Expression of Arabidopsis NDPK2 increases antioxidant enzyme activities and enhances tolerance to multiple environmental stresses in transgenic sweetpotato plants

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Title
Expression of Arabidopsis NDPK2 increases antioxidant enzyme activities and enhances tolerance to multiple environmental stresses in transgenic sweetpotato plants
Author(s)
Yun Hee Kim; S Lim; K S Yang; Cha Young KimSuk Yoon Kwon; Haeng Soon Lee; X Wang; Z Zhou; D Ma; D J Yun; Sang Soo Kwak
Bibliographic Citation
Molecular Breeding, vol. 24, no. 3, pp. 233-244
Publication Year
2009
Abstract
Transgenic sweetpotato (Ipomoea batatas L. cv. Yulmi) plants expressing the Arabidopsis nucleoside diphosphate kinase 2 (AtNDPK2) gene under the control of an oxidative stress-inducible peroxidase (SWPA2) promoter (referred to as SN plants) were developed and evaluated for enhanced tolerance of SN plants under various abiotic stress conditions. The level of AtNDPK2 expression and NDPK activity in SN plants following methyl viologen (MV) treatment was positively correlated with the plant's tolerance to MV. Interestingly, we observed that antioxidant enzyme activities such as peroxidase, ascorbate peroxidase, and catalase increased in MV-treated SN plants. In addition, SN plants showed enhanced tolerance to cold, high salinity, and drought stresses by an increase in the activity of H2O2 scavenging enzymes. These results indicate that overexpression of AtNDPK2 in sweetpotato might efficiently modulate oxidative stress from various environmental stresses.
Keyword
H2O2 scavenging enzymeNucleoside diphosphate kinase 2Oxidative stressPeroxidase promoterSweetpotato
ISSN
1380-3743
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s11032-009-9286-7
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > 1. Journal Articles
Division of Biomaterials Research > 1. Journal Articles
Division of Biomaterials Research > Plant Systems Engineering Research > 1. Journal Articles
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