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OLS Field Name OLS Field Data
Main Title Effects of Supplemental Ultraviolet-B Radiation on the Growth and Physiology of Field-Grown Soybean.
Author Murali, N. S. ; Teramura, A. H. ;
CORP Author Maryland Univ., College Park. Dept. of Botany.;Corvallis Environmental Research Lab., OR.
Year Published 1986
Report Number EPA-R-808035; EPA/600/J-86/378;
Stock Number PB87-212866
Additional Subjects Ultraviolet radiation ; Plant growth ; Soybean plants ; Plant physiology ; Ozone ; Reduction ; Summer ; Leaves(Botany) ; Carbon dioxide ; Transpiration ; Sensitivity ; Plant reproduction ; Tests ; Reprints ;
Holdings
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Status
NTIS  PB87-212866 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 12p
Abstract
Soybeans were grown outdoors in field plots during 1983 and 1984 under ambient and 2 supplemental levels of biologically effective ultraviolet-B (UV-B) radiation (daily supplemental dose: 3.0 or 5.1 effective. These correspond to a 16 and 25% ozone reduction during clear sky conditions on the summer solstice. In 1983, neither cultivar showed any significant differences in growth, CO2 assimilation, transpiration, stomatal conductance nor leaf water potential under enhanced levels of UV-B irradiation. By contrast in 1984, during late vegetative and early reproductive stages of development, leaf area and CO2 assimilation in Essex were significantly reduced while stomatal conductance was increased by UV-B irradiation. The study illustrates that the effectiveness of enhanced levels of UV-B radiation is related to several factors, including microclimatic conditions prevailing during the growing season, cultivar, and the stage of plant development.