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. ISSN 1674-2052 (doi:10.1093/mp/ssq012)
Available under License Creative Commons Attribution Non-commercial.
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 Arabidopsis thaliana, 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.
|Glasgow Author(s):||Armengaud, Dr Patrick and Amtmann, Dr Anna and Breitling, Prof 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|
|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.|