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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Transcriptional regulatory network triggered by oxidative signals configures the early response mechanisms of japonica rice to chilling stress
BMC Plant Biology, Volume 10, Article 16, Year 2010
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Description
Background: 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°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.Results: Regulatory clusters responding directly to oxidative signals were prominent during the initial 6 to 12 hours at 10°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 DREB/CBF, RAP2 and RAV1 factors acting on DRE/CRT/rav1-like enriched clusters and bZIP factors acting on ABRE-like enriched clusters. Oxidative-mediated clusters were activated earlier than ABA-mediated clusters.Conclusion: Genome-wide, physiological and whole-plant level analyses established a holistic view of chilling stress response mechanism of japonica rice. Early response regulatory network triggered by oxidative signals is critical for prolonged survival under sub-optimal temperature. Integration of stress and developmental responses leads to modulated growth and vigor maintenance contributing to a delay of plastic injuries. © 2010 Yun et al; licensee BioMed Central Ltd.
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Authors & Co-Authors
Yun, Kil Young
United States, Orono
University of Maine
Park, Myoung Ryoul
United States, Orono
University of Maine
Mohanty, Bijayalaxmi
South Africa, Bellville
University of the Western Cape
Singapore, Singapore City
National University of Singapore
Herath, Venura
United States, Orono
University of Maine
Xu, Fuyu
United States, Orono
University of Maine
Mauleon, Ramil
Philippines, Makati
International Rice Research Institute
Wijaya, Edward
Japan, Tsukuba
National Institute of Advanced Industrial Science and Technology
Bajic, Vladimir B.
Saudi Arabia, Thuwal
King Abdullah University of Science and Technology
Bruskiewich, Richard
Philippines, Makati
International Rice Research Institute
de los Reyes, Benildo G.
United States, Orono
University of Maine
Statistics
Citations: 184
Authors: 10
Affiliations: 6
Identifiers
Doi:
10.1186/1471-2229-10-16
e-ISSN:
14712229
Research Areas
Violence And Injury