Foliar nutrient status of Pinus ponderosa exposed to ozone and acid rain

Conference · Wed May 01 04:00:00 EDT 1991 · Plant Physiology, Supplement; (United States)

OSTI ID:5400091

Anderson, P D; Houpis, J L.J. ^[1]

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1. Lawrence Livermore National Lab., CA (United States)

A direct effect of foliar exposure to acid rain may be increased leaching of nutrient elements. Ozone exposure, through degradation of the cuticle and cellular membranes, may also result in increased nutrient leaching. To test these hypotheses, the foliar concentrations of 13 nutrient elements were monitored for mature branches of three clones of Pinus ponderosa exposed to ozone and/or acid rain. The three clones represented three distinct levels of phenotypic vigor. Branches were exposed to charcoal filtered, ambient, or 2 x ambient concentrations of ozone and received no acid rain (NAP), pH 5.1 rain (5.1), or pH 3.0 (3.0) rain. Following 10 months of continuous ozone exposure and 3 months of weekly rain applications, the concentrations of P and Mg differed significantly among rain treatments with a ranking of: 5.1 < NAP < 3.0. The S concentration increased with rain application regardless of pH. For the clones of moderate and low vigor, the concentration of N decreased with increasing rain acidity. There was no evidence of significant ozone or ozone x acid rain response. Among the three families, high phenotypic vigor was associated with significantly greater concentrations of N, P, K, Mg, B and An. These results indicate generally negligible leaching as a result of exposure to acid rain and/or ozone for one growing season. Increases in foliar concentrations of S, Mg and P are possibly the result of evaporative surface deposition from the rain solution.

• OSTI ID: 5400091
• Report Number(s): CONF-9107184--
• Conference Information: Journal Name: Plant Physiology, Supplement; (United States) Journal Volume: 96:1
• Country of Publication: United States
• Language: English

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01 COAL, LIGNITE, AND PEAT
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54 ENVIRONMENTAL SCIENCES
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACID RAIN
ALKALI METALS
ALKALINE EARTH METALS
ATMOSPHERIC PRECIPITATIONS
BIOLOGICAL EFFECTS
BORON
CHRONIC EXPOSURE
CONIFERS
DISSOLUTION
ELEMENTS
ENVIRONMENTAL IMPACTS
LEACHING
MAGNESIUM
METALS
NONMETALS
NUTRIENTS
OZONE
PHENOTYPE
PHOSPHORUS
PINES
PINOPHYTA
PLANTS
POTASSIUM
RAIN
SEMIMETALS
SENSITIVITY
SEPARATION PROCESSES
SODIUM
TREES
ZINC