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<p>Antimony (Sb), a non-essential heavy metal, exerts severe toxic effects on the growth and development of plants. This study investigated the response of <i>Brassica napus</i> to Sb(III) stress under hydroponic conditions, focusing on Sb accumulation, physiological indexes, and transcriptome sequencing. Sb accumulation in different <i>B. napus</i> varieties showed consistent trends with physiological indicators (SOD, POD, CAT, MDA) in XZY512 root tissue. Both parameters increased with Sb concentration, reaching a peak at 75&#xa0;mg/L before declining, suggesting that 75&#xa0;mg/L Sb may be the optimal concentration for <i>B. napus</i> adaptation. Transcriptomic analysis identified 8,802 genes in root tissues and 13,612 genes in leaf tissues responsive to Sb stress, predominantly involved in oxidative stress responses, ABC transporters, glutathione metabolism, plant hormone signaling, and MAPK pathways. Physiological index changes were associated with upregulation of genes linked to antioxidants, including as <i>CATs</i>, <i>GPXs</i>, <i>PERs</i>, and <i>GSTUs</i>, in root tissues, whereas photosynthesis-related genes were mostly downregulated in leaf tissues. This work shows the potential of <i>B. napus</i> for phytoremediation efforts and offers important insights into its response mechanisms to Sb stress.</p>

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Transcriptome profiles of leaves and roots of Brassica napus L. in response to antimony stress

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月19日

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  • Xianjun Liu,
  • Liang You,
  • Wencong Yu,
  • Yuhui Yuan,
  • Wei Zhang,
  • Mingli Yan,
  • Yu Zheng,
  • Renyan Duan,
  • Guiyuan Meng,
  • Yong Chen,
  • Zhongsong Liu,
  • Guohong Xiang

摘要

Antimony (Sb), a non-essential heavy metal, exerts severe toxic effects on the growth and development of plants. This study investigated the response of Brassica napus to Sb(III) stress under hydroponic conditions, focusing on Sb accumulation, physiological indexes, and transcriptome sequencing. Sb accumulation in different B. napus varieties showed consistent trends with physiological indicators (SOD, POD, CAT, MDA) in XZY512 root tissue. Both parameters increased with Sb concentration, reaching a peak at 75 mg/L before declining, suggesting that 75 mg/L Sb may be the optimal concentration for B. napus adaptation. Transcriptomic analysis identified 8,802 genes in root tissues and 13,612 genes in leaf tissues responsive to Sb stress, predominantly involved in oxidative stress responses, ABC transporters, glutathione metabolism, plant hormone signaling, and MAPK pathways. Physiological index changes were associated with upregulation of genes linked to antioxidants, including as CATs, GPXs, PERs, and GSTUs, in root tissues, whereas photosynthesis-related genes were mostly downregulated in leaf tissues. This work shows the potential of B. napus for phytoremediation efforts and offers important insights into its response mechanisms to Sb stress.