Ozone and infection of geranium flowers by Botrytis cinerea

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

OSTI ID:6166488

Manning, W J; Feder, W A; Perkins, I

Flowering plants of geranium cultivars were exposed to 0.2, 0.35, and 0.55 ppm ozone for 4-hr periods at 20/sup 0/C in a greenhouse fumigation chamber. Three fully-opened flower heads were sprayed with a spore suspension of Botrytis cinerea at 2000, 1000, or 500 spores/ml immediately before exposure to ozone began. Sterile distilled water was sprayed on noninoculated flower heads. All flowers were examined for evidence of infection 24 hr after the end of the ozone-exposure periods. All flower heads were then removed and placed in wet, loosely tied plastic bags and incubated at 20/sup 0/C for 72 hr, with examination at 24-hr intervals for evidence of infection. Ozone at 0.2 ppm did not injure the plants or prevent or inhibit flower infection by B. cinerea at all inoculum levels. Natural infection also occurred on some noninoculated flowers. Ozone at 0.35 ppm did not injure the plants or prevent infection, but did inhibit pathogenesis at the 500-spore/ml inoculum level and on noninoculated flowers. Ozone at 0.55 ppm caused moderate injury on all plants. Ozone at this level did not prevent infection, but did restrict pathogenesis on all inoculated and noninoculated flowers.

• Research Organization: Univ. of Massachusetts, Waltham
• OSTI ID: 6166488
• Journal Information: Phytopathology; (United States), Vol. 60
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
FUNGAL DISEASES
INHIBITION
OZONE
BIOLOGICAL EFFECTS
DOSE-RESPONSE RELATIONSHIPS
EXPOSURE CHAMBERS
FLOWERS
INJURIES
ORNAMENTAL PLANTS
DISEASES
INFECTIOUS DISEASES
PLANTS
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)