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

Journal Article · Thu Dec 31 23:00:00 EST 1981 · 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), Journal Name: Phytopathology; (United States) Vol. 72:7; ISSN PHYTA
• 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
FOOD
INJURIES
OXIDES
OXYGEN COMPOUNDS
OZONE
PLANTS
POLLUTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TOMATOES
VEGETABLES