Carbon Dioxide Uptake in Plants: A Computer-Aided Experimental System

 

Christopher J. Paradise and Richard J. Cyr

Tested Studies in Laboratory Teaching, 1995, Volume 16

Abstract

This exercise introduces students to concepts of photosynthesis at the whole organism level and to computer utilization in biology. Changes in carbon dioxide concentration are measured in environmental chambers using gas analyzers connected to computers. Carbon dioxide changes are graphed in real time as the plants take up CO₂. Over a short time, sunflower seedlings show dramatic changes in CO₂ uptake when light intensity is altered or color filters are used. Comparison of the resulting graphs will indicate treatment differences in the rate of carbon dioxide change. Modifying the basic experimental design allows this exercise to be used in a variety of courses.

Keywords:  photosynthesis, investigative learning, vascular plants, carbon dioxide, computer

Emory University (1994)