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Plant and Cell Physiology Advance Access originally published online on September 6, 2008
Plant and Cell Physiology 2008 49(10):1627-1632; 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 email: journals.permissions@oxfordjournals.org

Short Communication

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,*

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

*Corresponding author: E-mail, jeonjh{at}kribb.re.kr; Fax, +82-42-860-4599.


  Abstract

An acireductone dioxygenase (ARD) gene of potatoes was isolated from the expressed sequence tags (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 9-fold increase in ARD activity was detected at 36 h after wounding. Real-time reverse transcription–PCR (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

Abbreviations: ACO, aminocyclopropane-1-carboxylic acid (ACC) oxidase; ACS, ACC synthase; ARD, acireductone dioxygenase; ARGDC, arginine decarboxylase; BSA, bovine serum albumin; EST, expressed sequence tag; GST, glutathione S-transferase; HCAA, hydroxycinnamic acid amide; MTA, 5'-methylthioadenosine; PDOP, 1-phosphonooxy-2,2-dihydroxy-3-oxo-3-phenylpropane; Put, putrescine; PVDF, polyvinylidene fluoride; RT–PCR, reverse transcription–PCR; SAM, S-adenosyl-L-methionine; SAMDC, SAM decarboxylase Spd, spermidine; SPDS, spermidine synthase; Spm, spermine.

The nucleotide sequence reported in this paper has been submitted to the GenBank database under accession number EU127480.

(Received June 10, 2008; Accepted August 8, 2008)
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