A peptide hormone required for Casparian strip diffusion barrier formation in Arabidopsis roots

• Nakayama, Takuya

• Shinohara, Hidefumi

• Tanaka, Mina

• Baba, Koki

• Ogawa-Ohnishi, Mari

• Matsubayashi, Yoshikatsu

Bibliographic Information

Other Title

• A peptide hormone required for Casparian strip diffusion barrier formation in <i>Arabidopsis</i> roots

Abstract

Plants achieve mineral ion homeostasis by means of a hydrophobic barrier on endodermal cells called the Casparian strip, which restricts lateral diffusion of ions between the root vascular bundles and the soil. We identified a family of sulfated peptides required for contiguous Casparian strip formation in Arabidopsis roots. These peptide hormones, which we named Casparian strip integrity factor 1 (CIF1) and CIF2, are expressed in the root stele and specifically bind the endodermis-expressed leucine-rich repeat receptor kinase GASSHO1 (GSO1)/SCHENGEN3 and its homolog, GSO2. A mutant devoid of CIF peptides is defective in ion homeostasis in the xylem. CIF genes are environmentally responsive. Casparian strip regulation is not merely a passive process driven by root developmental cues; it also serves as an active strategy to cope with adverse soil conditions.

Journal

• Science

  Science 355 (6322), 284-286, 2017-01

  American Association for the Advancement of Science

Keywords

• Multidisciplinary

Details

• CRID: 1050564288759164928
• NII Article ID: 120006024333
• DOI: 10.1126/science.aai9057
• ISSN: 10959203
• ISSN: 00368075
• HANDLE: 2237/25993
• Web Site: https://nagoya.repo.nii.ac.jp/records/23832
• Web Site: https://www.science.org/doi/pdf/10.1126/science.aai9057
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN