Coronatine-insensitive 1 (COI1) mediates transcriptional responses of Arabidopsis thaliana to external potassium supply

Armengaud, P., Breitling, R. and Amtmann, A. (2010) Coronatine-insensitive 1 (COI1) mediates transcriptional responses of Arabidopsis thaliana to external potassium supply. Molecular Plant, 3(2), pp. 390-405. (doi: 10.1093/mp/ssq012) (PMID:20339157) (PMCID:PMC2845782)

Abstract

The ability to adjust growth and development to the availability of mineral nutrients in the soil is an essential life skill of plants but the underlying signaling pathways are poorly understood. In <i>Arabidopsis thaliana</i>, shortage of potassium (K) induces a number of genes related to the phytohormone jasmonic acid (JA). Using comparative microarray analysis of wild-type and coi1-16 mutant plants, we classified transcriptional responses to K with respect to their dependence on COI1, a central component of oxylipin signaling. Expression profiles obtained in a short-term experiment clearly distinguished between COI1-dependent and COI1-independent K-responsive genes, and identified both known and novel targets of JA-COI1-signaling. During long-term K-deficiency, coi-16 mutants displayed de novo responses covering similar functions as COI1-targets except for defense. A putative role of JA for enhancing the defense potential of K-deficient plants was further supported by the observation that plants grown on low K were less damaged by thrips than plants grown with sufficient K.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Breitling, Professor Rainer and Armengaud, Dr Patrick and Amtmann, Professor Anna
• Authors: Armengaud, P., Breitling, R., and Amtmann, A.
• Subjects: Q Science > QH Natural history > QH345 Biochemistry; Q Science > QH Natural history > QH301 Biology
• College/School: College of Medical Veterinary and Life Sciences > School of Molecular Biosciences
• Journal Name: Molecular Plant
• Publisher: Oxford University Press is association with the Molecular Plant Shanghai Editorial Office
• ISSN: 1674-2052
• ISSN (Online): 1752-9867
• Copyright Holders: Copyright © 2010 The Authors
• First Published: First published in Molecular Plant 3(2):390-405
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher.

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
31939	1	Elucidating signalling pathways in plant K homeostasis on the basis of gene expression patterns	Anna Amtmann	Biotechnology and Biological Sciences Research Council (BBSRC)	P17237	Institute of Molecular Cell and Systems Biology
41113	1	Inorganic ions and plant metabolism - target, signals and responses	Anna Amtmann	Biotechnology and Biological Sciences Research Council (BBSRC)	BB/D006775/1	Institute of Molecular Cell and Systems Biology