Complexity of bacterial communities within the rhizospheres of legumes drives phenanthrene degradation

Jiao, Shuo; Li, Qiaoping; Zai, Xiaoyu; Gao, Xuee; Chen, Weimin

doi:10.1016/j.geoderma.2019.06.019

Cited by 22 publications

(6 citation statements)

References 64 publications

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“…More importantly, the positive effect of bacterial diversity was maintained and reduced (from r = 0.96 to 0.96, 0.89) after removing the effect of fungal network complexity and bacterial composition (Figure 5). This shows that our data support the traditional view and our fourth hypothesis; nevertheless, the network complexity also plays an important role to link the soil microbiome and multifunctionality, which also supports that the simplification of soil complex network links could debilitate ecosystem function (Jiao et al, 2019;Wagg et al, 2019). Interestingly, network complexity was enhanced while multifunctionality was impaired by grazing.…”

Section: Multifunctionality Is Linked To Soil Microbiomesupporting

confidence: 88%

Grazing lowers soil multifunctionality but boosts soil microbial network complexity and stability in a subtropical grassland of China

Ding

Tian

et al. 2023

Front. Microbiol.

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IntroductionLong-term grazing profoundly affects grassland ecosystems, whereas how the soil microbiome and multiple soil ecosystem functions alter in response to two-decades of grazing, especially how soil microbiome (diversity, composition, network complexity, and stability) forms soil multifunctionality is rarely addressed.MethodsWe used a long-term buffalo grazing grassland to measure the responses of soil physicochemical attributes, stoichiometry, enzyme activities, soil microbial niche width, structure, functions, and networks to grazing in a subtropical grassland of Guizhou Plateau, China.ResultsThe evidence from this work suggested that grazing elevated the soil hardness, available calcium content, and available magnesium content by 6.5, 1.9, and 1.9 times (p = 0.00015–0.0160) and acid phosphatase activity, bulk density, pH by 59, 8, and 0.5 unit (p = 0.0014–0.0370), but decreased the soil water content, available phosphorus content, and multifunctionality by 47, 73, and 9–21% (p = 0.0250–0.0460), respectively. Grazing intensified the soil microbial carbon limitation (+78%, p = 0.0260) as indicated by the increased investment in the soil β-glucosidase activity (+90%, p = 0.0120). Grazing enhanced the complexity and stability of the bacterial and fungal networks but reduced the bacterial Simpson diversity (p < 0.05). The bacterial diversity, network complexity, and stability had positive effects, while bacterial and fungal compositions had negative effects on multifunctionality.DiscussionsThis work is an original attempt to show that grazing lowered multifunctionality via the reduced bacterial diversity and shifted soil bacterial and fungal compositions rather than the enhanced bacterial and fungal network complexities and stability by grazing. Protecting the bacterial diversity from decreasing, optimizing the composition of bacteria and fungi, and enhancing the complexity and stability of bacterial network may be conducive to improving the soil multifunction of grazing grassland, on a subtropical grassland.

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Section: Multifunctionality Is Linked To Soil Microbiomesupporting

confidence: 88%

Grazing lowers soil multifunctionality but boosts soil microbial network complexity and stability in a subtropical grassland of China

Ding

Tian

et al. 2023

Front. Microbiol.

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“…Combined degradations (the three PAHs together) were 91-96% for phenanthrene, 89-93% for anthracene, and 83-89% for pyrene (Table I). As seen in figure 6 The results of this study corroborate previous research on fungi mineralization of organic compounds and their ability to degrade chemical compounds of high molecular weight, such as lignin (Jiao et al 2019). Therefore, our data and earlier mentioned reports are significant in bioremediation, as they stand out when compared to bacteria (Samson 2004), whose metabolism is limited to a certain number of rings in PAHs, molecular weight, or conformation.…”

Section: Hydrocarbon Degradationsupporting

confidence: 90%

Biodegradation of polycyclic aromatic hydrocarbons by Acremonium sp. activity

Martinez

Muñoz-Castellanos²,

Bugarín³

et al. 2022

Rev. Int. Contam. Ambie.

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Chihuahua State is the largest apple producer in Mexico. To prevent apples from freezing during the winter, petroleum-based fuels are used to heat the orchards. In this research work, a microorganism isolated from inside of a fuel plastic container was identified through morphological analysis as the fungus Acremonium sp. By cultivating the fungus in potato dextrose agar medium (PDA), we were able to study the biodegradation rates of three polycyclic aromatic hydrocarbons (PAHs). The isolated microorganism was incubated at 28 ºC in M9 mineral liquid medium using phenanthrene, anthracene, and pyrene as the only carbon source at a concentration of 50 µg/mL. Degradation of PAHs was monitored using an environmentally friendly reverse phase ultra-high-performance liquid chromatography (UHPLC) system, with a C18 column, 30% water acidified at 0.1% with trifluoroacetic acid, and 70% acetonitrile as the mobile phase, 40 ºC column temperature, and UV detection at 254 nm. After 30 days of biodegradation (optimal time), the final mean concentration for individual degradation experiments were 2.51 µg/mL phenanthrene, 3.02 µg/mL anthracene and 5.53 µg/mL pyrene. Those final concentrations indicate degradation percentile of 95%, 94%, and 89%, respectively. Biodegradation experiments combining all three PAHs showed similarly high degradation percentiles of 93%, 94%, and 85% for phenanthrene, anthracene, and pyrene, respectively. The dry weight average at day 30 in the individual and combined degradation experiments was 2.34 mg/mg PAHs degraded.

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“…However, based on co-occurrence network analysis, no microbes were associated directly with PBAT degradation among the keystone taxa of the other three soil types. It is possible that keystone taxa related to PBAT degradation regulate the microbial community function through close cooperation and mutual adaptation mechanisms with other species, 62 and this may lead the microbial communities in LS to be more efficient in PBAT degradation.…”

Section: Resultsmentioning

confidence: 99%

Soil Type Driven Change in Microbial Community Affects Poly(butylene adipate-co-terephthalate) Degradation Potential

Han

Teng

Wang

et al. 2021

Environ. Sci. Technol.

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Biodegradable mulch films have been developed as a suitable alternative to conventional nondegradable polyethylene films. However, the key factors controlling the degradation speed of biodegradable mulch films in soils remain unclear. Here, we linked changes in the soil microbiome with the degradation rate of a promising biodegradable material poly(butylene adipate-co-terephthalate) (PBAT) in four soil types, a lou soil (LS), a fluvo-aquic soil (CS), a black soil (BS), and a red soil (RS), equivalent to Inceptisols (the first two soils), Mollisols, and Ultisols, using soil microcosms. The PBAT degradation rate differed with the soil type, with PBAT mineralization levels of 16, 9, 0.3, and 0.9% in LS, CS, BS, and RS, respectively, after 120 days. Metagenomic analysis showed that the microbial community in LS was more responsive to PBAT than the other three soils. PBAT hydrolase genes were significantly enriched in LS but were not significantly stimulated by PBAT in CS, BS, or RS. Several members of Proteobacteria were identified as novel potential degraders, and their enrichment extent was significantly positively correlated with PBAT degradation capacity. Overall, our results suggest that soil environments harbored a range of PBATdegrading bacteria and the enrichment of potential degraders drives the fate of PBAT in the soils.

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Complexity of bacterial communities within the rhizospheres of legumes drives phenanthrene degradation

Cited by 22 publications

References 64 publications

Grazing lowers soil multifunctionality but boosts soil microbial network complexity and stability in a subtropical grassland of China

Grazing lowers soil multifunctionality but boosts soil microbial network complexity and stability in a subtropical grassland of China

Biodegradation of polycyclic aromatic hydrocarbons by Acremonium sp. activity

Soil Type Driven Change in Microbial Community Affects Poly(butylene adipate-co-terephthalate) Degradation Potential

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