Is selenium beneficial or detrimental to earthworm? Growth and metabolism responses of Eisenia Fetida to Na2SeO3 exposure
| Autor: | Wenyou Qin, Meng Zhang, Xuan Zhou, Xiuqing Shao, Qiuyun Xu, Yajuan Shi, Li Qian |
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| Rok vydání: | 2022 |
| Předmět: |
Eisenia fetida
Environmental Engineering biology Earthworm chemistry.chemical_element Metabolism biology.organism_classification Pollution Methylselenocysteine chemistry.chemical_compound Metabolic pathway chemistry Valine Environmental Chemistry Food science Growth inhibition Waste Management and Disposal Selenium |
| Zdroj: | Science of The Total Environment. 807:150770 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2021.150770 |
| Popis: | Se unevenly distributed in soils due to variations of geology and anthropogenic input, which results in different effects on earthworms. The effects of Se were characterized by analyzing the growth and metabolism responses of earthworms after exposure to three different concentrations of Na2SeO3. The results showed that except the possible growth promotion at 5 mg/kg, low and middle-level exposure to Na2SeO3 (0.3–10 mg/kg) did not significantly affect the growth of earthworms. While a significant inhibition effect on growth was observed in the high-level exposure group (30–70 mg/kg). There was an inflection point for Se performing promotion to inhibition effects on earthworm growth. To investigate the metabolic response of earthworms, a novel HPLC-ESI-MS (High Performance Liquid Chromatography-Electrospray Ionization-Mass Spectrometry) method was used to determine sensitive biomarkers. Selenium exposure significantly altered the metabolism of seven essential amino acids, namely tyrosine, leucine, phenylalanine, valine, alanine, glycine, and lysine, and two selenoamino acids, namely selenomethionine and methylselenocysteine. The overall metabolism level of earthworms was not affected at low exposure concentrations, but was affected at medium and high exposure concentrations. The metabolic pathways that integrated the selenocompound metabolism and the tricarboxylic acid cycle from the perspective of energy supply and demand were affected by Na2SeO3 exposure. The derived reactive oxygen species at high exposure concentrations were probably the reason for the growth inhibition effect of Se on earthworms. This study provides biochemical insights into the effects of Na2SeO3 on earthworms and suggests that an Se concentration of about 2.3 mg/kg is appropriate for soil organism health. |
| Databáze: | OpenAIRE |
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