Plant Physiol. Tips for Better Browsing
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Plant Physiology 79:1011-1014 (1985)
© 1985 American Society of Plant Biologists

This Article
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 Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Web of Science (13)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gaba, V.
Right arrow Articles by Black, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gaba, V.
Right arrow Articles by Black, M.
Agricola
Right arrow Articles by Gaba, V.
Right arrow Articles by Black, M.
Articles

Photocontrol of Hypocotyl Elongation in Light-Grown Cucumis sativus L. 1

Responses to Phytochrome Photostationary State and Fluence Rate

Victor Gaba2 and Michael Black

Department of Biology, Queen Elizabeth College, (University of London), Campden Hill Road, London W8 7AH, England

The effects of the calculated photostationary state of phytochrome ({varphi}c) and the photon fluence rate on the elongation growth of the hypocotyl of light-grown seedlings of Cucumis sativus L. are examined. Two threshold responses to {varphi}c are found at values of 0.06 and 0.43. At {varphi}c = 0.06, there is no response at any fluence rate. In the {varphi}c range 0.1 to 0.43, elongation growth does not respond to changes in {varphi}c. Above the second threshold ({varphi}c = 0.43), there is a strong response to changes in {varphi}c. At all values of {varphi}c at and above 0.1, there is a response to fluence rate. A linear relationship can be demonstrated between a factor comprised of the logarithm of phytochrome cycling rate (a fluence-rate-dependent process) and {varphi}c, and the growth response.

2 Present address: Department of Plant Genetics, Weizmann Institute of Science, Rehovot 76100, Israel.

1 Supported by the SERC and the Royal Society.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1985 by the American Society of Plant Biologists