Date of Defense

Spring 4-21-1993


Biological Sciences

First Advisor

Elwood B. Ehrle, Biological Sciences

Second Advisor

Julie Wolin, Biological Sciences

Third Advisor

Larry Yarger, Biological Sciences


salinity, nutrients, deficiency


Metal toxicities are problematic in the environment. Both plans and animals can accumulate and suffer from excess metal concentrations. However, these metals are always present in some form and concentration, and cannot be eliminated. Some plants exhibit mechanisms which deal successfully with toxic levels of nutrients. For example, the yellow monkey flower plant (Mimulus guttatus) controls Cu tolerance genetically (Macnair, 1983; Baker and Walker, 1990). Common cattails (Typha latifolia) have been shown to accumulate large amounts of Cu with no toxicity symptoms (Taylor and Crowder, 1984). A practical approach is to determine lower thresholds at which symptoms of excess metal concentrations occur. Using this knowledge, negative consequences may be reduced.

Access Setting

Honors Thesis-Campus Only