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- W4387266483 abstract "Tea plants ( Camellia sinensis ) show discrepancies in selenium accumulation and transportation, the molecular mechanisms of which are not well understood. Hence, we aimed to conduct a systematic investigation of selenium accumulation and transportation mechanisms in different tea cultivars via transcriptome analysis. The Na 2 SeO 3 and Na 2 SeO 4 treatments improved selenium contents in the roots and leaves of three tea cultivars. The high selenium-enrichment ability (HSe) tea cultivars accumulated higher selenium contents in the leaves than did the low selenium-enrichment ability (LSe) tea cultivars. Transcriptome analysis revealed that differentially expressed genes (DEGs) under the Na 2 SeO 3 and Na 2 SeO 4 treatments were enriched in flavonoid biosynthesis in leaves. DEGs under the Na 2 SeO 3 treatment were enriched in glutathione metabolism in the HSe tea cultivar roots compared to those of the LSe tea cultivar. More transporters and transcription factors involved in improving selenium accumulation and transportation were identified in the HSe tea cultivars under the Na 2 SeO 3 treatment than in the Na 2 SeO 4 treatment. In the HSe tea cultivar roots, the expression of sulfate transporter 1;2 ( SULTR1;2 ) and SULTR3;4 increased in response to Na 2 SeO 4 exposure. In contrast, ATP-binding cassette transporter genes ( ABC s), glutathione S -transferase genes ( GST s), phosphate transporter 1;3 ( PHT1;3 ), nitrate transporter 1 ( NRT1 ), and 34 transcription factors were upregulated in the presence of Na 2 SeO 3 . In the HSe tea cultivar leaves, ATP-binding cassette subfamily B member 11 ( ABCB11 ) and 14 transcription factors were upregulated under the Na 2 SeO 3 treatment. Among them, WRKY75 was explored as a potential transcription factor that regulated the accumulation of Na 2 SeO 3 in the roots of HSe tea cultivars. This study preliminary clarified the mechanism of selenium accumulation and transportation in tea cultivars, and the findings have important theoretical significance for the breeding and cultivation of selenium-enriched tea cultivars." @default.
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- W4387266483 date "2023-10-02" @default.
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- W4387266483 title "Comparative transcriptomics provides novel insights into the mechanisms of selenium accumulation and transportation in tea cultivars (Camellia sinensis (L.) O. Kuntze)" @default.
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- W4387266483 doi "https://doi.org/10.3389/fpls.2023.1268537" @default.
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