Skip Navigation

Plant and Cell Physiology 2004 45(11):1557-1565; doi:10.1093/pcp/pch178
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Nagata, T.
Right arrow Articles by Kikuchi, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Nagata, T.
Right arrow Articles by Kikuchi, S.
Agricola
Right arrow Articles by Nagata, T.
Right arrow Articles by Kikuchi, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 2004 Oxford University Press

Radial Expansion of Root Cells and Elongation of Root Hairs of Arabidopsis thaliana Induced by Massive Doses of Gamma Irradiation

Toshifumi Nagata1,3, Setsuko Todoriki2 and Shoshi Kikuchi1

1 Department of Molecular Genetics, National Institute of Agrobiological Sciences, Kannondai 2-1-2, Tsukuba, Ibaraki, 305-8602 Japan
2 National Food Research Institute, Kannondai 2-1-12, Tsukuba, Ibaraki, 305-0856 Japan

Radial expansion of root cells and elongation of root hairs were induced within 3 d of a massive dose (3 kGy) of gamma irradiation to Arabidopsis thaliana. Because treatment with the antioxidant n-propyl gallate before irradiation suppressed these changes, gamma irradiation partially rescued the rhd2 mutant (defective in NADPH oxidase); the superoxide-generating reagent paraquat induced similar root morphogenesis. These responses appeared to be induced by the active oxygen species (AOS) generated by water radiolysis. Ethylene production was induced immediately after gamma irradiation and reached a steady level after about 2 h. Addition of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid partly induced a similar expansion of root cells and elongation of root hairs. Addition of an inhibitor of ethylene biosynthesis, aminoethoxyvinylglycine, before gamma irradiation completely suppressed the formation of abnormal structures. These results suggest that the AOS is involved in the root morphological changes through the ethylene biosynthesis induced by gamma irradiation in Arabidopsis.

3 Corresponding author: E-mail, nagatat{at}nias.affrc.go.jp; Fax, +81-298-38-7007.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant Physiol.Home page
C. Ashtamker, V. Kiss, M. Sagi, O. Davydov, and R. Fluhr
Diverse Subcellular Locations of Cryptogein-Induced Reactive Oxygen Species Production in Tobacco Bright Yellow-2 Cells
Plant Physiology, April 1, 2007; 143(4): 1817 - 1826.
[Abstract] [Full Text] [PDF]

Home page
 Plant Cell PhysiolHome page
K. Henmi, T. Demura, S. Tsuboi, H. Fukuda, M. Iwabuchi, and K. Ogawa
Change in the Redox State of Glutathione Regulates Differentiation of Tracheary Elements in Zinnia Cells and Arabidopsis Roots
Plant Cell Physiol., November 1, 2005; 46(11): 1757 - 1765.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.