We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Expression of StMYBIR-1, a Novel Potato Single MYB-Like Domain Transcription Factor, Increases Drought Tolerance.
- Authors
Dongjin Shin; Seok-Jun Moon; Seyoun Han; Beom-Gi Kim; Sang Ryeol Park; Seong-Kon Lee; Hye-Jin Yoon; Hye Eun Lee; Hawk-Bin Kwon; Dongwon Baek; Bu Young Yi; Myung-Ok Byun
- Abstract
Potato (Solanum tuberosum) is relatively vulnerable to abiotic stress conditions such as drought, but the tolerance mechanisms for such stresses in potato are largely unknown. To identify stress-related factors in potato, we previously carried out a genetic screen of potato plants exposed to abiotic environmental stress conditions using reverse northern-blot analysis. A cDNA encoding a putative R1-type MYB-like transcription factor (StMYB1R-1) was identified as a putative stress-response gene. Here, the transcript levels of StMYB1R-1 were enhanced in response to several environmental stresses in addition to drought but were unaffected by biotic stresses. The results of intracellular targeting and quadruple 9-mer protein-binding microarray analysis indicated that StMYBIR-1 localizes to the nucleus and binds to the DNA sequence G/A GATAA. Overexpression of a StMYB1R-1 transgene in potato plants improved plant tolerance to drought stress while having no significant effects on other agricultural traits. Transgenic plants exhibited reduced rates of water loss and more rapid stomatal closing than wild-type plants under drought stress conditions. In addition, overexpression of StMYB1R-1 enhanced the expression of drought-regulated genes such as AtHB-7, RD28, ALDH22a1, and ERD1-like. Thus, the expression of StMYBIR-1 in potato enhanced drought tolerance via regulation of water loss. These results indicated that StMYB1R-I functions as a transcription factor involved in the activation of drought-related genes.
- Subjects
POTATOES; TRANSCRIPTION factors; DROUGHTS; PROTEIN binding; GENE expression in plants
- Publication
Plant Physiology, 2011, Vol 155, Issue 1, p421
- ISSN
0032-0889
- Publication type
Article
- DOI
10.1104/pp.110.163634