Phytoremediation potential of Miscanthus sinensis for mercury-polluted sites and its impacts on soil microbial community

Zhao, Anqi; Gao, Lingyun; Chen, Buqing; Liu, Feng

doi:10.1007/s11356-019-06563-3

Cited by 46 publications

(15 citation statements)

References 67 publications

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“…To date, no studies were found to have been conducted to illustrate the changes in the soil microbiome after the long‐term (more than 10 years) conversion of cropland to Miscanthus . A pot experiment showed that the cultivation of Miscanthus sinensis obviously improved the diversity of the bacterial community in mercury polluted soil compared with that of bare soil (Zhao et al, 2019). By contrast, results from a 5‐year field experiment indicated that cultivation of Miscanthus obviously decreased the diversity of the bacterial community when compared with bare land (Duan et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Cropland‐to‐Miscanthus conversion alters soil bacterial and archaeal communities influencing N‐cycle in Northern China

Zhao

Yue

et al. 2021

GCB Bioenergy

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Miscanthus spp. are increasingly cultivated in cropland worldwide due to their bioenergy potential and multiple ecological services. Effects of long‐term cropland‐to‐Miscanthus conversion without N fertilizer on soil microbiome and N cycling largely remain unknown. We aimed to explore the effects of Miscanthus conversion on soil microbiome and N cycling over a 15‐year period. We analyzed diversity, composition, and abundance of bacterial and archaeal communities using 16S rRNA amplicon sequencing, and abundances of N‐cycling‐related genes using quantitative polymerase chain reaction of 0–10 cm soils collected from bare land, cropland, 10‐year Miscanthus × giganteus, and 15‐year Miscanthus sacchriflorus land in Beijing. Conversion decreased soil sand and micro‐aggregate proportion, nitrate N (NiN), available phosphorus levels, conductivity, temperature, and pH, while increasing proportion of soil clay and macro‐aggregate (MAA), soil organic C (SOC), available N (AN), exchangeable Mg2+ (EMg2+), and available potassium (AK) contents as well as microbial C/N. Consequently, diversity, composition, and abundance of soil bacterial community exhibited larger changes than those values of archaeal community after conversion. Soil AP, EMg2+, AK, and SOC were key factors in shifting microbiome from the cropland to Miscanthus pattern. Moreover, abundances of bacterial and archaeal communities and the N fixer gene nifH increased, whereas that of the bacterial ammonia monooxygenase gene decreased. The copies of other N‐cycling‐related genes in the two Miscanthus lands seemed similar to those values of cropland. The nifH copies negatively correlated with soil NiN and positively correlated with AN, EMg2+, ECa2+, SOC, AK, and MAA. We conclude that changes in soil microbiome pattern induced by the variation of soil properties enhance microbial N fixation potential, maintaining stable N levels and robust N cycling with lower N leakage risk after conversion. These results should inspire farmers and governments to large‐scale use Miscanthus on marginal cropland in Northern China.

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Section: Discussionmentioning

confidence: 99%

Cropland‐to‐Miscanthus conversion alters soil bacterial and archaeal communities influencing N‐cycle in Northern China

Zhao

Yue

et al. 2021

GCB Bioenergy

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“…Firmin et al (2015) found that inoculating Funneliformis mosseae can improve the antioxidant capability of M × g, reduce the deleterious oxidation damage induced by heavy metal stress, and promote the growth of M × g plants in heavy metal polluted soil. Moreover, Miscanthus planting in mercury-contaminated soil can also enrich the diversity and abundance of microbes in soil (Zhao et al, 2019).…”

Section: Production Of Cellulosic Ethanol and Other By-productsmentioning

confidence: 99%

Miscanthus: A fast‐growing crop for environmental remediation and biofuel production

Wang

Kong

et al. 2020

GCB Bioenergy

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“…M. sinensis is a pioneering plant that can thrive in metal-contaminated sites and holds the potential for phytoremediation applications [ 34 , 46 ]. It is suggested that the endosphere microbiome of M. sinensis can provide critical environmental services, such as metal resistance and plant growth promotion, to support the survival of the host plant in mine tailings [ 20 , 47 ].…”

Section: Discussionmentioning

confidence: 99%

“…Miscanthus sinensis (Chinese silver grass) is a pioneer perennial grass plant native to eastern Asia and extensively encountered in mine tailings [ 33 ]. Miscanthus is known for its high metal accumulation potential and biomass production, making it well suited for phytoremediation of mine tailings [ 34 ]. Moreover, M. sinensis root-associated microbiome may contribute to metal resistance, nutrient acquisition, and promote plant growth [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization of diazotrophic root endophytes in Chinese silvergrass (Miscanthus sinensis)

Yang

Häggblom

et al. 2022

Microbiome

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Background Phytoremediation is a potentially cost-effective way to remediate highly contaminated mine tailing sites. However, nutrient limitations, especially the deficiency of nitrogen (N), can hinder the growth of plants and impair the phytoremediation of mine tailings. Nevertheless, pioneer plants can successfully colonize mine tailings and exhibit potential for tailing phytoremediation. Diazotrophs, especially diazotrophic endophytes, can promote the growth of their host plants. This was tested in a mine-tailing habitat by a combination of field sampling, DNA-stable isotope probing (SIP) analysis, and pot experiments. Results Bacteria belonging to the genera Herbaspirillum, Rhizobium, Devosia, Pseudomonas, Microbacterium, and Delftia are crucial endophytes for Chinese silvergrass (Miscanthus sinensis) grown in the tailing, the model pioneer plant selected in this study. Further, DNA-SIP using 15N2 identified Pseudomonas, Rhizobium, and Exiguobacterium as putative diazotrophic endophytes of M. sinensis. Metagenomic-binning suggested that these bacteria contained essential genes for nitrogen fixation and plant growth promotion. Finally, two diazotrophic endophytes Rhizobium sp. G-14 and Pseudomonas sp. Y-5 were isolated from M. sinensis. Inoculation of another pioneer plant in mine tailings, Bidens pilosa, with diazotrophic endophytes resulted in successful plant colonization, significantly increased nitrogen fixation activity, and promotion of plant growth. Conclusions This study indicated that diazotrophic endophytes have the potential to promote the growth of pioneer plant B. pilosa in mine tailings.

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Phytoremediation potential of Miscanthus sinensis for mercury-polluted sites and its impacts on soil microbial community

Cited by 46 publications

References 67 publications

Cropland‐to‐Miscanthus conversion alters soil bacterial and archaeal communities influencing N‐cycle in Northern China

Cropland‐to‐Miscanthus conversion alters soil bacterial and archaeal communities influencing N‐cycle in Northern China

Miscanthus: A fast‐growing crop for environmental remediation and biofuel production

Characterization of diazotrophic root endophytes in Chinese silvergrass (Miscanthus sinensis)

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