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Light-induced, dark-reversible color shifts in petals of Phlox

Björn, G S; Braune, W and Björn, Lars Olof LU (1985) In Physiologia Plantarum 64(4). p.445-448
Abstract
Flowers of some Phlox (Phlox x paniculata L.) varieties undergo daily colour shifts, being blue in the early morning, turning red during the day, and returning to blue in the evening. The colour shift, which occurs only in the upper (adaxial) petal surfaces, is due to the daily changes in ambient light. In the laboratory, colour shifts could be induced by 2.5 h of ultraviolet, visible or far-red light and recorded by reflectance spectrophotometry.



There are indications that irradiations with different kinds of light cause qualitatively different colour shifts, and that thus more than one photoreceptor pigment and more than one primary light reaction may be involved. The presence of phytochrome was demonstrated in petals... (More)
Flowers of some Phlox (Phlox x paniculata L.) varieties undergo daily colour shifts, being blue in the early morning, turning red during the day, and returning to blue in the evening. The colour shift, which occurs only in the upper (adaxial) petal surfaces, is due to the daily changes in ambient light. In the laboratory, colour shifts could be induced by 2.5 h of ultraviolet, visible or far-red light and recorded by reflectance spectrophotometry.



There are indications that irradiations with different kinds of light cause qualitatively different colour shifts, and that thus more than one photoreceptor pigment and more than one primary light reaction may be involved. The presence of phytochrome was demonstrated in petals of white Phlox flowers by in vivo transmission spectrophotometry. It is therefore possible that colour shifts in coloured Phlox flowers are mediated by phytochrome. Possibly the movement of ions (e.g. hydrogen ions) into or out of the vacuole (where the visible pigments are located) is affected by light absorption in a pigment in the tonoplast. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physiologia Plantarum
volume
64
issue
4
pages
445 - 448
publisher
Wiley Online Library
ISSN
0031-9317
DOI
10.1111/j.1399-3054.1985.tb08520.x
language
English
LU publication?
yes
id
7e9a7635-d0e4-4ff0-9a46-45e8e5b9a4a3 (old id 134587)
date added to LUP
2007-07-30 11:44:30
date last changed
2016-04-16 03:58:06
@article{7e9a7635-d0e4-4ff0-9a46-45e8e5b9a4a3,
  abstract     = {Flowers of some Phlox (Phlox x paniculata L.) varieties undergo daily colour shifts, being blue in the early morning, turning red during the day, and returning to blue in the evening. The colour shift, which occurs only in the upper (adaxial) petal surfaces, is due to the daily changes in ambient light. In the laboratory, colour shifts could be induced by 2.5 h of ultraviolet, visible or far-red light and recorded by reflectance spectrophotometry.<br/><br>
<br/><br>
There are indications that irradiations with different kinds of light cause qualitatively different colour shifts, and that thus more than one photoreceptor pigment and more than one primary light reaction may be involved. The presence of phytochrome was demonstrated in petals of white Phlox flowers by in vivo transmission spectrophotometry. It is therefore possible that colour shifts in coloured Phlox flowers are mediated by phytochrome. Possibly the movement of ions (e.g. hydrogen ions) into or out of the vacuole (where the visible pigments are located) is affected by light absorption in a pigment in the tonoplast.},
  author       = {Björn, G S and Braune, W and Björn, Lars Olof},
  issn         = {0031-9317},
  language     = {eng},
  number       = {4},
  pages        = {445--448},
  publisher    = {Wiley Online Library},
  series       = {Physiologia Plantarum},
  title        = {Light-induced, dark-reversible color shifts in petals of Phlox},
  url          = {http://dx.doi.org/10.1111/j.1399-3054.1985.tb08520.x},
  volume       = {64},
  year         = {1985},
}