Metabolic changes in amino acids in leaves exposed to ozone

Journal Article · Sat Jan 01 04:00:00 EST 1966 · Phytopathology; (United States)

OSTI ID:5194593

Tomlinson, H; Rich, S

Total free amino acids increased in the leaves of various plants, including snap beans, that were visibly damaged by ozone. Following the exposure of primary bean leaves to 1.0 ppm ozone for 10 min the leaves were not visibly damaged, but the amounts of 3 free amino acids changed consistently. Amounts of ..gamma..-amino-butyric acid and alanine increased, whereas the quantity of glutamic acid decreased. These rapid metabolic changes could also be induced in bean leaves by feeding them the sulphydryl reagents iodoacetic acid (10/sup -4/ M) or n-iodoacetamide (10/sup -3/ M). Leaves fed these reagents developed symptoms resembling those of ozone injury. Experiments with C/sup 14/O/sub 2/ indicated that changes in the free amino acids of leaves exposed to ozone did not result from proteolysis. Ozone-induced changes in free amino acids may cause injury, or they may reflect injury resulting from the destruction of essential sulphydryl groups.

• Research Organization: Connecticut Agricultural Experimental Station, New Haven
• OSTI ID: 5194593
• Journal Information: Phytopathology; (United States), Journal Name: Phytopathology; (United States) Vol. 56; ISSN PHYTA
• Country of Publication: United States
• Language: English

Related Subjects

560301 -- Chemicals Metabolism & Toxicology-- Cells-- (-1987)
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALANINES
AMINO ACIDS
AMINOBUTYRIC ACID
AUTONOMIC NERVOUS SYSTEM AGENTS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
CARBON 14
CARBON ISOTOPES
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CORRELATIONS
DAMAGE
DRUGS
EVEN-EVEN NUCLEI
GLUTAMIC ACID
ISOTOPES
LEAVES
LIGHT NUCLEI
NEUROREGULATORS
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
OZONE
RADIOISOTOPES
SYMPTOMS
YEARS LIVING RADIOISOTOPES