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. 1980 Mar;65(3):483–488. doi: 10.1104/pp.65.3.483

Effects of Ultraviolet-B Irradiances on Soybean

II. INTERACTION BETWEEN ULTRAVIOLET-B AND PHOTOSYNTHETICALLY ACTIVE RADIATION ON NET PHOTOSYNTHESIS, DARK RESPIRATION, AND TRANSPIRATION 1

Alan H Teramura 1,2,2, R Hilton Biggs 1,2, Susan Kossuth 1,2
PMCID: PMC440360  PMID: 16661219

Abstract

Soybean plants (cv. Hardee) were grown from seed under four ultraviolet-B radiation flux densities and four photosynthetically active radiation levels in a factorial design. Net photosynthesis, dark respiration, and transpiration were measured after 2 and 6 weeks of exposure. Effects of ultraviolet-B radiation were dependent upon photosynthetically active radiation levels. Ultraviolet-B radiation adversely affected net photosynthesis at low photosynthetically active radiation levels, but had little consequence at levels normally saturating photosynthesis in the field. Ultraviolet-B radiation affected both stomatal and nonstomatal resistances to carbon dioxide under low levels of photosynthetically active radiation. The present study demonstrates interactions between ultraviolet-B and photosynthetically active radiation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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