Stomatal response and leaf injury of Pisum sativum L. with SO/sub 2/ and O/sub 3/ exposures. II. Influence of moisture stress and time of exposure
Stomatal response during exposure to SO/sub 2/ and O/sub 3/ and subsequent leaf injury were examined in plants of Pisum sativum L. Alsweet grown in a peat-vermiculite medium in controlled environment chambers. Plants developing under moisture stress, induced by drying the medium to 50% of field capacity, exhibited greater stomatal closure during exposures and less than one-fourth the necrosis compared to plants developing in a medium maintained at field capacity. Plants under moisture stress had only a slightly more negative plant water potential (approx. = 4.0 bars) than at field capacity (approx. = 3.4 bars). Plants exposed to pollutants for 2 hours near the beginning or end of a 16-hour light period had greater stomatal closure during exposures and less leaf necrosis than plants exposed during the middle of the light period.
- Research Organization:
- Univ. of Wisconsin, Madison
- OSTI ID:
- 6524586
- Journal Information:
- Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 67:3; ISSN PLPHA
- Country of Publication:
- United States
- Language:
- English
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Stomatal response and leaf injury of Pisum sativum L. with SO/sub 2/ and O/sub 3/ exposures. I. Influence of pollutant level and leaf maturity
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
551000 -- Physiological Systems
553000 -- Agriculture & Food Technology
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
60 APPLIED LIFE SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ATMOSPHERES
BIOLOGICAL EFFECTS
BIOLOGICAL FUNCTIONS
BIOLOGICAL STRESS
CHALCOGENIDES
CHRONIC EXPOSURE
CONTROLLED ATMOSPHERES
EXPOSURE CHAMBERS
FUNCTIONS
HOURLY VARIATIONS
LEAVES
LEGUMINOSAE
MOISTURE
OPENINGS
OXIDES
OXYGEN COMPOUNDS
OZONE
PATHOLOGICAL CHANGES
PHOTOPERIOD
PISUM
PLANTS
RESPONSE MODIFYING FACTORS
STOMATA
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
VARIATIONS