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IIGB Seminar Dr. Steffen Abel - April 25, 2017 @ 2:10pm

Tuesday, April 25, 2017
  2:10–3 p.m.

Location: Genomics Building
  Parking Information

Category: Seminar


Dear Faculty, Postdocs, Students, and Friends:

You are cordially invited to attend a Special Seminar presented by the Institute for Integrative Genome Biology





Dr. Steffen Abel

Department of Molecular Signaling Processing

Leibniz Institute of Plant Biochemistry



“Phosphate Sensing in Root Development”

DATE: Tuesday, April 25, 2017

 LOCATION: Genomics Auditorium, RM 1102A

Time: 2:10 PM


Host: Dr. Katie Dehesh


Abstract: Plant root development is informed by numerous edaphic cues. Phosphate availability impacts root system architecture by adjusting meristem activity; however, the sensory mechanisms monitoring external phosphate status are elusive. Two functionally interacting Arabidopsis genes, LPR1 (ferroxidase) and PDR2 (P5-type ATPase), are key players in root phosphate sensing, which is modified by iron availability. The LPR1-PDR2 module facilitates, upon phosphate limitation, cell type-specific, apoplastic Fe and callose deposition in the meristem and elongation zone of primary roots. Expression of cell wall-targeted LPR1 determines the sites of Fe accumulation as well as callose production, which interferes with symplastic communication in the stem cell niche, as demonstrated by impaired SHORT-ROOT movement. Antagonistic interactions of phosphate and iron availability control primary root growth via meristem-specific callose formation, likely triggered by LPR1-dependent redox signaling. Thus, callose regulated cell-to-cell signaling in root meristems is linked to the perception of an abiotic cue. 

Open to: General Public
Admission: Free
Sponsor: Institute for Integrative Genome Biology

Contact Information:
Institute for Integrative Genome Biology
(951) 827-7177