Photosynthetic response to SO/sub 2/ fumigation in red maple

Journal Article · Fri Jan 01 04:00:00 EST 1971 · Plant Physiol.; (United States)

OSTI ID:5262639

Roberts, B R; Townsend, A M; Dochinger, L S

Five-month-old seedlings of red maple (Acer rubrum L.) were fumigated with sulfur dioxide in a controlled environment for 4 or 6 hrs prior to measuring net photosynthesis. Concentrations of 6 ppm SO/sub 2/ caused acute foliar necrosis and resulted in depressed rates of photosynthesis. Plants fumigated at lower SO/sub 2/ levels (1 ppm) exhibited no foliar injury and showed a slight stimulation in CO/sub 2/ exchange when compared to unfumigated controls. Post fumigation recovery of maple seedlings exposed to 4.5 ppm SO/sub 2/ for 6 hrs was also studied. Net photosynthesis of SO/sub 2/-treated plants increased 88% during the 48 hr period following fumigation. This recovery occurred despite the gradual appearance of foliar damage on many of the treated seedlings. No correlation was found between the degree of stomatal opening and subsequent development of foliar symptoms in fumigated plants.

• Research Organization: Dept. of Agriculture, Delaware, OH
• OSTI ID: 5262639
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 47; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
DOSE-RESPONSE RELATIONSHIPS
INHIBITION
MAPLES
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANTS
SEEDLINGS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SYNTHESIS
TREES