Sensitivity and symptomology of marigold cultivars exposed to acute sulfur dioxide

Journal Article · Sun Aug 01 00:00:00 EDT 1982 · HortScience; (United States)

OSTI ID:7132749

Howe, T K; Woltz, S S

Thirty-nine cultivars of marigold (Tagetes spp.) were exposed to sulfur dioxide to determine their relative sensitivity. Flowering plants were fumigated at 1 ppM SO/sub 2/ for 4 hours or at 2 ppM SO/sub 2/ for 2 hours. The average foliar injury for all leaves on individual plants ranged from 42.3% for 'Crackerjack Mix' at 2 ppM SO/sub 2/ to 0.0% for 'Cupid Yellow' at 1 ppM SO/sub 2/. Foliar necrosis appeared as a gray to white marginal and/or interveinal scorch 1 day after exposure. There was a tendency for interveinal necrosis to be near the midvein. The extra-floral nectaries which line the leaf margins of marigold were scorched in 15 of the 39 cultivars. This injury may be of diagnostic value. Sepals were very sensitive to SO/sub 2/. Sepal injury appeared as a pinpoint scorch and as tip burn, and was apparent in some cultivars when no foliar injury occurred. 12 references, 1 figure, 1 table.

• Research Organization: Univ. of Florida, Bradenton
• OSTI ID: 7132749
• Journal Information: HortScience; (United States), Vol. 17:4
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
BIOLOGICAL EFFECTS
LEAVES
NECROSIS
SULFUR DIOXIDE
TOXICITY
FOLIAR UPTAKE
PLANTS
SENSITIVITY
CHALCOGENIDES
OXIDES
OXYGEN COMPOUNDS
PATHOLOGICAL CHANGES
POLLUTION
SULFUR COMPOUNDS
SULFUR OXIDES
UPTAKE
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)