Microbial oxidation of organic and elemental selenium to selenite

Luo, Xiong‐Jian; Wang, Yiting; Lan, Yan; An, Lijin; Wang, Gejiao; Li, Mingshun; Zheng, Shixue

doi:10.1016/j.scitotenv.2022.155203

Cited by 21 publications

(18 citation statements)

References 27 publications

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“…Dyella spp. was involved in the Se biogeochemical cycle [50]. Bradyrhizobium was a kind of nitrogen-fixing bacteria related to nitrogen fixation [51].…”

Section: Effects Of Nitrogen Reduction With Bio-organic Fertilizer On...mentioning

confidence: 99%

Nitrogen Reduction with Bio-Organic Fertilizer Altered Soil Microorganisms, Improved Yield and Quality of Non-Heading Chinese Cabbage (Brassica campestris ssp. chinensis Makino)

Zhou

et al. 2022

Agronomy

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Excessively using fertilizers poses serious problems such as environmental pollution, soil degeneration, and quality and yield reduction of vegetables. This study aimed to illustrate the effect of different organic manure and inorganic fertilizers on the characteristics of soil, and the growth, yield, and quality of non-heading Chinese cabbage. There were 28 treatments in the first experiment: no fertilization (CK), conventional fertilization (100% nitrogen T1), 20% reduction of total nitrogen (T2), 30% reduction of total nitrogen (T3), and 20% or 30% reduction of total nitrogen with four kinds of fertilizers and three kinds of dosages (24 treatments). Six treatments, being selected from the first experiment based on growth of plants, were further applied to the second experiment. The results of the second experiment showed that the pH, nitrate nitrogen, and organic matter content of soil treated by N2 (20% reduction of total nitrogen with 1500 kg·ha−1 No.1: Bacillus-enriched bio-organic fertilizer) were significantly enhanced compared with T1 (100% nitrogen). The N2-treated plants showed an 11.66% increase in root activity, 9.24% enhancement in yield, 5.79% increase in vitamin C (VC), and 47.87% decrease in nitrate content compared with T1. Nitrogen reduction with bio-organic fertilizer significantly increased the dominant phyla of Gemmatimonadetes and Chytridiomycota and significantly decreased Ascomycota, and increased the dominant genera of Gemmatimonas and Bacillus and decreased Fusarium, indicating that this treatment altered the microbial community composition of soil. Redundancy analysis (RDA) showed that AP (available phosphorus), OM (organic matter), and UREA (urease activity) of the soil were significantly correlated with microbial community structure. Yield was significantly, positively correlated with Rhodanobacter and Olpidium. In conclusion, nitrogen reduction with bio-organic fertilizer benefited growth, yield, and quality of non-heading Chinese cabbage by improving the soil quality.

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“…Dyella spp. was involved in the Se biogeochemical cycle [50]. Bradyrhizobium was a kind of nitrogen-fixing bacteria related to nitrogen fixation [51].…”

Section: Effects Of Nitrogen Reduction With Bio-organic Fertilizer On...mentioning

confidence: 99%

Nitrogen Reduction with Bio-Organic Fertilizer Altered Soil Microorganisms, Improved Yield and Quality of Non-Heading Chinese Cabbage (Brassica campestris ssp. chinensis Makino)

Zhou

et al. 2022

Agronomy

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“…Finally, not many studies have reported the oxidation of Se 0 and organic Se by microorganisms present in soils. Very recently, Luo et al, 2022 discovered four bacterial strains ( Dyella sp. LX-1 and LX-66, and Rhodanobacter sp.…”

Section: Interaction Mechanisms Between Microorganisms and Relevant R...mentioning

confidence: 99%

Impact of microbial processes on the safety of deep geological repositories for radioactive waste

et al. 2023

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To date, the increasing production of radioactive waste due to the extensive use of nuclear power is becoming a global environmental concern for society. For this reason, many countries have been considering the use of deep geological repositories (DGRs) for the safe disposal of this waste in the near future. Several DGR designs have been chemically, physically, and geologically well characterized. However, less is known about the influence of microbial processes for the safety of these disposal systems. The existence of microorganisms in many materials selected for their use as barriers for DGRs, including clay, cementitious materials, or crystalline rocks (e.g., granites), has previously been reported. The role that microbial processes could play in the metal corrosion of canisters containing radioactive waste, the transformation of clay minerals, gas production, and the mobility of the radionuclides characteristic of such residues is well known. Among the radionuclides present in radioactive waste, selenium (Se), uranium (U), and curium (Cm) are of great interest. Se and Cm are common components of the spent nuclear fuel residues, mainly as 79Se isotope (half-life 3.27 × 105 years), 247Cm (half-life: 1.6 × 107 years) and 248Cm (half-life: 3.5 × 106 years) isotopes, respectively. This review presents an up-to-date overview about how microbes occurring in the surroundings of a DGR may influence their safety, with a particular focus on the radionuclide-microbial interactions. Consequently, this paper will provide an exhaustive understanding about the influence of microorganisms in the safety of planned radioactive waste repositories, which in turn might improve their implementation and efficiency.

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“…For both the control and optimization of Se oxidation, there is an increasing interest in understanding the underlying microbiological processes, including the biochemical fundamentals of the oxidation reactions. The Se-oxidizing bacteria have been reported to increase soil SeO 3 2− and SeO 4 2− contents although at low rates [ 49 , 53 , 54 ]. For instance, the heterotrophic bacterium Bacillus megaterium was discovered to oxidize elemental Se to selenite [ 49 ].…”

Section: Selenium Biochemical Cycle Driven By Microorganismsmentioning

confidence: 99%

“…LX-1 and LX-66, and Rhodanobacter spp. LX-99 and LX-100) isolated from seleniferous soil can oxidize Se(0) to Se(IV) and dramatically increase water-soluble Se and exchangeable Se fractions in soil [ 53 ]. More importantly, the authors firstly found the oxidation of organic Se (selenomethionine and selenocystine) to Se(IV) with a higher oxidation efficiency at pH 8.56 than at pH 5.25 [ 53 ].…”

Section: Selenium Biochemical Cycle Driven By Microorganismsmentioning

confidence: 99%

Selenium species transforming along soil–plant continuum and their beneficial roles for horticultural crops

Guo

Zeng

et al. 2022

Horticulture Research

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Selenium (Se) acquirement from daily diet can help reduce risk of many diseases. The edible parts of crop plants are the main source of dietary Se, while the Se content in crops is determined by Se bioavailability in soil. We summarize recent research on the biogeochemical cycle of Se driven by specific microorganisms and emphasize the oxidizing process in the Se cycle. Moreover, we discuss how plant root exudates and rhizosphere microorganisms affect soil Se availability. Finally, we cover beneficial microorganisms, including endophytes, that promote crop quality and improve crop tolerance to environmental stresses. Se availability to plants depends on the balance between adsorption and desorption, reduction, methylation and oxidation, which are determined by interactions among soil properties, microbial communities and plants. Reduction and methylation processes governed by bacteria or fungi lead to declined Se availability, while Se oxidation regulated by Se-oxidizing microorganisms increases Se availability to plants. Despite a much lower rate of Se oxidization compared to reduction and methylation, the potential roles of microbial communities in increasing Se bioavailability are probably largely underestimated. Enhancing Se oxidation and Se desorption are crucial for the promotion of Se bioavailability and uptake, particularly in Se-deficient soils. Beneficial roles of Se are reported in terms of improved crop growth and quality, and enhanced protection against fungal diseases and abiotic stress through improved photosynthetic traits, increased sugar and amino acid contents, and promoted defense systems. Understanding Se transformation along the plant-soil continuum is crucial for agricultural production and even for human health.

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Microbial oxidation of organic and elemental selenium to selenite

Cited by 21 publications

References 27 publications

Nitrogen Reduction with Bio-Organic Fertilizer Altered Soil Microorganisms, Improved Yield and Quality of Non-Heading Chinese Cabbage (Brassica campestris ssp. chinensis Makino)

Nitrogen Reduction with Bio-Organic Fertilizer Altered Soil Microorganisms, Improved Yield and Quality of Non-Heading Chinese Cabbage (Brassica campestris ssp. chinensis Makino)

Impact of microbial processes on the safety of deep geological repositories for radioactive waste

Selenium species transforming along soil–plant continuum and their beneficial roles for horticultural crops

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