Details

Autor(en) / Beteiligte

• Winner, W.E
• Mooney, H.A

Titel

Ecology of SO2 resistance: I. Effects of fumigations on gas exchange of deciduous and evergreen shrubs

Ist Teil von

• Oecologia, 1980, Vol.44 (3), p.290-295

Ort / Verlag

Springer-Verlag

Erscheinungsjahr

1980

Quelle

SpringerLINK Contemporary (Konsortium Baden-Württemberg)

Beschreibungen/Notizen

• A unique gas exchange system is described in which photosynthesis, transpiration, and stomatal conductance can be measured on leaves during SO₂ fumigations. SO₂ concentrations can be continuously monitored and manipulated between 0 and 2.0 ppm. Rates of total SO₂ uptake and SO₂ absorption through stomates of a fumigated leaf can also be determined. Using this system we compared the effects of SO₂ on the gas exchange rates of two shrub species that co-occur in the Californian chaparral. Diplacus aurantiacus, a deciduous shrub, was more sensitive to SO₂ fumigation than Heteromeles arbutifolia, an evergreen shrub. The differences in photosynthetic sensitivity could be attributed, in large part, to differential SO₂ absorption rates.