Effects of ozone, sulfur dioxide and nitrogen oxides on the growth of eastern white pine. [Pinus strobus L]
Eight clones of eastern white pine (Pinus strobus L.) with predetermined sensitivity to air pollution were fumigated with 5 pphm and 10 pphm ozone (O/sub 3/), sulfur dioxide (SO/sub 2/), and nitrogen oxides (NO/sub x) singly, and in combination for 4h/day for 35 consecutive days. During the fumigation period, needle length, visible symptoms, and dry wt. were evaluated weekly. The carbon dioxide (CO/sub 2/) exchange rate was measured during the 10 pphm O/sub 3/ and 10 pphm SO/sub 2/ fumigation for 4h/day for 7 consecutive days. Needle length was not significantly different among different clones and treatments, whereas, there was a correlation between needle dry wt. (mg/mm of fascicle) and air pollution injury. Ten pphm O/sub 3/ and 10 pphm SO/sub 2/ slightly decreased CO/sub 2/ exchange rate during the first 1h of fumigation. Recovery phenomenon occurred after the end of each day's 4h fumigation. There was a trend of continuous decrease in relative CO/sub 2/ exchange rates over the 7 day period, however.
- Research Organization:
- Virginia Tech., Blacksburg, VA
- OSTI ID:
- 5651239
- Journal Information:
- Phytopathology; (United States), Vol. 70:7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of Lophodermium pinastri and Pullularia pollulans on healthy and ozone-injured needles of Pinus strobus
Effects of Lophodermium pinastri and Pullalaria pullulans on healthy and ozone-injured needles of Pinus strobus
Related Subjects
NITROGEN OXIDES
TOXICITY
OZONE
PINES
PLANT GROWTH
SENSITIVITY
SULFUR DIOXIDE
AIR POLLUTION
BIOLOGICAL RECOVERY
CARBON DIOXIDE
DOSE-RESPONSE RELATIONSHIPS
RESPIRATION
SYNERGISM
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CONIFERS
GROWTH
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANTS
POLLUTION
RECOVERY
SULFUR COMPOUNDS
SULFUR OXIDES
TREES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)