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Clathrin-mediated endocytosis regulates root endodermal suberization via ROS.

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Summary
This summary is machine-generated.

Endomembrane trafficking regulates root suberization in Arabidopsis. Disrupting clathrin-mediated endocytosis or exocytosis causes ectopic suberin deposition, mediated by reactive oxygen species.

Keywords:
ArabidopsisROSendocytosisendodermissuberin

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Area of Science:

  • Plant Biology
  • Cell Biology
  • Molecular Biology

Background:

  • Endomembrane trafficking (ET) is vital for plant stress adaptation.
  • Its role in endodermal root suberization is largely unknown.
  • Root suberization forms a critical apoplastic barrier.

Purpose of the Study:

  • To investigate the role of endomembrane trafficking in Arabidopsis root endodermal suberization.
  • To elucidate the specific pathways involved in regulating suberin deposition.
  • To understand the molecular mechanisms linking membrane trafficking to barrier formation.

Main Methods:

  • Genetic disruption of endocytosis and exocytosis pathways.
  • Pharmacological inhibition of clathrin-mediated endocytosis (CME).
  • Analysis of suberin deposition, signaling pathways (CIFs-SGN3-SGN1-RBOHF/D), and reactive oxygen species (ROS) production.

Main Results:

  • Disruption of CME or exocytosis induced ectopic suberin deposition in the root endodermis.
  • CME inhibition triggered suberization via the CIFs-SGN3-SGN1-RBOHF/D axis and ROS.
  • RBOHF accumulation at the plasma membrane led to H2O2 production, driving suberization.

Conclusions:

  • Endomembrane trafficking critically controls endodermal root suberization in Arabidopsis.
  • Distinct ET pathways regulate suberization, with CME acting through ROS.
  • This links membrane trafficking to apoplastic barrier formation via ROS signaling.