Growth and tuberization of transgenic potato plants expressing sense and antisense sequences of Cu/Zn superoxide dismutase from lily chloroplasts

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Title
Growth and tuberization of transgenic potato plants expressing sense and antisense sequences of Cu/Zn superoxide dismutase from lily chloroplasts
Author(s)
Mi Sun Kim; Hyun Soon Kim; H N Kim; Yoon Shik Kim; K H Baek; Y I Park; Hyouk Joung; Jae Heung Jeon
Bibliographic Citation
Journal of Plant Biology, vol. 50, no. 4, pp. 490-495
Publication Year
2007
Abstract
Overexpression of a chloroplast-localized Cu/Zn superoxide dismutase (chCu/ZnSOD) obtained from lily significantly affects the growth and shape of potato tubers from an in vitro culture system (Kim et al., 2007). Here, we further characterized the sense and antisense transgenic potatoes grown and pots and the greenhouse to investigate the potential for more practical field applications of such phenotypic manipulations. Under in vitro conditions, antisense transgenic plants showed increased shoot growth, delayed tuberization, and altered tuber shapes. When antisense plants were treated with paclobutrazol, an inhibitor of GA biosynthesis, tuberization efficiency and tuber shape were recovered to a status very similar to that of in vitro-grown wild-type plants. Our results strongly support the idea that potato tuberization and shape is mediated by SOD-catalyzed reactive oxygen species, possibly via the GA biosynthesis pathway.
Keyword
antisenseCu/Zn superoxide dismutasegibberellinsensesolanum tuberosumtuberization
ISSN
I000-0094
Publisher
Springer
DOI
http://dx.doi.org/10.1007/BF03030688
Type
Article
Appears in Collections:
Division of Research on National Challenges > Plant Systems Engineering Research > 1. Journal Articles
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