Dr. John S. Choinski, Jr.
Professor of Biology
University of Central Arkansas
Conway, AR 72035
Telephone: (501) 450-5918
Fax: (501) 450-5914
E-mail: johnc@uca.edu
That's me, giving a botany lesson to my son, Reed. We are hiking a trail that winds around the ghost town of Rush, Arkansas.
My wife, Susan, looking up at a giant Sequoia in Yosemite this past summer. Now that's a big tree!
Courses
Principles of Biology I (Biology 1440)
Principles of Biology II (Biology 1441)
Economic Botany (Biology 3390)
Plant Ecophysiology (Biology 4450/5450)
Current Research
I have been investigating tree species that produce red (anthocyanin-containing) leaves in the spring. Over the past ten years, I have looked at numerous trees that show this phenomenon including the southern African tree, Brachystegia spiciformis; Corymbia gummifera, a Eucalypt found in coastal forests in southern Australia; and Quercus marilandica and Rhus glabra both found in the southeastern U.S. My focus has been on events occurring during leaf development and I have investigated leaf morphology, photosynthetic pigments, gas exchange, fluorescence and leaf temperature. My fundamental question has been, "What are the impacts of anthocyanins on the photosynthetic process?"
Quercus marilandica
Corymbia gummifera
Rhus glabra
Personal Links
Dr. Duke's Phytochemical and Ethnobotanical Database
Denver Broncos Official Website
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