Effect of ozone on transpiration of pinto bean leaves

Journal Article · Mon Jan 01 00:00:00 EST 1968 · Proc. Utah Acad. Sci., Arts, Lett.; (United States)

OSTI ID:5194707

MacKnight, M L; McNulty, I B

In the present study, the effect of ozone on the transpiration rates of attached Pinto bean leaves was investigated. A 30-minute fumigation of 20-40 pphm ozone was observed to cause a decrease in the transpiration rate of certain aged leaves. Medium aged leaves (19-24 days old) always displayed such a decrease in transpiration rate, whereas the transpiration rates of young (3-8 days) and of old (31-46 days) leaves were not affected by ozone. A decrease in transpiration rate was always followed by the appearance of visible damage to the leaf in one to two days following the ozone fumigation. The extent of the reduction in transpiration rate was dependent upon the ozone concentration, the season of the year, and the intensity of light prior to fumigation.

• Research Organization: Univ. of Utah, Salt Lake City
• OSTI ID: 5194707
• Journal Information: Proc. Utah Acad. Sci., Arts, Lett.; (United States), Vol. 45:1
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
LEAVES
TRANSPIRATION
OZONE
BIOLOGICAL EFFECTS
AGE DEPENDENCE
DOSE-RESPONSE RELATIONSHIPS
PHASEOLUS
RESPONSE MODIFYING FACTORS
SEASONAL VARIATIONS
VISIBLE RADIATION
ELECTROMAGNETIC RADIATION
LEGUMINOSAE
PLANTS
RADIATIONS
VARIATIONS
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)