Response of tomatoes to ozone, sulphur dioxide, and infection by Pratylenchus penetrans

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Phytopathology; (United States)

DOI:https://doi.org/10.1094/Phyto-72-822· OSTI ID:6547561

Shew, B B; Reinert, R A; Barker, K R

Tomato plants (Lycopersicon esculentum 'Walter') were inoculated with initial population densities of Pratylenchus penetrans ranging 0-4000 nematodes per pot and were repeatedly exposed to ozone (O/sub 3/). Exposures to charcoal-filtered air served as controls. Decreases in dry weights of plant parts excised from tomato plants exposed to 0.2 ..mu..l O/sub 3/ per liter of air added to the decrease in dry weight caused by exposure to sulfur dioxide (SO/sub 2/) at 0.2 ..mu..l/L of air adequately predicted the decrease in dry weight of tomato plants caused by exposure to 0.2 ..mu..l O/sub 3/ + 0.2 ..mu..l SO/sub 2/ per liter of air. When 0.2 ..mu..l O/sub 3/ and 0.8 ..mu..l SO/sub 2/ per liter of air were present in mixture, they acted antagonistically and caused less change in leaf and shoot dry weight than could be predicted by the main effects of O/sub 3/ or SO/sub 2/. The presence of P. penetrans attacking the roots enhanced the negative effects of O/sub 3/ + SO/sub 2/ on leaf growth (dry weight), but suppressed the inhibitory effects of O/sub 3/ + SO/sub 2/ on auxillary shoot dry weight. Treatments containing 0.8 ..mu..l SO/sub 2/ per liter of air reduced tomato fruit weight, but the amount of reduction was antagonized by the presence of O/sub 3/.

• Research Organization: North Carolina State Univ., Raleigh
• OSTI ID: 6547561
• Journal Information: Phytopathology; (United States), Vol. 72:7
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
OZONE
BIOLOGICAL EFFECTS
SULFUR DIOXIDE
TOMATOES
INJURIES
AIR POLLUTION
COMPARATIVE EVALUATIONS
CHALCOGENIDES
FOOD
OXIDES
OXYGEN COMPOUNDS
PLANTS
POLLUTION
SULFUR COMPOUNDS
SULFUR OXIDES
VEGETABLES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)