Overexpression of a trehalose-6-phosphate synthase/phosphatase fusion gene enhances tolerance and photosynthesis during drought and salt stress without growth aberrations in tomato

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Title
Overexpression of a trehalose-6-phosphate synthase/phosphatase fusion gene enhances tolerance and photosynthesis during drought and salt stress without growth aberrations in tomato
Author(s)
Jae Il Lyu; Sung Ran Min; Jeong Hee Lee; Y H Lim; J K Kim; C H Bae; Jang Ryol Liu
Bibliographic Citation
Plant Cell Tissue and Organ Culture, vol. 112, no. 2, pp. 257-262
Publication Year
2013
Abstract
Trehalose is a non-reducing disaccharide of glucose that confers tolerance against abiotic stresses in many diverse organisms, including higher plants. It was previously reported that overexpression of the yeast trehalose-6-phosphate synthase gene in tomato results in improved tolerance against abiotic stresses. However, these transgenic tomato plants had stunted growth and pleiotropic changes in appearance. In this study, transgenic tomato plants were generated by the introduction of a gene encoding a bifunctional fusion of trehalose-6-phosphate synthase and trehalose-6-phosphate phosphatase genes from Escherichia coli under the control of the CaMV35S promoter. Transgenic plants accumulated higher levels of trehalose in their leaves and exhibited enhanced drought and salt tolerance and photosynthetic rates under salt stress conditions than wild-type plants. All of the transgenic plants had normal growth patterns and appearances. Therefore, the system described in this study can be used for practical application of the gene in crop improvement.
Keyword
Solanum lycopersicumTomatoTransgenic plantsTrehaloseTrehalose-6-phosphate synthase/phosphatase
ISSN
0167-6857
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s11240-012-0225-7
Type
Article
Appears in Collections:
Division of Research on National Challenges > Plant Systems Engineering Research > 1. Journal Articles
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