Evaluation of injury to expanded and expanding leaves of peas exposed to sulfur dioxide and ozone

Journal Article · Mon Mar 01 00:00:00 EST 1982 · J. Am. Soc. Hortic. Sci.; (United States)

OSTI ID:5775840

Olszyk, D M; Tibbitts, T W

Necrosis, chlorophyll concentration, dry weight and surface area measurements were made to evaluate injury to leaves of Pisum sativum L. cv Alsweet grown under controlled environments and exposed to sulfur dioxide, ozone and combinations of sulfur dioxide plus ozone. Injury evaluations were made at low pollutant levels causing slight necrotic injury and high levels causing severe necrotic injury. At low levels, expanded leaves with a trace of necrotic injury had a 10% reduction in chlorophyll concentration but no reductions in dry weight or surface area, while expanding leaves, also with a trace of necrotic injury, had a reduction in chlorophyll concentration accompanied by reductions in dry weight and surface area. At high pollutant levels, expanded leaves with severe necrotic injury had a 70% reduction in chlorophyll concentration and significant reductions in dry weight and surface area, while expanding leaves had a smaller amount of necrotic injury and a smaller reduction in chlorophyll concentration, but reductions in dry weight and surface area similar to those in expanded leaves. Thus, the following measurements are proposed as reliable indicators of injury at pollutant concentrations just above the threshold for injury: chlorophyll concentration for expanded leaves and surface area for expanding leaves. Reliable indicators of injury at higher concentrations causing serious injury to leaves are: necrosis for expanded leaves and chlorophyll concentration, dry weight, and surface area for expanding leaves. 19 references, 4 figures, 3 tables.

• Research Organization: Univ. of Wisconsin, Madison
• OSTI ID: 5775840
• Journal Information: J. Am. Soc. Hortic. Sci.; (United States), Vol. 107:2
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL INDICATORS
LEAVES
INJURIES
OZONE
TOXICITY
SULFUR DIOXIDE
CHLOROPHYLL
CONTROLLED ATMOSPHERES
DOSE-RESPONSE RELATIONSHIPS
NECROSIS
PISUM
SURFACE AREA
SYNERGISM
WEIGHT MEASUREMENT
ATMOSPHERES
CARBOXYLIC ACIDS
CHALCOGENIDES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LEGUMINOSAE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PATHOLOGICAL CHANGES
PHYTOCHROMES
PIGMENTS
PLANTS
POLLUTION
PORPHYRINS
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)