Leaf diffusion resistance responses of three petunia cultivars to ozone and/or sulfur dioxide

Journal Article · Fri Jun 01 04:00:00 EDT 1979 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1979.10470833· OSTI ID:5843002

Elkiey, T; Ormrod, D P

The response of stomata to O/sub 3/ and/or SO/sub 2/ in two humidity regimes was evaluated in terms of leaf diffusion resistance (LDR) of petunia (Petunia hybrida Vilm.) plants of three cultivars of differing O/sub 3/ sensitivity. At about 50% relative humidity, exposure to O/sub 3/ or O/sub 3/ and SO/sub 2/ resulted in rapid increases in LDR with the fastest response in the mixture. There were only slight increases in LDR with O/sub 3/ or O/sub 3/ and SO/sub 2/ exposure at about 90% relative humidity and there were only slight effects of SO/sub 2/ alone on LDR at either 50% or 90% relative humidity. The LDR of the sensitive cultivar 'While Cascade' increased most rapidly in O/sub 3/ alone and the least sensitive 'Capri' most rapidly in the O/sub 3/ and SO/sub 2/ mixture but the maximum LDR reached with continued exposure was similar for all cultivars.

• Research Organization: Univ. of Guelph, Canada
• OSTI ID: 5843002
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 29:6; ISSN JPCAA
• 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.
BIOLOGICAL EFFECTS
CHALCOGENIDES
DATA
DATA COMPILATION
DATA FORMS
DISPERSIONS
HUMIDITY
INFORMATION
LEAVES
MIXTURES
NUMERICAL DATA
OPENINGS
OXIDES
OXYGEN COMPOUNDS
OZONE
STOMATA
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TABLES
TIME DEPENDENCE