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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

Authors 

Sumg-Chul ParkM D KimSun Ha KimY H KimJae Cheol JeongHaeng Soon LeeSang Soo Kwak

Publisher 

Korea Society of Plant Biotechnology

Issue Date 

2015

Citation 

Journal of Plant Biotechnology, vol. 42, no. 1, pp. 19-24

Keywords 

CodA geneDrought stressGlycine betaineOxidative stressSweetpotato

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.

ISSN 

1229-2818

Link 

http://dx.doi.org/10.5010/JPB.2015.42.1.19

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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