Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 170, Issue 1, Pages 93-100Publisher
ELSEVIER GMBH
DOI: 10.1016/j.jplph.2012.08.019
Keywords
OrbHLH001; Transcription factors; Ion flux; E-box; Salt tolerance
Categories
Funding
- Research Program from the Chinese Ministry of Agriculture [2011ZX08009-003-002]
- Innovation Grants of the Chinese Academy of Sciences
Ask authors/readers for more resources
The basic helix-loop-helix family of proteins, which function as transcription factors, have been intensively studied in plants and animals. However, the molecular mechanism of these factors contributing to stress tolerance is unknown. Here, We report on the overexpression of OrbHLH001 from Dongxiang wild rice (Oryza rufipogon) conferring salt tolerance in transgenic rice plants. The expression of OrbHLH001 was tissue specific, mainly in phloem tissues throughout the plant. Ion assay with the scanning ion-selective electrode technique showed that NaCl stress has a greater influence on Na+ efflux and K+ influx in OrbHLH001-overexpressed plants than the wild type. OrbHLH001 protein can induce the expression of OsAKT1 to regulate the Na+/K+ ratio in OrbHLH001-overexpressed plants by specifically binding to an E-box motif in the promoter region of OsAKT1. The Mechanism may have potential use in rice molecular breeding. (c) 2012 Elsevier GmbH. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available