Transcriptional regulatory network triggered by oxidative signals configures the early response mechanisms of japonica rice to chilling stress.

BMC Plant Biology
Kil-Young YunB G de los Reyes

Abstract

The transcriptional regulatory network involved in low temperature response leading to acclimation has been established in Arabidopsis. In japonica rice, which can only withstand transient exposure to milder cold stress (10 degrees C), an oxidative-mediated network has been proposed to play a key role in configuring early responses and short-term defenses. The components, hierarchical organization and physiological consequences of this network were further dissected by a systems-level approach. Regulatory clusters responding directly to oxidative signals were prominent during the initial 6 to 12 hours at 10 degrees C. Early events mirrored a typical oxidative response based on striking similarities of the transcriptome to disease, elicitor and wounding induced processes. Targets of oxidative-mediated mechanisms are likely regulated by several classes of bZIP factors acting on as1/ocs/TGA-like element enriched clusters, ERF factors acting on GCC-box/JAre-like element enriched clusters and R2R3-MYB factors acting on MYB2-like element enriched clusters.Temporal induction of several H2O2-induced bZIP, ERF and MYB genes coincided with the transient H2O2 spikes within the initial 6 to 12 hours. Oxidative-independent responses involve...Continue Reading

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Datasets Mentioned

BETA
GSE8767
GSE10062

Methods Mentioned

BETA
electrophoretic mobility shift assay
transgenic
GTPase
environmental stress
protein folding
PCR
in vitro transcription
Assay
electrophoresis

Software Mentioned

DB
OSADJCAP
RAP
MeV Bioinformatics Tools
PLACE
TRANSFAC
Dragon Motif Builder
Gramene
AGRIS

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