NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Interactions of light and ethylene in hypocotyl hook maintenance in Arabidopsis thaliana seedlingsEtiolated seedlings frequently display a hypocotyl or epicotyl hook which opens on exposure to light. Etylene has been shown to be necessary for maintenance of the hook in a number of plants in darkness. We investigated the interaction of ethylene and light in the regulation of hypocotyl hook opening in Arabidopsis thaliana. We found that hooks of Arabidopsis open in response to continuous red, far-red or blue light in the presence of up to 100 microliters l-1 ethylene. Thus a change in sensitivity to ethylene is likely to be responsible for hook opening in Arabidopsis, rather than a decrease in ethylene production in hook tissues. We used photomorphogenic mutants of Arabidopsis to demonstrate the involvement of both blue light and phytochrome photosensory systems in light-induced hook opening in the presence of ethylene. In addition we used ethylene mutants and inhibitors of ethylene action to investigate the role of ethylene in hook maintenance in seedlings grown in light and darkness.
Document ID
20040088916
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Knee, E. M.
(The Ohio State University, Department of Plant Biotechnology Columbus 43210, United States)
Hangarter, R. P.
Knee, M.
Date Acquired
August 21, 2013
Publication Date
February 1, 2000
Publication Information
Publication: Physiologia plantarum
Volume: 108
Issue: 2
ISSN: 0031-9317
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-4730
CONTRACT_GRANT: IBN9-596186
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Plant Biology

Available Downloads

There are no available downloads for this record.
No Preview Available