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    • Screening and Identification of Soil Selenium-Enriched Strains and Application in Auricularia Auricula

    Yadong Chen, Zhenghan Liu,Weimin Zeng, Yang Liu,Dandan Zhao,Yanlong Zhang,Xiangqian Jia

    Microorganisms（2024）

    Heilongjiang Univ

    Cited 0|Views9
    Abstract
    Selenium (Se) is an essential trace element for human physiological metabolism. The application of organic Se as a source to cultivate Se-rich plants for micronutrient supplementation has been receiving increasing attention. In our study, a bacterial strain named H1 was isolated from the soil in Heilongjiang Province, China, and under optimal culture conditions, the unit Se content could reach 3000 μg·g−1 and its 16S ribosomal DNA sequence seemed to be a new molecular record of an Enterobacter species. After the domestication of Se tolerance and Se-rich experiments, H1 can be used as a Se source for cultivation of Se-rich Auricularia auricula. The results showed that soluble protein, soluble sugar, free amino acid and vitamin C contents in Auricularia auricula were notably increased by 28.7%, 21.8%, 32.5% and 39.2% under the treatment of Se concentration of 0.24 mg·kg−1, respectively. These findings enhance our understanding that H1 is more conducive to Se uptake and nutrient accumulation.
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    Key words
    Se,bacterial strain,Enterobacter,organic Se,Auricularia auricula
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