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Plant and Cell Physiology Advance Access published online on September 6, 2008
Plant and Cell Physiology, doi:10.1093/pcp/pcn115
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© The Author 2008. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

Polyamine biosynthesis regulated by StARD expression plays an important role in potato wound periderm formation

Jae Hyun Kim1,2, Hyun Soon Kim1, Yong Hwa Lee1, Yoon Sik Kim1, Hyun Woo Oh3, Hyouk Joung1, Suhn Kee Chae2, Kyong Hoon Suh2 and Jae Heung Jeon1,*

1Plant Genome Research Center, KRIBB, Daejeon 305-806, Korea
2Departments of Life Science & Technology, Paichai Univ., Daejeon 302-735, Korea
3Insect Resources Research Center, KRIBB, Daejeon 305-806, Korea

*Corresponding author: Dr. Jae Heung Jeon, Oun 52, Yuseong, Daejeon 305-806, Korea, Plant Genome Research Center, KRIBB, Tel: 82-42-860-4492; Fax: 82-42-860-4599, E-mail: jeonjh{at}kribb.re.kr


  Abstract

An acireductone dioxygenase (ARD) gene of potatoes was isolated from the ESTs of potato post-suberization cDNA libraries. The highest expression levels of the StARD gene and the protein appeared 36 h after suberization. An approximate nine-fold increase in ARD activity was detected at 36 h after wounding. Real-time RT-PCR analysis and immunolocalization studies revealed that StARD transcripts increase at the wound surface of potato tubers. The polyamine (PA) contents increased significantly after wounding at the wound surface. The increased PA content and ARD activity may play an important role in wound periderm formation.

Keywords: ARD - methionine salvage - polyamine - potato - suberization

(Received June 10, 2008; Accepted August 10, 2008)
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