Overexpression of the CBF2 transcriptional Activator Enhances Oxidative Stress Tolerance in Arabidopsis Plants
- Ron Porat
- Michal Sharabi-Schwager
- Alon Samach
Abstract
The C-repeat/dehydration-responsive-element binding factor genes (CBF1-3) are transcriptional activators
involved in governing plant responses to low temperatures; their overexpression enhances plant frost tolerance.
We found that overexpression of CBF2 in Arabidopsis enhanced oxidative stress tolerance as compared with
wild-type plants, an effect that was manifested in: increased seed germination rates on Petri dishes containing
H2O2; delayed leaf senescence following incubation with H2O2; and delayed wilting and senescence after
spraying whole plants with paraquat, a generator of superoxide radicals. Transcript profiling analysis using the
Affymetrix ATH1 genome array revealed that overexpression of CBF2 did not affect expression of reactive
oxygen-scavenging genes but rather, remarkably enhanced expression of oxidative-stress-responsive
transcription factor genes. Overall, the present findings suggest that overexpression of CBF2 in Arabidopsis
enhances oxidative stress tolerance, most likely via activation of a network interaction among stress-related
transcription-factor genes.
- Full Text:
PDF
- DOI:10.5539/ijb.v3n2p94
Journal Metrics
h-index (December 2021 ): 37
i10-index (December 2021 ): 149
h5-index (December 2021 ): N/A
h5-median (December 2021 ): N/A
Index
- ACNP
- AGRICOLA
- BASE (Bielefeld Academic Search Engine)
- CAB Abstracts
- CiteFactor
- CNKI Scholar
- CrossRef
- DTU Library
- Elektronische Zeitschriftenbibliothek (EZB)
- Excellence in Research for Australia (ERA)
- Google Scholar
- Infotrieve
- LIVIVO (ZB MED)
- LOCKSS
- Max Planck Institutes
- MIAR
- PKP Open Archives Harvester
- Qualis/CAPES
- ResearchGate
- ROAD
- SafetyLit
- SHERPA/RoMEO
- Technische Informationsbibliothek (TIB)
- Universe Digital Library
- WorldCat
Contact
- Ryan JonesEditorial Assistant
- ijb@ccsenet.org