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<p>As a group of concerned organic pollutants, polyfluoroalkyl substances (PFAS) are able to accumulate in crops, thereby posing potential ecological risks. Phytohormone herbicides, such as indole-3-acetic acid (IAA), are widely used in agriculture to control weeds. Here, we found that IAA at environmentally relevant concentrations promoted the absorption and translocation of 6:2 chlorinated polyfluoroalkyl ether sulfonate (6:2 Cl-PFESA) in wheat via activated multiple channel proteins. Furthermore, IAA facilitated unloading of 6:2 Cl-PFESA from cortex to xylem, thereby significantly promoting its translocation. The conformation transformation of channel proteins regulated by IAA greatly promotes dissociation of 6:2 Cl-PFESA from the bound proteins. The electrostatic interaction between 6:2 Cl-PFESA and gate residues enlarges the channel radius and promotes its absorption. These findings provide the evidence regarding the potential ecological risks associated with 6:2 Cl-PFESA accumulation in wheat caused by the application of IAA in agriculture.</p>

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Environmental levels of indole-3-acetic acid enhance the uptake and translocation of polyfluoroalkyl ether sulfonates in wheat

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月3日

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  • Shuxing Li,
  • Jian Zhou,
  • Yaqi Zheng,
  • Zichen Wang,
  • Sai Bai,
  • Yutong Zhang,
  • Kuok Ho Daniel Tang,
  • Hao Chen,
  • Lin Wu,
  • Chiyue Ma,
  • Tiecheng Wang,
  • Hanzhong Jia,
  • Lingyan Zhu

摘要

As a group of concerned organic pollutants, polyfluoroalkyl substances (PFAS) are able to accumulate in crops, thereby posing potential ecological risks. Phytohormone herbicides, such as indole-3-acetic acid (IAA), are widely used in agriculture to control weeds. Here, we found that IAA at environmentally relevant concentrations promoted the absorption and translocation of 6:2 chlorinated polyfluoroalkyl ether sulfonate (6:2 Cl-PFESA) in wheat via activated multiple channel proteins. Furthermore, IAA facilitated unloading of 6:2 Cl-PFESA from cortex to xylem, thereby significantly promoting its translocation. The conformation transformation of channel proteins regulated by IAA greatly promotes dissociation of 6:2 Cl-PFESA from the bound proteins. The electrostatic interaction between 6:2 Cl-PFESA and gate residues enlarges the channel radius and promotes its absorption. These findings provide the evidence regarding the potential ecological risks associated with 6:2 Cl-PFESA accumulation in wheat caused by the application of IAA in agriculture.