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Absorption and translocation of sulfur dioxide by seedlings of four forest tree species

Journal Article · · J. Environ. Qual.; (United States)
Rates of absorption of SO/sub 2/ and of translocation of absorbed sulfur were determined in sugar maple (Acer saccharum Marsh.), bigtooth aspen (Populus grandidentata Michx.), white ash (Fraxinus americana L.), and yellow birch seedlings (Betula alleghaniensis Britton (Betula lutea Michx. f.)). Bigtooth aspen, a sensitive species, had the highest absorption rate with no prefumigation and sugar maple, a tolerant species, had the lowest. After 20 hours or more of prefumigation with 1,965 ..mu..g/m/sup 3/ (0.75 ppm) SO/sub 2/, the rate of sulfur absorption was reduced in all species except white ash, a species intermediate in sensitivity. The relationship between species sensitivity and absorption rate thus changed with the prefumigation treatment. The foliar sulfur content of all species increased with SO/sub 2/ fumigation. Sulfur-35 absorbed from the atmosphere as /sup 35/SO/sub 2/ was concentrated mainly in the leaves shortly after fumigation, but by the eighth day had been translocated throughout the plants. Amounts of sulfur translocated to roots varied with species. (auth)
Research Organization:
Univ. of Wisconsin, Madison
OSTI ID:
7364290
Journal Information:
J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 4:3; ISSN JEVQA
Country of Publication:
United States
Language:
English