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
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB87-169652 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
7p |
Abstract |
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.) |