Effects of soil moisture on aging of exogenous selenate in three different soils and mechanisms

Zhai, Hua‐Jin; Kleawsampanjai, Pornpimol; Wang, Min; Qi, Mingxing; Yang, Lei; Liu, Nana; Zhou, Fei; Wang, Mengke; Liang, Dongli

doi:10.1016/j.geoderma.2021.114966

Cited by 15 publications

(8 citation statements)

References 79 publications

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“…In addition, a relatively high elemental Se was observed in the High SeO 3 2– group. Studies have shown that SeO 3 2– is affected by redox potential in soil and can be reduced gradually by soil microorganisms, where the toxicity of Se decreases with decreasing valence ( Piacenza et al, 2017 ; Wang et al, 2017 ; Zhai et al, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Selenium Nanoparticles as an Innovative Selenium Fertilizer Exert Less Disturbance to Soil Microorganisms

Jun

Chen

et al. 2021

Front. Microbiol.

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Selenium (Se) is an essential trace element in the human body. Se-enriched agricultural products, obtained by applying Se fertilizer, are important sources of Se supplement. However, Se fertilizer may cause a series of environmental problems. This study investigated the transformation of exogenous selenium nanoparticles (SeNPs) and selenite (SeO32–) in soil and explored their effects on soil microbial community and typical microorganisms. SeNPs exhibited a slow-release effect in soil, which promoted the growth of soil microorganisms and enriched soil probiotics. SeO32– was converted to a stable and low toxic state in soil, increasing persistent free radicals and decreasing microbial abundance and diversity. The influences of SeNPs and SeO32– on two typical soil microorganisms (Bacillus sp. and Escherichia coli) were also evaluated, and SeNPs were more difficult to enter into microorganisms directly, with lower toxicity and higher safety. These results indicated that SeNPs were a more environment-friendly Se additive for agriculture applications. This work provides useful information for better understanding the environmental fate and behavior of Se fertilizer in the soil.

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Section: Resultsmentioning

confidence: 99%

Selenium Nanoparticles as an Innovative Selenium Fertilizer Exert Less Disturbance to Soil Microorganisms

Jun

Chen

et al. 2021

Front. Microbiol.

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“…Other soil conditions like moisture and oxygen are also important factors in determining Se fractions by affecting metals, Eh, pH, dissolved organic matter, and microbial activity [ 31 ]. Decreasing soil Eh but increasing dissolved organic carbon under water-saturated conditions result in the reduction of Se(VI) into low valences like Se(IV), Se(0), or Se(-II) [ 32 ]. It is obvious that the Se forms in soil are largely dependent on soil pH, organic matter, Eh, and texture.…”

Section: Selenium Species and Fractions In Soilmentioning

confidence: 99%

“…For example, approximately 51% of China has Se-deficient soil [ 51 ]. Organic or inorganic forms of Se fertilizers are now widely applied in agriculture to enhance plants’ Se content [ 32 , 52 ], whereas a maximum of 10% of inorganic Se fertilizers can be acquired by plants [ 52 ]. The bioavailability of Se dramatically declines through adsorption with organic matters and metals, and through reduction and methylation processes as reviewed above.…”

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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“…It was reported that approximately 51% of China's land is Se deficient, and 39-61% of the Chinese population has a daily Se intake of approximately 26-34 µg, which is lower than the WHO/FAO recommended minimum intake of 50 µg•d −1 Se (WHO/ FAO, 1996;Dinh et al, 2018;Zhai et al, 2021). In the Keshan disease areas, the daily Se intake is even lower than 17 µg (Ge and Yang, 1993;Zhai et al, 2021). Thus, it is important to investigate the Se richness of representative crop (fruits)-producing areas in China.…”

Section: Introductionmentioning

confidence: 98%

“…According to the WHO report, China is one of the 40 Se-deficient countries in the world (Xu et al, 2010;Li et al, 2015;Dinh et al, 2018). It was reported that approximately 51% of China's land is Se deficient, and 39-61% of the Chinese population has a daily Se intake of approximately 26-34 µg, which is lower than the WHO/FAO recommended minimum intake of 50 µg•d −1 Se (WHO/ FAO, 1996;Dinh et al, 2018;Zhai et al, 2021). In the Keshan disease areas, the daily Se intake is even lower than 17 µg (Ge and Yang, 1993;Zhai et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Enrichment characteristics and dietary evaluation of selenium in navel orange fruit from the largest navel orange-producing area in China (southern Jiangxi)

et al. 2022

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Diet is the main intake source of selenium (Se) in the body. Southern Jiangxi is the largest navel orange-producing area in China, and 25.98% of its arable land is Se-rich. However, studies on the Se-rich characteristics and Se dietary evaluation of navel orange fruits in the natural environment of southern Jiangxi have not been reported. This study was large-scale and in situ samplings (n = 492) of navel oranges in southern Jiangxi with the goal of investigating the coupling relationships among Se, nutritional elements, and quality indicators in fruits and systematically evaluating Se dietary nutrition to the body. The results indicated that the average content of total Se in the flesh was 4.92 μg⋅kg–1, and the percentage of Se-rich navel oranges (total Se ≥ 10 μg⋅kg–1 in the flesh) was 7.93%, of which 66.74% of the total Se was distributed in the pericarp and 33.26% in the flesh. The average content of total Se in the flesh of Yudu County was the highest at 5.71 μg⋅kg–1. There was a significant negative correlation (p < 0.05) between Se, Cu, and Zn in the Se-rich flesh. According to the Se content in the flesh, the Se dietary nutrition evaluation was carried out, and it was found that the Se-enriched navel orange provided a stronger Se nutritional potential for the human body. These findings will help to identify Se enrichment in navel orange fruit in China’s largest navel orange-producing area and guide the selection of Se-rich soils for navel orange production in the future.

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Effects of soil moisture on aging of exogenous selenate in three different soils and mechanisms

Cited by 15 publications

References 79 publications

Selenium Nanoparticles as an Innovative Selenium Fertilizer Exert Less Disturbance to Soil Microorganisms

Selenium Nanoparticles as an Innovative Selenium Fertilizer Exert Less Disturbance to Soil Microorganisms

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

Enrichment characteristics and dietary evaluation of selenium in navel orange fruit from the largest navel orange-producing area in China (southern Jiangxi)

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