Effect of selenium-enriched organic material amendment on selenium fraction transformation and bioavailability in soil

Wang, Dan; Dinh, Quang Toan; Thu, Tran Thi Anh; Zhou, Fei; Yang, Wenxiao; Wang, Mengke; Song, Wei-Wei; Liang, Dong

doi:10.1016/j.chemosphere.2018.02.007

Cited by 72 publications

(30 citation statements)

References 34 publications

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“…2a and b). Moreover, the available Se and Zn contents in soil were signi cantly and positively (R 2 > 0.82, p < 0.01) correlated with the Se and Zn content in the shoots and roots of pak choi, respectively (Table 2); such result is consistent with the previous ndings (Qin et al 2016;Wang et al 2018;Xue et al 2020). The bioavailability of Se and Zn in soil may be affected by the following factors: (1) Soil pH (Rengel 2015): In this study, compared with the single Zn treatment, Se-Zn co-amended treatments signi cantly (p < 0.05) reduced the soil pH by 0.19-0.55 (Table 2) and then increased the available Zn content of the soil by 0.12-70.7% (Fig.…”

Section: Discussionsupporting

confidence: 91%

“…Notably, Se (1 and 2.5 mg/kg)-Zn co-amended treatments decreased soil pH compared with that of the corresponding single Se treatment because of the rhizosphere acidi cation caused by root exudation (Dinh et al 2018). Low molecular weight organic acids released by plant roots could dissolve and release stable Se in soil (Wang et al 2018), and then the available Se content of soil with Se-Zn co-amended treatments increased by 9.6-41.6% compared with the corresponding single Se treatment (Fig. 2a).…”

Section: Discussionmentioning

confidence: 99%

“…(4) Microbe-Se-Zn: microorganisms oxidized organic matter, thereby releasing Zn bound to organic matter in the rhizosphere (Zhao et al 2018). Moreover, microorganisms take up Se(VI) as terminal electron acceptors during respiration, which promoted the reduction of high-valent Se to low-valent Se and its combination with low molecules of humus (Wang et al 2018), thereby increasing the potential available Se content.…”

Section: Discussionmentioning

confidence: 99%

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Effects of Selenium–Zinc Interactions on the Bioavailability of Selenium/Zinc in Soil and Its Mechanism

Xue

Wang

Zhou

et al. 2021

Preprint

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Purpose Biofortification is a core strategy in solving the malnutrition of selenium (Se) and zinc (Zn) for global human being. However, whether Se and Zn co-biofortification can manipulate soil Se/Zn bioavailability and its mechanism still remains unclear. Methods The pot experiment was conducted to investigate the co-amendment of selenate and Zn sulfate on the growth of pak choi, especially on the uptake of Se and Zn, and to elucidate the effect of soil pH and soil enzyme activity on the bioavailability of Se/Zn in soil and its mechanism. Results Results showed that plant growth inhibition caused by the application of high Se rate was significantly alleviated with Zn supplements, and the biomass in the shoots and roots of pak choi in Se2.5Zn20 and Se2.5Zn50 treatments significantly increased (67.0%–112.8%) compared with the Se2.5Zn0 treatment. Additionally, Se and Zn co-amended application significantly enhanced soil available Se/Zn content compared with correspond single Se/Zn treatments. The increase of soil available Zn content could be attributed to the significant decrease in the soil pH, while the increase of soil available Se was from the biochemical conversion caused by the activity of catalase, urease, and alkaline phosphatase. Conclusion Se–Zn co-amendment can ameliorate bioavailability of Se/Zn in soil by regulate the pH and enzyme activity of soil.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effects of Selenium–Zinc Interactions on the Bioavailability of Selenium/Zinc in Soil and Its Mechanism

Xue

Wang

Zhou

et al. 2021

Preprint

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“…Iron oxide-bound Se is firmly fixed on the mineral surface, so it’s not readily absorbed by plants ( Qin et al., 2012 ). Organic-matter-bound Se is a potential source of available Se, and it can be released into soil solution and absorbed by plant through mineralization ( Kulp and Pratt, 2004 ; Wang et al., 2018 ). Some reports have indicated that low molecular weight organic acids (LMWOAs) play a key role in mobilizing Se, thus greatly increasing bioavailable Se ( Qin et al., 2004 ).…”

Section: Introductionmentioning

confidence: 99%

The Interaction of Arbuscular Mycorrhizal Fungi and Phosphorus Inputs on Selenium Uptake by Alfalfa (Medicago sativa L.) and Selenium Fraction Transformation in Soil

Pan

Zhang

et al. 2020

Front. Plant Sci.

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Selenium (Se) is a beneficial element to plants and an essential element to humans. Colonization by arbuscular mycorrhizal fungi (AMF) and supply of phosphorus (P) fertilizer may affect the bioavailability of Se in soils and the absorption of Se by plants. To investigate the interaction between AMF and P fertilizer on the transformation of soil Se fractions and the availability of Se in the rhizosphere of alfalfa, we conducted a pot experiment to grow alfalfa in a loessial soil with three P levels (0, 5, and 20 mg kg-1) and two mycorrhizal inoculation treatments (without mycorrhizal inoculation [−AMF] and with mycorrhizal inoculation [+AMF]), and the interaction between the two factors was estimated with two-way ANOVA. The soil in all pots was supplied with Se (Na 2 SeO 3) at 1 mg kg-1. In our results, shoot Se concentration decreased, but plant Se content increased significantly as P level increased and had a significant positive correlation with AMF colonization rate. The amount of total carboxylates in the rhizosphere was strongly affected by AMF. The amounts of rhizosphere carboxylates and alkaline phosphatase activity in the +AMF and 0P treatments were significantly higher than those in other treatments. The concentration of exchangeable-Se in rhizosphere soil had a positive correlation with carboxylates. We speculated that rhizosphere carboxylates promoted the transformation of stable Se (iron oxide-bound Se) into available Se forms, i.e. exchangeable Se and soluble Se. Colonization by AMF and low P availability stimulated alfalfa roots to release more carboxylates and alkaline phosphatase. AMF and P fertilizer affected the transformation of soil Se fractions in the rhizosphere of alfalfa.

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“…This number is likely increasing due to the global climate-change, which is predicted to be associated with a dramatic reduction of soil Se content, especially in agricultural areas where soil Se is commonly lower than 2 ppm [12]. These soils are the most common worldwide [13] and areas with extremely low Se levels occur in parts of China, north western Europe and parts of eastern Europe, Southern Brazil and sub-Saharan Africa [14].…”

Section: Introductionmentioning

confidence: 99%

Selenium Biofortification Differentially Affects Sulfur Metabolism and Accumulation of Phytochemicals in Two Rocket Species (Eruca Sativa Mill. and Diplotaxis Tenuifolia) Grown in Hydroponics

Dall’Acqua

Ertani

Pilon‐Smits

et al. 2019

Plants

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Biofortification can be exploited to enrich plants in selenium (Se), an essential micronutrient for humans. Selenium as selenate was supplied to two rocket species, Eruca sativa Mill. (salad rocket) and Diplotaxis tenuifolia (wild rocket), at 0–40 μM in hydroponics and its effects on the content and profile of sulphur (S)-compounds and other phytochemicals was evaluated. D. tenuifolia accumulated more total Se and selenocysteine than E. sativa, concentrating up to ~300 mg Se kg−1 dry weight from 10–40 μM Se. To ensure a safe and adequate Se intake, 30 and 4 g fresh leaf material from E. sativa grown with 5 and 10–20 μM Se, respectively or 4 g from D. tenuifolia supplied with 5 μM Se was estimated to be optimal for consumption. Selenium supplementation at or above 10 μM differentially affected S metabolism in the two species in terms of the transcription of genes involved in S assimilation and S-compound accumulation. Also, amino acid content decreased with Se in E. sativa but increased in D. tenuifolia and the amount of phenolics was more reduced in D. tenuifolia. In conclusion, selenate application in hydroponics allowed Se enrichment of rocket. Furthermore, Se at low concentration (5 μM) did not significantly affect accumulation of phytochemicals and plant defence S-metabolites.

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Effect of selenium-enriched organic material amendment on selenium fraction transformation and bioavailability in soil

Cited by 72 publications

References 34 publications

Effects of Selenium–Zinc Interactions on the Bioavailability of Selenium/Zinc in Soil and Its Mechanism

Effects of Selenium–Zinc Interactions on the Bioavailability of Selenium/Zinc in Soil and Its Mechanism

The Interaction of Arbuscular Mycorrhizal Fungi and Phosphorus Inputs on Selenium Uptake by Alfalfa (Medicago sativa L.) and Selenium Fraction Transformation in Soil

Selenium Biofortification Differentially Affects Sulfur Metabolism and Accumulation of Phytochemicals in Two Rocket Species (Eruca Sativa Mill. and Diplotaxis Tenuifolia) Grown in Hydroponics

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