Combined effects of peroxyacetyl nitrate and ozone on growth of four tomato cultivars. [Lycopersicon spp]

Journal Article · · J. Environ. Qual.; (United States)

OSTI ID:5148186

Temple, P J; Taylor, O C

In a greenhouse exposure chamber study to determine the combined effects of peroxyacetyl nitrate (PAN) and ozone (O/sub 3/) on foliar injury and growth of four cultivars of tomato (Lycopersicon spp.), 4-week-old plants were exposed to 0, 125, and 250 ..mu..g m/sup -3/ PAN and 0, 200, and 400 ..mu..g m/sup -3/ O/sub 3/, and all combinations, 4 h/d, once per week for 3 weeks. Plants were harvested 1 week after the last exposure. The experiment was repeated twice. Ozone induced trace (ca. 1%) foliar injury at 200 ..mu..g m/sup -3/ and moderate (30-50%) foliar injury at 400 ..mu..g m/sup -3/. Peroxyacetyl nitrate caused no foliar injury development, either alone or in combination with O/sub 3/, and had no effect on O/sub 3/ injury. Foliar injury on the four cultivars increased in the order Heinz 1350, Tiny Tim, Ace, and Pyxie. Ozone by itself produced a significant linear reduction in growth of the four cultivars. Plants exposed to PAN alone also showed reduced growth but results were not statistically significant at the 0.05 level. Combinations of O/sub 3/ and PAN had less than additive effects on growth reduction, but greater than additive effects on shoot/root ratios. This difference was attributed to greater suppression of root growth relative to leaf growth induced by O/sub 3/-PAN mixtures.

• Research Organization: Univ. of California, Riverside
• OSTI ID: 5148186
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 14:3; ISSN JEVQA
• 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
CONCENTRATION RATIO
DATA
DISPERSIONS
ESTERS
EXPERIMENTAL DATA
EXPOSURE CHAMBERS
FOOD
FRUITS
GROWTH
INFORMATION
INHIBITION
INJURIES
LEAVES
MIXTURES
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
OZONE
PEROXYACETYL NITRATE
POLLUTION
TOMATOES
TOXICITY