PT  - JOURNAL ARTICLE
AU  - W. David Hacker
AU  - Howard S. Neufeld
TI  - The False Positive in Bioindicators of Air Pollution
AID  - 10.48044/jauf.1992.048
DP  - 1992 Sep 01
TA  - Arboriculture &amp;amp; Urban Forestry (AUF)
PG  - 249--251
VI  - 18
IP  - 5
4099  - http://auf.isa-arbor.com/content/18/5/249.short
4100  - http://auf.isa-arbor.com/content/18/5/249.full
SO  - JOA1992 Sep 01; 18
AB  - Yellow-poplar (Lirodendron tulipifera) seedlings were fumigated with a gradient of ozone to determine what effect ozone has on the species. The fumigated seedlings displayed physical symptoms of ozone injury but a large number of the individuals from the charcoal-filtered treatment showed physical symptoms of ozone when indeed no ozone was present. This is an indication that what appears to be ozone damage on yellow-poplar may not be caused by ozone.