Enhanced tolerance of transgenic potato plants expressing both superoxide dismutase and ascorbate peroxidase in chloroplasts against oxidative stress and high temperature

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Title
Enhanced tolerance of transgenic potato plants expressing both superoxide dismutase and ascorbate peroxidase in chloroplasts against oxidative stress and high temperature
Author(s)
L Tang; Suk Yoon Kwon; Sun Hyung Kim; J S Kim; J S Choi; K Y Cho; C K Sung; Sang Soo Kwak; Haeng Soon Lee
Bibliographic Citation
Plant Cell Reports, vol. 25, no. 12, pp. 1380-1386
Publication Year
2006
Abstract
Oxidative stress is a major damaging factor for plants exposed to environmental stresses. In order to develop transgenic potato plants with enhanced tolerance to environmental stress, the genes of both Cu/Zn superoxide dismutase and ascorbate peroxidase were expressed in chloroplasts under the control of an oxidative stress-inducible SWPA2 promoter (referred to as SSA plants). SSA plants showed enhanced tolerance to 250 μM methyl viologen, and visible damage in SSA plants was one-fourth that of non-transgenic (NT) plants that were almost destroyed. In addition, when SSA plants were treated with a high temperature of 42°C for 20 h, the photosynthetic activity of SSA plants decreased by only 6%, whereas that of NT plants decreased by 29%. These results suggest that the manipulation of the antioxidative mechanism of the chloroplasts may be applied in the development of industrial transgenic crop plants with increased tolerance to multiple environmental stresses.
Keyword
Antioxidant enzymeEnvironmental stressMolecular breedingPotatoTransgenic plant
ISSN
0721-7714
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s00299-006-0199-1
Type
Article
Appears in Collections:
Division of Biomaterials Research > 1. Journal Articles
Division of Biomaterials Research > Plant Systems Engineering Research > 1. Journal Articles
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