Laboratory class exercise - Air pollutant ozone and its effects on plants
This laboratory covers how ozone is formed in the atmosphere and how it affects crop plants. Students learn to recognize visible ozone injury and measure ozone effects on photosynthesis, biomass production and yield using the ozone-sensitive and ozone-resistant bean lines. Students then construct a data set from their observations and write a laboratory report.
Results from laboratories conducted for five classes over the past four years are shown below.
Chambers used to treat snap bean plants with ozone in the Phytotron.
Plants are grown in the greenhouse for one month to establish healthy plants ready for ozone exposure treatments.
Guided by experienced instructors, students use gas-exchange measuring instruments to determine ozone treatment effects on snap bean plants.