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Effect of atmospheric fluorides upon certain metabolic processes in Valencia orange leaves

Journal Article · · Proc. Fla. State Hortic. Soc.; (United States)
OSTI ID:5319026
;
The removal of fluoride from the atmosphere around Valencia orange trees resulted in greater rates of photosynthesis, enhanced chlorophyll contents and lower rates of respiration. The degree of removal of fluoride was estimated by leaf analysis and by the degree of development of fluoride leaf scorch of gladiolus indicator plants. Preliminary procedures were tested for the removal and measurement of leaf-surface reacted fluorides. Time course measurements were made of the resistance of leaf-surface fluorides to removal by weathering outdoors. It was found that surface reacted fluoride from hydrofluoric acid solution dips remained on the leaves outdoors for nine days. Brief immersion (15 seconds) in dilute hydrofluoric acid solutions results in a depression in photosynthesis activity and in a significant closure of stomata. Needs for further research are discussed. 9 references, 7 tables.
Research Organization:
Gulf Coast Experiment Station, Bradenton, FL
OSTI ID:
5319026
Journal Information:
Proc. Fla. State Hortic. Soc.; (United States), Journal Name: Proc. Fla. State Hortic. Soc.; (United States) Vol. 77; ISSN PFSHA
Country of Publication:
United States
Language:
English

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Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
BIOLOGICAL FUNCTIONS
BIOLOGICAL INDICATORS
CHEMICAL REACTIONS
CITRUS
FLUORIDES
FLUORINE COMPOUNDS
FOOD
FRUIT TREES
FRUITS
FUNCTIONS
HALIDES
HALOGEN COMPOUNDS
INHIBITION
OPENINGS
ORANGES
ORNAMENTAL PLANTS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANTS
RESPIRATION
STIMULATION
STOMATA
SYNTHESIS
TREES