent with a previous study, which illustrated that pH determined predatory bacteria (myxobacteria) abundance and cell density after long-term nitrogen fertilization (Wang et al, 2019b). Interestingly, we found that potential biotic interactions might explain fertilization-induced changes in functional groups in the acidic soils.…”

Section: Discussionsupporting

confidence: 89%

“…For example, changes in AOB were tightly linked to changes of predatory/exoparasitic bacteria. Both groups likely respond to similar changes in their surrounding habitat as shown before (Yao et al, 2011;Wang et al, 2019b). Predatory bacteria prey on a diverse range of bacteria (Morgan et al, 2010;Petters et al, 2018) and therefore reduce Significance levels are denoted with *P < 0.05, **P < 0.01, ***P < 0.001.…”

Section: Discussionmentioning

confidence: 96%

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Fertilization changes soil microbiome functioning, especially phagotrophic protists

Zhao

Quan

et al. 2020

Soil Biology and Biochemistry

102

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This article is made publicly available in the institutional repository of Wageningen University and Research, under the terms of article 25fa of the Dutch Copyright Act, also known as the Amendment Taverne. This has been done with explicit consent by the author.Article 25fa states that the author of a short scientific work funded either wholly or partially by Dutch public funds is entitled to make that work publicly available for no consideration following a reasonable period of time after the work was first published, provided that clear reference is made to the source of the first publication of the work.This publication is distributed under The Association of Universities in the Netherlands (VSNU) 'Article 25fa implementation' project. In this project research outputs of researchers employed by Dutch Universities that comply with the legal requirements of Article 25fa of the Dutch Copyright Act are distributed online and free of cost or other barriers in institutional repositories. Research outputs are distributed six months after their first online publication in the original published version and with proper attribution to the source of the original publication.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 96%

Fertilization changes soil microbiome functioning, especially phagotrophic protists

Zhao

Quan

et al. 2020

Soil Biology and Biochemistry

102

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“…Although protists (17), rotifers (18), nematodes (19), and phages (11,20,21) are thought to function as the dominant predators in microbiomes, predatory bacteria are common in both soil (8,22) and aquatic (23) systems. But beyond their common occurrence in these habitats, we know little of their activity in the wild, how rapidly they grow, their functional significance in food webs, and how they respond to enrichment at the base of the food web through substrate additions.…”

mentioning

confidence: 99%

The Functional Significance of Bacterial Predators

Hungate

Marks

Power

et al. 2021

mBio

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“…For example, in the present study, OTUs from the Myxococcales were negatively correlated with soil residual N derived from NH 4 + fertilizer in the maize rhizosphere. Myxococcales are known to be inhibited by chemical N fertilizer due to soil acidi cation [58]. The OTUs from the Streptomycetales were negatively correlated with soil residual N derived from NO 3 − fertilizer.…”

Section: Soil Residual Fertilizer N-correlated Otus In Bacterial Netwmentioning

confidence: 99%

Ammonium and Nitrate Shift the Spatial Distribution of Soil Bacterial Communities and Association Networks Along a Distance from Maize Roots in an Acidic Red Soil

Zhang

Zhao

Shi

et al. 2020

Preprint

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Background: Ammonium (NH4+) and nitrate (NO3−) are two major inorganic nitrogen (N) forms available for plant growth. Soil microbes affect the availability and transformation of these N forms in the rhizosphere, and this affects the N-use efficiency of plants. However, little is known about the responses of the rhizosphere bacterial community structure to NH4+ and NO3−. Here, a rhizobox containing a root zone (root growing area) and various soil compartments (0–0.5 cm, 0.5–1 cm, 1–2 cm, 2–4 cm, and 4–9 cm from the root zone) was designed to investigate the spatial distribution of bacterial diversity, community structure, and co-occurrence patterns along a distance from maize (Zea mays L.) roots with the addition of 15N-labeled NH4+ or NO3− in an acidic red soil.Results: Addition of NH4+ and NO3− reduced soil bacterial diversity in the maize root zone. The structures of soil bacterial communities differed between NH4+ and NO3− in the root zone and 0.5 cm away from the root zone. Soil pH was the major driver of bacterial community assembly during plant uptake of N. Maize roots recruited potentially beneficial acidophilic bacteria (e.g. Acidibacter, Burkholderia, and Catenulispora) under NH4+ treatment, and recruited growth-promoting bacteria that prefer higher pH (e.g. Sphingomonas, Sphingobium, Azospirillum, and Novosphingobium) under NO3− treatment. In the N-fertilization treatments, the soil bacterial networks were more complex in the root zone and its adjacent 0.5–1 cm zone than in other soil compartments. The soil bacterial networks were more complex under NH4+ treatment than under NO3−. More bacterial taxa in the networks responded positively and negatively to soil residual NH4+ than to NO3− in all zones in the rhizobox.Conclusions: The combined effects of the N form and the rhizosphere influenced the spatial patterns and co-occurrence network of soil bacterial communities at different distances from the maize root zone, mainly because of changes in soil pH during the uptake of NH4+ and NO3− by maize roots. Regulating microbial communities by adjusting soil pH through NH4+ and NO3− supply may be an environmentally friendly option for promoting soil microbial functions in intensively managed agro-ecosystems.

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Long-term nitrogen application decreases the abundance and copy number of predatory myxobacteria and alters the myxobacterial community structure in the soil

Cited by 32 publications

References 54 publications

Fertilization changes soil microbiome functioning, especially phagotrophic protists

Fertilization changes soil microbiome functioning, especially phagotrophic protists

The Functional Significance of Bacterial Predators

Ammonium and Nitrate Shift the Spatial Distribution of Soil Bacterial Communities and Association Networks Along a Distance from Maize Roots in an Acidic Red Soil

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