Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Potential Impacts of Increased Solar UV-B on Global Plant Productivity.
Author Teramura, A. H. ; Sullivan., J. H. ;
CORP Author Maryland Univ., College Park. Dept. of Botany.;Corvallis Environmental Research Lab., OR.
Publisher 1990
Year Published 1990
Report Number EPA/600/A-92/103;
Stock Number PB92-180223
Additional Subjects Plant growth ; Solar ultraviolet radiation ; Biological radiation effects ; Environmental effects ; Forests ; Plant morphology ; Biochemistry ; Ozone depletion ; Photosynthesis ; Air pollution ; Global warming ; Dose-response relationships ; Lyman beta radiation ; Crop production ; Vegetation ; Greenhouse effects ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB92-180223 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/22/1992
Collation 12p
Depletion of the ozone layer is of concern because the stratospheric ozone column is the primary attenuator of solar ultraviolet-B radiation (UV-B region, between 290 and 320 nm). A decrease in this ozone column would lead to increases in UV-B reaching the earth's surface. Ultraviolet-B radiation comprises only a small portion of the electromagnetic spectrum but has a disproportionately large photobiological effect. Both plants and animals are greatly affected by increases in UV-B radiation but there exists tremendous variability in the sensitivity of plant species to UV-B radiation. Approximately two out of three species tested appear sensitive and sensitivity also differs among cultivars of the same species. Plants have developed natural adaptations such as anatomical, morphological and biochemical changes which protect them from UV-B radiation. The extent of these natural adaptations may be related to the geographic origin of the species. It has been hypothesized that species originating from areas which receive high levels of UV-B radiation would be highly resistant to UV-B radiation. Plants collected along a 3000 m elevational gradient in Hawaii showed differences in sensitivity which were correlated with elevation. Most plants native to low elevations were sensitive to UV-B, but plants from the higher elevations, where UV-B is greatest, were very tolerant to UV-B radiation.