A. Bruce Cahoon

A. Bruce CahoonBruce Cahoon

Buchanan Endowed Chair of Biology

E-mail: abc6c@uvawise.edu
Phone: 276.328.0201
Office: Science 137


  • Doctor of Philosophy (Biology), University of Virginia, Charlottesville, VA, 2001
  • Master of Science (Biology), Virginia Commonwealth University, Richmond VA, 1994
  • Bachelor of Science (Biology) Virginia Commonwealth University, Richmond, VA, 1991

Courses Taught

  • Principles of Biology
  • Genes and GMOs
  • Principles of Biology Laboratory
  • Introduction to Biological Diversity
  • Plant Cell Function
  • Local Flora

Research Interests

I am currently focused on two broad interests:  organelle gene expression and protist biodiversity in Appalachian freshwater systems

Organelle Gene Expression:  Chloroplasts and mitochondria are semi-autonomous organelles that were incorporated into pre-eukaryotic cells through a process
called endosymbiosis.  They have circular chromosomes with genes that are
organized and expressed in ways that are unique in the biological world.
This includes multiple post-transcriptional processing steps, including
trans-splicing, RNA editing, odd poly-cistronic gene groups, transcript
separation, poly-A degradation signaling, and others both discovered and

Protist Biodiversity in Appalachian Freshwater Systems:   There are numerous
natural and man-made freshwater ponds and waterways in the southern
Appalachian region yet there is very little exploration of the microscopic
eukaryotic organisms that are primary producers within these systems.
Beginning the summer of 2015 members of my lab began surveying lentic
(standing) areas in man-made ponds of various ages in our local area.  We are
initially using a metagenomic strategy to identify micro algae and
protozoans.  This is a relatively new focal area in my lab, but one that has
already begun to offer interesting insight into an unseen aspect of the
biological diversity in southern Appalachia.

Selected Publications

Bhawana, Jeannie Stubblefield*, Anthony Newsome, A. Bruce Cahoon (2015)
Surface decontamination of plant tissue explants with chlorine dioxide gas.
In Vitro Cellular and Developmental Biology – Plant 51:214-219

Bhawana, Joyce L. Miller, and A. Bruce Cahoon (2014) Visualization of
3-Dimensional Plant Cell Architecture in Different Tissues of Arabidopsis
thaliana with Focused Ion Beam-Scanning Electron Microscopy.  Applications in
Plant Science 2:6

Benjamin T. Grimes, Awa K. Sisay*, Hyrum D. Carroll, A. Bruce Cahoon (2014)
Deep Sequencing of the Tobacco Mitochondrial Transcriptome Reveals Expressed
ORFs and Numerous Editing Sites Outside Coding Regions.  BMC Genomics 15:31

Jacob B. Hall, Vincent A. Cobb, A.Bruce Cahoon. (2013) The complete
mitochondrial DNA sequence of Crotalus horridus (timber rattlesnake).
Mitochondrial DNA.  24:94-96

Sheri Mersch and A. Bruce Cahoon (2012) Ky31 tall fescue can outcompete MaxQ
through more efficient utilization of a hydrophilic compound produced by the
endophyte Neotyphodium coenophialum. Grass and Forage Science.  67:299-304

Abby M. Drumwright, Brian W. Allen, Krista A. Huff, Patricia A. Ritchey, A.
Bruce Cahoon.  (2011).  Survey and DNA Barcoding of Poaecea in Flat Rock
Cedar Glades and Barrens State Natural Area, Murfreesboro, TN.  Castanea

R.M. Sharpe, A. Mahajan*, E. Takacs, D. B. Stern, A. B. Cahoon (2011)
Developmental and cell type characterization of bundle sheath and mesophyll
chloroplast-encoded transcript abundance in maize.  Current Genetics

A. Bruce Cahoon, R. M. Sharpe, C. Mysayphonh, E. J. Thompson, A. D. Ward,
Anhua Lin (2010)  The Complete Chloroplast Genome of Tall Fescue (Lolium
arundinaceum, “Poaceae”) and the Comparison of Whole Plastomes from the
Family Poaceae.  American Journal of Botany 97: 49-58


Cahoon, Aubrey Bruce; Carroll, Hyrum; Wang, Matthew Yu-Wei; Newby, Robert J.;
Al-Tobasei, Rafet Faeq; Ewool, Richard C.; Evangelista, Delio; Stanley,
Conner D.; Leblond, Jeffrey. (2015) Production of a complete library of the
plastid derived transcipts of Karenia brevis and phylogenetic analysis of 6
proteins adds to the complex story of dinoflagellate endosymbiosis.
Botanical Society of America, Edmonton, AB

Cahoon , Aubrey Bruce; Grimes, Bejamin; Sisay, Awa; Carroll, Hyrum.
(2014) Deep sequencing of the tobacco mitochondrial transcriptome reveals
extensive processing, expressed ORFs, and numerous editing sites outside
coding regions.  Botanical Society of America. Boise, ID.

Cahoon , Aubrey Bruce; Bailey, Frank C. (2014) Increasing Student Success in
Biology Large Lecture Classes:  Notes From the Field.  Botanical Society of
America. Boise, ID.

Borer, Catherine; Cahoon, Aubrey Bruce; Miller, Joyce; Tate, Torri (2014)
Documentation of foliar surface features for calcium tolerance of Poliomintha
incana, from White Sands National Monument, an extremely high-calcium site

Bhawana*, J.L Miller, A. B. Cahoon. (2013)  Visualization of 3-Dimensional
Plant Cell Architecture with FIB-SEM.  Botanical Society of America.  New
Orleans, LA.

Bhawana*, J.L Miller, A. B. Cahoon. (2012)  Ultra-structural anatomy of
immature plastids using SEM, TEM, and FIB-SEM electron microscopy.  Botanical
Society of America.  Columbus, OH.

A. Bruce Cahoon (2011) Transcription and Transcript Processing in Maize
Chloroplasts.  Invited Seminar Speaker – Berry College.  Mt. Berry, GA.

Margaret Pitt*, Scott Gillespie*, Lisa Bloomer-Green & A. Bruce Cahoon (2011)
Quantitative Analysis of Plastid Intercistronic Transcript Linkage.    Cold
Spring Harbor conference on Eukaryotic mRNA Processing.

A. Bruce Cahoon, Abby Drumwright, Brian Allen, Patricia Ritchey, & Krista
Huff  (2011).  Survey and DNA Barcoding of Paecea in Flat Rock Cedar Glades
and Barrens State Natural Area, Murfreesboro, TN.  Botanical Society of
America Meeting.  St.Louis, MO.

A.Bruce Cahoon & Ben Grimes (2010) Impact of Temperature and Irradiance on
Glycerolipid Biosynthesis Genes in Chlamydomonas Reinhardtii.  Algae Biomass
Summit.  Phoenix, AZ.

A. Bruce Cahoon. (2010) Transcription and Transcript Processing in Maize
Chloroplasts.  Invited Seminar Speaker – East Tennessee State University.
Johnson City, TN.

A. Bruce Cahoon (2010) Plastome Sequencing in a University Level General
Genetics Lab.  Botanical Society of America Meeting, Providence RI.

A.Bruce Cahoon. (2010)  Sophomoric Genomics:  The Complete Chloroplast Genome
of Fescue.  Invited Seminar Speaker – Austin Peay State University.
Clarksville, TN.