Record Display for the EPA National Library Catalog


Main Title Plant Protective Response to Enhanced UV-B Radiation under Field Conditions: Leaf Optical Properties and Photosynthesis.
Author Flint, S. D. ; Jordan, P. W. ; Caldwell, M. M. ;
CORP Author Utah State Univ., Logan.;Corvallis Environmental Research Lab., OR.
Year Published 1985
Report Number EPA/600/J-85/467;
Stock Number PB87-169652
Additional Subjects Leaves(Botany) ; Ultraviolet radiation ; Plant growth ; Damage assessment ; Plant tissues ; Flavones ; Response ; Photosynthesis ; Epidermis ; Reprints ; Vicia faba
Library Call Number Additional Info Location Last
NTIS  PB87-169652 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 7p
Plants of Vicia faba were grown in the field during the early to midsummer while receiving two levels of supplemental UV-B radiation. Light-saturated photosynthesis and stomatal diffusive conductance of intact leaves did not show any indications of UV-radiation damage. Supplemental UV treatment did cause increased concentrations of UV-absorbing flavoid pigments in leaf tissues and decreased epidermal transmittance of UV radiation. While epidermal transmittance was reduced 30% under the low-UV treatment, the high-UV treatment failed to elicit as large a change. However, total amounts of flavonoids in other leaf tissues did increase in response to the high-UV treatment (up to 12% greater per unit leaf area than for control plants). This may have been a major factor protecting underlying photosynthetic tissues. (Copyright (c) 1985 Pergamon Press Ltd.)