||Influence of Floral Optical Properties on the Ultraviolet Radiation Environment of Pollen.
Flint, S. D. ;
Caldwell, M. M. ;
||Utah State Univ., Logan.;Corvallis Environmental Research Lab., OR.
Solar radiation ;
Ultraviolet spectra ;
Optical properties ;
Damage assessments ;
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Pollen in unopened flowers of most species is totally screened from solar ultraviolet-B radiation by imbricated petals that are largely opaque to UV-B. Following flower opening but before another dehiscence, the anther walls of the species investigated filter out over 98% of the UV-B radiation. Reflectance of UV from corollas of open flowers does not generally appear to add significantly to the solar UV-B radiation environment of pollen.