Technical Bulletin No. 0565: Diagnosis of Sequential Ozone Effects on Carbon Assimilation, Translocation, and Allocation in Cottonwood and Loblolly Pine
The utility of carbon-ll tracer techniques in air quality/forest health research was demonstrated in experiments conducted at the Duke University Phytron in Durham, North Carolina. Effects of ozone on carbon gain and allocation in loblolly pine seedlings were successfully determined by tracing 11CO2 taken into ozone-exposed and control seedlings. Ozone exposed loblolly pine seedlings received 120 ppb ozone (7 hours per day, 5 days per week) for 12 weeks while control seedlings received charcoal-filtered air.