Influence of temperature and relative humidity on the response of white ash to ozone

Journal Article · Thu Jan 01 04:00:00 EST 1970 · Phytopathology; (United States)

OSTI ID:5194891

Wilhour, R G

White ash (Fraximus americana) seedlings were reared in a growth chamber at constant 27 C, 80% relative humidity (RH), and 2200 ft-c for a 12-hr photoperiod. All combinations of pre-, during, and post-fumigation temp of 16 and 27 C and relative humidities of 65 and 85% were used to determine the influence of these factors on seedling response to 25 pphm ozone. The pre-, during, and post-fumigation treatment periods were 2-3 weeks, 4 hr, and 4 days, respectively. A pre- and post-fumigation temp of 27 C and a fumigation of 16 C resulted in the greatest injury. The response was similar for seedlings 4, 6, and 10 weeks of age. Pre-, during, and postfumigation relative humidity regimes of 85% resulted in the most severe injury on plants 4, 12, and 14 weeks of age. The influence of RH was greatest on the youngest plants.

• Research Organization: Pennsylvania State Univ., University Park
• OSTI ID: 5194891
• Journal Information: Phytopathology; (United States), Journal Name: Phytopathology; (United States) Vol. 60; ISSN PHYTA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AGE DEPENDENCE
BIOLOGICAL EFFECTS
DOSE-RESPONSE RELATIONSHIPS
HUMIDITY
OZONE
PLANTS
RESPONSE MODIFYING FACTORS
SEEDLINGS
TEMPERATURE EFFECTS
TREES