Enhanced drought and oxidative stress tolerance in transgenic sweetpotato expressing a codA gene = CodA 고발현 형질전환 고구마의 산화 및 건조 스트레스 내성 증가

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Title
Enhanced drought and oxidative stress tolerance in transgenic sweetpotato expressing a codA gene = CodA 고발현 형질전환 고구마의 산화 및 건조 스트레스 내성 증가
Author(s)
Sumg-Chul Park; M D Kim; Sun Ha Kim; Y H Kim; Jae Cheol Jeong; Haeng Soon Lee; Sang Soo Kwak
Bibliographic Citation
Journal of Plant Biotechnology, vol. 42, no. 1, pp. 19-24
Publication Year
2015
Abstract
Glycine betaine (GB) is one of the compatible solutes that accumulate in the chloroplasts of certain halotolerant plants under salt or cold stress. The codA gene for choline oxidase, the enzyme that converts choline into GB, has been cloned from a soil bacterium Arthrobacter globiformis. We generated transgenic sweetpotato plants [Ipomoea batatas (L.) Lam] expressing codA gene in chloroplasts under the control of the SWPA2 promoter (referred to as SC plants) and evaluated SC plants under oxidative and drought stresses. SC plants showed enhanced tolerance to methyl viologen (MV)-mediated oxidative stress and drought stress due to induced expression of codA. At 5 μM of MV treatment, all SC plants showed enhanced tolerance to MV-mediated oxidative stress through maintaining low ion leakage and increased GB levels compared to wild type plants. When plants were subjected to drought conditions, SC plants showed enhanced tolerance to drought stress through maintaining high relative water contents and increased codA expression compared to wild type plants. These results suggest that the SC plants generated in this study will be useful for enhanced biomass production on global marginal lands.
Keyword
CodA geneDrought stressGlycine betaineOxidative stressSweetpotato
ISSN
1229-2818
Publisher
Korea Soc-Assoc-Inst
DOI
http://dx.doi.org/10.5010/JPB.2015.42.1.19
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > Biological Resource Center > 1. Journal Articles
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