Effects of acute hydrogen fluoride and nitrogen dioxide exposures on citrus and ornamental plants of central Florida

Journal Article · Sat Jun 01 04:00:00 EDT 1968 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es60018a002· OSTI ID:6240160

MacLean, D C; McCune, D C; Weinstein, L H; Mandl, R H; Woodruff, G N

Six citrus varieties and six ornamental species of economic importance to central Florida were subjected to high concentration-short duration exposures of gaseous hydrogen fluoride (HF) or nitrogen dioxide (NO/sub 2/). Postfumigation observations showed that the effects of acute pollutant exposures differ markedly from those of chronic exposures. HF exposures of 0.5 to 10 ppm for periods of from 0.5 to 8 hours induced tip, marginal, and intercostal chlorosis and necrosis, and abscission of leaves of most plants tested. Symptoms were most severe on, but not limited to, young leaves. The effect of duration of exposure had a greater influence on abscission of young citrus leaves than did HF concentration. However, the effect of HF concentration on foliar F accumulation could not be separated from exposure time. The NO/sub 2/ concentrations used ranged from 25 to 250 ppm for periods of from 10 minutes to 8 hours. NO/sub 2/ damage was characterized by rapid tissue collapse, necrosis, and defoliation. Symptoms were sporadic in appearance, affecting leaves of all ages. The relative contributions of concentration and duration to NO/sub 2/-induced injury were about equal. 11 references, 4 figures, 4 tables.

• Research Organization: Boyce Thompson Institute for Plant Research, Yonkers, NY
• OSTI ID: 6240160
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 2:6; ISSN ESTHA
• 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.
ACUTE EXPOSURE
ATMOSPHERES
CHALCOGENIDES
CHRONIC EXPOSURE
CITRUS
COMPARATIVE EVALUATIONS
CONTROLLED ATMOSPHERES
DATA
DOSE-RESPONSE RELATIONSHIPS
ECOLOGICAL CONCENTRATION
ELEMENTS
EXPERIMENTAL DATA
FEDERAL REGION IV
FLORIDA
FLUORINE
HALOGENS
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INJURIES
INORGANIC ACIDS
LEAVES
NECROSIS
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
NONMETALS
NORTH AMERICA
NUMERICAL DATA
ORNAMENTAL PLANTS
OXIDES
OXYGEN COMPOUNDS
PATHOLOGICAL CHANGES
PLANTS
SENSITIVITY
SYMPTOMS
TOXICITY
USA