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Degree Name

MS (Master of Science)



Date of Award


Committee Chair or Co-Chairs

Hugh A. Miller III

Committee Members

Carolyn M. Wetzel, Cecilia A. McIntosh


Searches for sequence similarity against a previously isolated and known ABA regulated partial geranium cDNA on GenBank and TIGR databases gave results indicating sequence similarities to both firefly luciferase and 4-coumarate:CoA Ligase (4-CL). To determine whether or not this geranium cDNA, and a root mRNA from Arabidopsis that hybridized with the geranium cDNA, is 4-CL, specific Arabidopsis 4-CL primers were used for expression analysis by RT-PCR of Arabidopsis 4-CL mRNA from Arabidopsis root tissue. The expression pattern of the Arabidopsis 4-CL mRNA was identical with the expression pattern of the mRNA that hybridized with the geranium cDNA. This matching expression pattern gives very strong evidence that our geranium cDNA is 4-CL like and that Arabidopsis 4-CL is downregulated during water stress by ABA. This is significant in that it has not previously been reported. Northern analysis and PCR product sequence analysis further confirmed this expression data.

Document Type

Thesis - restricted


Copyright by the authors.