|
PLANT PHYSIOLOGY , Vol 112, Issue 3 879-888, Copyright © 1996 by American Society of Plant Biologists
|
WHOLE PLANT, ENVIRONMENTAL, AND STRESS PHYSIOLOGY |
Effects of Epidermal Cell Shape and Pigmentation on Optical Properties of Antirrhinum Petals at Visible and Ultraviolet Wavelengths
H. L. Gorton and T. C. Vogelmann
Department of Biology, St. Mary's College of Maryland, St. Mary's City, Maryland 20686 (H.L.G.)
We used the Mixta+ and mixta- lines of Antirrhinum majus as a model system
to investigate the effects of epidermal cell shape and pigmentation on
tissue optical properties in the visible and ultraviolet (UV) spectral
regions. Adaxial epidermal cells of Mixta+ flowers have a conical-papillate
shape; in the mixta- line the cells are slightly domed. Mixta+ cells
contained significantly more anthocyanin and other flavonoids than mixta-
cells when plants were grown under either high- or low-UV conditions.
Mixta+ cells focused light (3.5-4.7 times incident) within their pigmented
interiors, whereas mixta- cells focused light (2.1-2.7 times incident) in
the unpigmented mesophyll. UV light penetrated the epidermis (commonly
20-50% transmittance at 312 nm) mainly through the unpigmented peripheral
regions of the cells that were similar for the two lines, so that overall
penetration through Mixta+ and mixta- epidermises was equal. However,
maximum UV absorption in the central region of epidermal cells was slightly
greater in Mixta+ than mixta-, and intact Mixta+ flowers reflected less
light in the spectral regions with intermediate flavonoid absorbance. In
both cases, about 50 to 75% of the difference could be attributed to cell
shape and resulting changes in the optical pathlength or focusing.
This article has been cited by other articles:
|
|
|
|
 
C. R. Brodersen and T. C. Vogelmann
Do epidermal lens cells facilitate the absorptance of diffuse light?
Am. J. Botany,
July 1, 2007;
94(7):
1061 - 1066.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
K. Baumann, M. Perez-Rodriguez, D. Bradley, J. Venail, P. Bailey, H. Jin, R. Koes, K. Roberts, and C. Martin
Control of cell and petal morphogenesis by R2R3 MYB transcription factors
Development,
May 1, 2007;
134(9):
1691 - 1701.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
D. R. Luesse, S. L. DeBlasio, and R. P. Hangarter
Plastid Movement Impaired 2, a New Gene Involved in Normal Blue-Light-Induced Chloroplast Movements in Arabidopsis
Plant Physiology,
August 1, 2006;
141(4):
1328 - 1337.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
Q. C. B. Cronk
Legume flowers bear fruit.
PNAS,
March 28, 2006;
103(13):
4801 - 4802.
[Full Text]
[PDF]
|
|
|
|
|
|
|
G. Scalliet, C. Lionnet, M. Le Bechec, L. Dutron, J.-L. Magnard, S. Baudino, V. Bergougnoux, F. Jullien, P. Chambrier, P. Vergne, et al.
Role of Petal-Specific Orcinol O-Methyltransferases in the Evolution of Rose Scent
Plant Physiology,
January 1, 2006;
140(1):
18 - 29.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
N. Kolosova, D. Sherman, D. Karlson, and N. Dudareva
Cellular and Subcellular Localization of S-Adenosyl-L-Methionine:Benzoic Acid Carboxyl Methyltransferase, the Enzyme Responsible for Biosynthesis of the Volatile Ester Methylbenzoate in Snapdragon Flowers
Plant Physiology,
July 1, 2001;
126(3):
956 - 964.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
B. Glover, M Perez-Rodriguez, and C Martin
Development of several epidermal cell types can be specified by the same MYB-related plant transcription factor
Development,
January 9, 1998;
125(17):
3497 - 3508.
[Abstract]
[PDF]
|
|
|
|
|
