Superoxide anion regulates plant growth and tuber development of potato

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Title
Superoxide anion regulates plant growth and tuber development of potato
Author(s)
Mi Sun Kim; Hyun Soon Kim; Yoon Shik Kim; K H Baek; Hyun Woo Oh; K W Hahn; R N Bae; I J Lee; Hyouk Joung; Jae Heung Jeon
Bibliographic Citation
Plant Cell Reports, vol. 26, no. 10, pp. 1717-1725
Publication Year
2007
Abstract
A higher concentration of H2O2 was detected in the sense transgenic potato plant (SS4) with the lily chCu,ZnSOD sequence, whereas higher levels of O 2- was detected in the antisense transgenic plant (SA1) than the WT plant. The elongation growth in SA1 was significantly inhibited by treatment with diphenyleneiodonium, an inhibitor of O 2- generation, and promoted in the SS4 on treatment with herbicide methyl viologen, a generator of apoplastic O 2- . Higher concentrations of GAs were detected during plant growth and the early stage of tuberization in SA1. Complete recovery of the above elongation growth and microtuberization pattern in transgenic plants following treatment of GA3 or an inhibitor of gibberellin synthesis, paclobutrazol, indicate that these changes were mainly caused by active GA levels. In conclusion, a specific ROS (O 2- ) acts as a signal transducer via GA biosynthetic pathways for the regulation of plant growth and tuber development of potato.
Keyword
CugibberellinROSsolanum tuberosumtuberizationZn-superoxide dismutase
ISSN
0721-7714
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s00299-007-0380-1
Type
Article
Appears in Collections:
Division of Research on National Challenges > Plant Systems Engineering Research > 1. Journal Articles
Division of Bio Technology Innovation > Core Research Facility & Analysis Center > 1. Journal Articles
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