Record Display for the EPA National Library Catalog


Main Title Field Study of the Interaction between Solar Ultraviolet-B Radiation and Drought on Photosynthesis and Growth in Soybean.
Author Sullivan, J. H. ; Teramura, A. H. ;
CORP Author Maryland Univ., College Park. Dept. of Botany.;Corvallis Environmental Research Lab., OR.
Publisher c1990
Year Published 1990
Report Number SCIENTIFIC-8044 ;CONTRIBA-4997; EPA-R-812150-02-0; EPA/600/J-90/490;
Stock Number PB91-196295
Additional Subjects Ultraviolet rays ; Photosynthesis ; Soybeans ; Droughts ; Farm crops ; Field tests ; Precipitation ; Plant growth ; Reprints ; Plant stress
Library Call Number Additional Info Location Last
NTIS  PB91-196295 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
Soybean, Glycine max (L.) Merr. cv Essex, plants were grown in the field in a 2x2 factorial design, under ambient and supplemental levels of ultraviolet-B (UV-B) radiation (supplemental daily dose of 5.1 effective kilojoules per square meter) and were either well-watered or subjected to drought. Soil water potentials were reduced to -2.0 megapascals by the exclusion of natural precipitation in the drought plots and were maintained at approximately -0.5 megapascal by supplemental irrigation in well-watered plots. Plant growth and gas exchange characteristics were affected under both drought and supplemental UV-B radiation. The combined effect of both drought and UV-B radiation on photosynthetic gas exchange was a reduction in apparent quantum efficiency and the rapid appearance of biochemical limitations to photosynthesis concomitant with reduced diffusional limitations. However, the combination of stresses did not result in additive effects on total plant growth or seed yield compared to reductions under either stress independently.