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Effect of Mercury Vapor on Sugar Beets¹

ABSTRACT

Whole young sugar beets (Beta vulgaris L.) were exposed to air containing vapor of metallic mercury at vapor densities of 0.28 to 15.5 mg/m³ for periods of 1 to 12 hours. Exposures as brief as 1 houra t 2.15 mg/m³ and 5 hours at 0.28 mg/m³ produced visible damage to leaves. Sugar beet plants are more susceptible than animal tissue to visible injury from mercury vapor and rank high in susceptibility to injury among plant species. Sugar beet plants might be used as inexpensive monitors where mercury vapor may be a health hazard.

Key Words: metallic mercury vapor • toxic symptoms of plants • dosing levels • plants as monitors

¹ Contribution from the Department of Soils and Plant Nutrition, University of California, Berkeley 94720.

² Associate Professor of Soil Physics and Assistant Professor of Environmental Plant Physiology, respectively.

Received for publication October 16, 1973.