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

Journal Article (Journal Article)

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 Califormian 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.

Full Text

Duke Authors

Cited Authors

  • Winner, WE; Mooney, HA

Published Date

  • January 1, 1979

Published In

Volume / Issue

  • 44 / 3

Start / End Page

  • 290 - 295

PubMed ID

  • 28310282

Electronic International Standard Serial Number (EISSN)

  • 1432-1939

International Standard Serial Number (ISSN)

  • 0029-8549

Digital Object Identifier (DOI)

  • 10.1007/bf00545230


  • eng