| Main Title |
Leaf UV Optical Properties of 'Rumex patientia' L. and 'Rumex obtusifolius L. in Regard to a Protective Mechanism against Solar UV-B Radiation Injury. |
| Author |
Robberecht, R. ;
Caldwell, M. M. ;
|
| CORP Author |
Utah State Univ., Logan. ;Idaho Univ., Moscow.;Corvallis Environmental Research Lab., OR. |
| Year Published |
1987 |
| Report Number |
EPA/600/D-87/008; |
| Stock Number |
PB87-147112 |
| Additional Subjects |
Solar ultraviolet radiation ;
Leaves(Botany) ;
Plant genetics ;
Optical properties ;
Photsynthesis ;
Germination ;
Plant physiology ;
Sensitivity ;
Absorbtance ;
Rumex patentia L ;
Rumex obtusifolius L ;
Protective mechanism
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB87-147112 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
13p |
| Abstract |
Effective UV attenuation in the outer leaf layers may represent an important protective mechanism against potentially damaging solar UV-B radiation. Epidermal optical properties for Rumex patientia and Rumex obtusifolius were examined on field collected and greenhouse grown plants. Rumex patientia, a relatively UV-B sensitive plant, has substantially higher epidermal UV transmittance than Rumex obtusifolius, which indicated that the UV-B flux at the mesophyll layer for Rumex obtusifolius by 27% after exposure to solar UV-B radiation. Flavonoid extract absorbance also increased in whole leaves of both species after solar UV-B radiation. The epidermis is not only an effective filter for UV-B radiation, but is wavelength selective, and shows a degree of plasticity in this attenuation. |
| Supplementary Notes |
Prepared in cooperation with Idaho Univ., Moscow. Sponsored by Corvallis Environmental Research Lab., OR. |
| PUB Date Free Form |
Jan 87 |
| Category Codes |
57C; 57V; 98D |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
709319422 |
| Origin |
NTIS |
| Type |
CAT |
