Abstract:
:The effects of the calculated photostationary state of phytochrome (phi(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 phi(c) are found at values of 0.06 and 0.43. At phi(c) = 0.06, there is no response at any fluence rate. In the phi(c) range 0.1 to 0.43, elongation growth does not respond to changes in phi(c). Above the second threshold (phi(c) = 0.43), there is a strong response to changes in phi(c). At all values of phi(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 phi(c), and the growth response.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Gaba V,Black Mdoi
10.1104/pp.79.4.1011subject
Has Abstractpub_date
1985-12-01 00:00:00pages
1011-4issue
4eissn
0032-0889issn
1532-2548journal_volume
79pub_type
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