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Rebekah Rampey, Ph.D.

Professor and Chair of the Biology Department

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About Rebekah Rampey, Ph.D.

Present	Associate Professor and Chair of the Biology Department, Harding University ‐ Department of Biology
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Biology

Auxins are a class of phytohormones that influence virtually every aspect of plant development. Plants regulate auxin levels through complex interactions among de novo synthesis, degradation, influx, efflux, and conjugate synthesis and hydrolysis. A thorough knowledge of these pathways is key to understanding the roles of auxins in plants. In a collaborative effort with Dr. Bethany Zolman, an Associate Professor of Biology at the University of Missouri in St. Louis, we are using genetic approaches to better understand the function of certain proteins involved in auxin storage and metabolism in the model plant Arabidopsis thaliana. A forward genetic screen identified a mutant defective in auxin-conjugate response, J56. We have used next-generation sequencing to compare mutant and genomic sequences and several mutations were identified in J56. Students are working to identify the causative mutation for the J56 auxin phenotype using several approaches, including isolating mutant alleles for candidate genes, using PCR to assay homozygous J56 lines for segregation of each mutation, and using quantitative PCR to measure expression levels of the candidate genes.

2019 Harold Alexander Academic Advising Award
2016 Harding University Teacher Achievement Award
2015 Nomination for Harding University Teacher Achievement Award
2005 George J. Schroepfer, Jr. Award for Outstanding Ph.D. Thesis in Biochemistry and Cell Biology

Botany
Molecular Genetics Laboratory
Genetics

2000 - 2004	PhD, Rice University ‐ Biochemistry and Cell Biology
Institution Organization Student Type Student Title Degree Time Period to Options Currently enrolled Affiliate my profile with this Institution

rrampey@harding.edu

Auxin Input Pathway Disruptions Are Mitigated by Changes in Ausin ...

Plant Physiology (2014)

Gretchen M Spiess, Amanda Hausman, Peng Yu, Jerry D Cohen, et al.

Auxin is a phytohormone involved in cell elongation and division. Levels of indole-3-acetic acid (IAA), the primary auxin, are tightly ...

[Accepted Article Manuscript Version (Postprint)] Auxin Input Pathway Disruptions Are ...

Plant Physiology (2014)

Gretchen M. Spiess, Amanda Hausman, Peng Yu, Jerry D. Cohen, et al.

Auxin is a phytohormone involved in cell elongation and division. Levels of indole-3-acetic acid (IAA), the primary auxin, are tightly ...

Compensatory Mutations in Predicted Metal Transporters Modulate Auxin Conjugate Responsiveness ...

G3: Genes, Genomes, Genetics (2013)

Rebekah A Rampey, Megan T Baldridge, David C Farrow, Sarah N Bay, et al.

Levels of the phytohormone indole-3-acetic acid (IAA) can be altered by the formation and hydrolysis of IAA conjugates. The isolation ...

Multiple Facets of Arabidopsis Seedling Development REquire Indole-3-Butyric Acid-Derived Auxin

American Society of Plant Biologists (2011)

Lucia C Strader, Dorthea L Wheeler, Sarah E Christensen, John C Berens, et al.

Levels of auxin, which regulates both cell division and cell elongation in plant development, are controlled by synthesis, inactivation, transport, ...