Influence of relative humidity and temperature on the response of pinto bean to acute exposures of sulfur dioxide

Journal Article · Wed Dec 31 23:00:00 EST 1975 · Proc Am Phytopathol Soc; (United States)

OSTI ID:6238082

Rist, D; Davis, D D

Thirteen-day old bean plants (Phaseolus vulgaris L. cv. Pinto 111) were exposed to 0.9 ppm (2395 ..mu..g/m/sup 3/) SO/sub 2/ for 1, 2, 3, or 4 hrs in a controlled environment chamber. In an initial study plants were exposed to the pollutant at 13, 21, or 32 C with a constant RH of 75%. In a second study, plants were exposed to SO/sub 2/ at 40, 60, or 80% RH with a constant temperature of 21 C. Four days following exposure, the percentage injured leaf tissue was visually estimated on the primary and first two trifoliolate leaves. The latter were 3-10 times more sensitive to SO2 than the primaries. Each injury mean presented here represents only the trifoliolate response, of 30 plants except where noted. Plants exposed to SO/sub 2/ for 4 hours at 40% RH or 4 hrs at 60% RH had mean injury ratings of 4 and 15%, respectively. Injury to plants exposed for 1, 2, 3, or 4 hrs at 80% RH averaged 0, 5, 40, 55% respectively, Injury means from SO/sub 2/ exposures of 20 plants each for 1, 2, 3, or 4 hours at 13 C were 10, 25, 30, and 40%, respectively. Leaves from plants exposed for 1, 2, 3, or 4 hours at 21 C exhibited mean injury ratings of 0, 9, 35, and 60%, in that order. Respective injury means for plants exposed to SO/sub 2/ for 1, 2, 3, or 4 hrs at 32 C were 5, 55, 75, and 80%. Injury from SO/sub 2/ to pinto bean foliage apparently increases with increases in temperature and RH.

• Research Organization: Pennsylvania State Univ., University Park
• OSTI ID: 6238082
• Journal Information: Proc Am Phytopathol Soc; (United States), Journal Name: Proc Am Phytopathol Soc; (United States) Vol. 3
• 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.
AIR POLLUTION
BIOLOGICAL EFFECTS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
HUMIDITY
INJURIES
LEAVES
LEGUMINOSAE
OXIDES
OXYGEN COMPOUNDS
PHASEOLUS
PLANTS
POLLUTION
SENSITIVITY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TEMPERATURE EFFECTS
VARIATIONS