Effect of chronic ozone exposures on the metabolite content of Ponderosa pine seedlings. [Pinus ponderosa]

Journal Article · Thu Jan 01 04:00:00 EST 1976 · For. Sci.; (United States)

OSTI ID:5483362

Tingey, D T; Wilhour, R G; Standley, C

Ponderosa pine (Pinus ponderosa Laws.) seedlings were grown in field exposure chambers and fumigated with ozone at a concentration of 200 ..mu..g/m/sup 3/ 6 h/day; 7days/wk for variable periods up to 20 weeks. Pines were harvested at 4 wk intervals to determine the levels of the metabolites in tops (stem and needles) and roots. The ozone exposure affected the metabolite pools in the roots and tops differentially. The ozone treatment had no effect on the nitrogen or amino acid content of the tops but increased the levels of these pools in the roots. The levels of soluble sugars, starch, and phenols tended to increase in the tops and decrease in their roots of the ozone-exposed plants. The ozone treatment had no effect on lignin content in either the roots or tops. 37 references, 6 figures, 2 tables.

• OSTI ID: 5483362
• Journal Information: For. Sci.; (United States), Journal Name: For. Sci.; (United States) Vol. 22:3; ISSN FOSCA
• 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.
AIR POLLUTION
AMINO ACIDS
AROMATICS
BIOLOGICAL EFFECTS
CARBOHYDRATES
CARBOXYLIC ACIDS
CHRONIC EXPOSURE
CONIFERS
DISACCHARIDES
ECOLOGICAL CONCENTRATION
ELEMENTS
EXPOSURE CHAMBERS
HYDROXY COMPOUNDS
LIGNIN
METABOLITES
NITROGEN
NONMETALS
OLIGOSACCHARIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OZONE
PHENOLS
PINES
PLANT STEMS
PLANTS
POLLUTION
POLYSACCHARIDES
REAGENTS
RESPONSE MODIFYING FACTORS
ROOTS
SACCHARIDES
SACCHAROSE
SEEDLINGS
STARCH
TREES