Ozone suppression of oat crown rust uredia development

Journal Article · Wed Jan 01 04:00:00 EST 1969 · Phytopathology; (United States)

OSTI ID:5937895

Heagle, A S

First foliage leaves of 10-day-old crown rust differential varieties of Avena sativa were inoculated with urediospores of race 264 of Puccinia coronata var. avenae and placed for 16 hr in a mist chamber at 23 C. Infected plants were then placed in two separate chambers at 25C, 80% relative humidity, 3000 ft-c, and a 16-hr photoperiod. Plants in one chamber were exposed to 10 pphm ozone (KI corrected Mast value) for 6 hr daily in the light for 10 days. Plants in the other chamber were not exposed to ozone. Visible ozone injury was restricted to minor flecking. In several varieties, a slight reddening appeared on inoculated leaves near the end of the experiment. The reaction to rust on ozone-exposed plants of all varieties was resistant, whereas the reaction on nonexposed plants of all differentials except 8, 9, and 10 was susceptible. The level of ozone used in this experiment is often surpassed in rural areas near urban centers, indicating that air pollution can influence rust development in the field.

• Research Organization: National Air Pollution Control Administration, Cincinnati, OH
• OSTI ID: 5937895
• Journal Information: Phytopathology; (United States), Journal Name: Phytopathology; (United States) Vol. 59:8; ISSN PHYTA
• Country of Publication: United States
• Language: English

Related Subjects

560302* -- Chemicals Metabolism & Toxicology-- Microorganisms-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL EFFECTS
FUNGI
GROWTH
INHIBITION
OZONE
PLANT DISEASES
PLANT GROWTH
PLANTS
POLLUTION