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)

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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:Armengaud, Dr Patrick and Amtmann, Professor Anna and Breitling, Professor Rainer
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 > Institute of Molecular Cell and Systems Biology
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.

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
319391Elucidating signalling pathways in plant K homeostasis on the basis of gene expression patternsAnna AmtmannBiotechnology and Biological Sciences Research Council (BBSRC)P17237Institute of Molecular Cell and Systems Biology
411131Inorganic ions and plant metabolism - target, signals and responsesAnna AmtmannBiotechnology and Biological Sciences Research Council (BBSRC)BB/D006775/1Institute of Molecular Cell and Systems Biology