Long-term fertilization changes bacterial diversity and bacterial communities in the maize rhizosphere of Chinese Mollisols

Wang, Qingfeng; Jiang, Xin; Guan, Dawei; Wei, Dan; Zhao, Baisuo; Ma, Mingchao; Chen, Sanfeng; Li, Li; Cao, Fengming; Li, Jun

doi:10.1016/j.apsoil.2017.12.007

Cited by 107 publications

(69 citation statements)

References 77 publications

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“…Fertilization had a substantial impact on the composition of the rhizobacterial community of pakchoi (Figure 1c and Table S2). Although most studies indicate that the root exudates are the main driver in shaping the compositions of the bacterial community in the rhizosphere [10], recent studies show that the fertilizer regime could be a more important factor than plant exudation in alerting the rhizobacterial community structures of diverse field crops [11]. We further observed several fertilizer-associated microbial taxa in the rhizosphere of pakchoi.…”

Section: The Impact Of Fertilizers On Soil and Plant Properties And Rmentioning

confidence: 65%

“…Rhizobacteria are a group of bacteria that inhabit the soil surrounding roots with high microbial activities and their density is sustained by root exudates [10]. A recent study further demonstrates that long-term fertilization has a greater influence on rhizobacteria community compositions than plant root [11]. The significance of the interactions between rhizobacteria and roots in plant growth, nutrient uptake, disease, and insect resistance were observed by several authors [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Pakchoi Antioxidant Improvement and Differential Rhizobacterial Community Composition under Organic Fertilization

Liao

Liang

et al. 2019

Sustainability

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A high level of antioxidants in organic-produced vegetables has been attributed to soil conditions; however, little is known about the relationships between antioxidants and rhizobacteria under different fertilization treatments. A pot trial for pakchoi (Brassica campestris ssp. chinensis L.) was conducted under greenhouse conditions with: (1) control; (2) chemical fertilizer; and (3) organic fertilizer. The responses of the plant, soil properties, and rhizobacterial community were measured after 45 days of cultivation. Fertilization increased soil nutrient levels and pakchoi productivity and the reshaped rhizobacterial community structure, while no differences in rhizobacterial abundance and total diversity were observed. Generally, most plant antioxidants were negatively correlated with inorganic nitrogen (N) and positively correlated to organic N in soil. The genera of Arthrospira and Acutodesmus contained differential rhizobacteria under chemical fertilizer treatment, which are known as copiotrophs. In addition, the addition of a chemical fertilizer may stimulate organic substance turnover by the enrichment of organic compound degraders (e.g., Microbacterium and Chitinophaga) and the promotion of predicted functional pathways involved in energy metabolism. Several beneficial rhizobacteria were associated with organic fertilizer amended rhizosphere including the genera Bacillus, Mycobacterium, Actinomycetospora, and Frankia. Furthermore, Bacillus spp. were positively correlated with plant biomass and phenolic acid. Moreover, predictive functional profiles of the rhizobacterial community involved in amino acid metabolism and lipid metabolism were significantly increased under organic fertilization, which were positively correlated with plant antioxidant activity. Overall, our study suggests that the short-term application of chemical and organic fertilizers reshapes the rhizobacterial community structure, and such changes might contribute to the plant’s performance.

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Section: The Impact Of Fertilizers On Soil and Plant Properties And Rmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Pakchoi Antioxidant Improvement and Differential Rhizobacterial Community Composition under Organic Fertilization

Liao

Liang

et al. 2019

Sustainability

View full text Add to dashboard Cite

show abstract

“…Pearson's correlation and Mantel tests identified that the properties of soil showed various significant correlations with bacterial community composition at different taxonomic levels. Similarly, Wang et al (2018) observed that pH and AP were important predictors of bacterial community composition both in rhizosphere and bulk soil.…”

Section: Tablementioning

confidence: 84%

Variations in soil and plant-microbiome composition with different quality irrigation waters and biochar supplementation

Cui

Fan

et al. 2019

Applied Soil Ecology

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“…Previous studies have shown that application of N fertilizers (including NH 4 NO 3 , urea, and NO 3 − ) can inhibit soil bacterial diversity [37][38][39]. This may be because an increased inorganic N content reduces the competitiveness of microbes that are less tolerant to high osmotic potential and/or those that are able to x N 2 [40].…”

Section: Nitrogen Form and Maize Rhizosphere In Uenced Soil Bacterialmentioning

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 fertilization changes bacterial diversity and bacterial communities in the maize rhizosphere of Chinese Mollisols

Cited by 107 publications

References 77 publications

Pakchoi Antioxidant Improvement and Differential Rhizobacterial Community Composition under Organic Fertilization

Pakchoi Antioxidant Improvement and Differential Rhizobacterial Community Composition under Organic Fertilization

Variations in soil and plant-microbiome composition with different quality irrigation waters and biochar supplementation

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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