Nitrogen dioxide and sulfur dioxide interact to injure horticultural and agronomic crops
Six horticultural and agronomic crops were exposed for 4 hours to nitrogen dioxide (NO/sub 2/) and/or sulfur dioxide (SO/sub 2/) in greenhouse exposure chambers. Concentrations of NO/sub 2/ in excess of 200 pphm and concentrations of SO/sub 2/ in excess of 50 pphm were required to cause injury. Plant injury developed when the gases were mixed together in the concentration ranges of 5-25 pphm of both gases. Injury from either NO/sub 2/ or SO/sub 2/ acting alone appeared as a marginal and interveinal bifacial necrosis. The injury produced by the mixture of the two gases developed as chlorotic and necrotic flecking on the upper leaf surface of the interveinal areas of tomato, radish, oats, and tobacco. Reddish-brown pigmented lesions developed on pinto bean and soybean. Lower leaf surface injury frequently occurred in mixed gas fumigations with little or no upper surface injury. Upper leaf surface injury on all plants was similar to ozone injury. The low concentrations of these gases causing phytotoxicity implies that this interaction could be important in causing plant injury in the field.
- Research Organization:
- NAPCA, Raleigh, NC
- OSTI ID:
- 5262599
- Journal Information:
- HortScience; (United States), Vol. 5:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CROPS
INJURIES
LEAVES
NECROSIS
NITROGEN DIOXIDE
TOXICITY
SULFUR DIOXIDE
AIR POLLUTION
CONTROLLED ATMOSPHERES
GLYCINE HISPIDA
NICOTIANA
OATS
PHASEOLUS
RADISHES
SYNERGISM
TOMATOES
ATMOSPHERES
CEREALS
CHALCOGENIDES
FOOD
FRUITS
GRASS
LEGUMINOSAE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PATHOLOGICAL CHANGES
PLANTS
POLLUTION
SULFUR COMPOUNDS
SULFUR OXIDES
VEGETABLES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)