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Plant and Cell Physiology Advance Access published online on January 16, 2008
Plant and Cell Physiology, doi:10.1093/pcp/pcn008
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© The Author 2008. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

Comparative Transcriptome of Diurnally Oscillating Genes and Hormone-Responsive Genes in Arabidopsis thaliana: Insight into Clock-Controlled Daily Responses to Common Ambient Stresses in Plants

Takeshi Mizuno and Takafumi Yamashino1

Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University, Chikusa-ku, Nagoya 464-8601, Japan.

1Corresponding author: Dr. Takafumi Yamashino, Address: Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University, Furocho, Chikusa-ku, Nagoya, 464-8601, Japan. E-mail: yamasino{at}agr.nagoya-u.ac.jp, Tel: +81-52-789-4090, Fax: +81-52-789-4091


  Abstract

By adopting two distinct types of comprehensive transcriptome datasets, which are available for public, we asked the critical question as to whether or not there is any significant correlation between the diurnally oscillating genes during the light/dark daily cycle and the hormone-responsive genes. The hormones, concerned in this study, were abscisic acid, ethylene, brassinosteroid, cytokinin, gibberellin, auxin, and jasmonate. Here, it was revealed that the expressions of a significantly large number of abscisic acid (ABA)-responsive and/or methyl jasmonate (MJ)-responsive genes oscillate diurnally and robustly during the light/dark cycle. The results of this study implied that some aspects of plant stress responses, basically mediated by ABA and/or MJ, might be regulated daily thought the clock function at the level of transcription in order to prepare properly against common ambient stresses by anticipating the diurnal day/night cycle.

Keywords: Arabidopsis - Circadian rhythm - Hormone response - Microarray - Stress response

(Received November 20, 2007; Accepted January 8, 2008)
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