, Volume 44, Issue 3, pp 290–295 | Cite as

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

  • William E. Winner
  • Harold A. Mooney


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.


Exchange Rate Photosynthesis Stomatal Conductance Absorption Rate Exchange System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • William E. Winner
    • 1
  • Harold A. Mooney
    • 1
  1. 1.Department of Biological SciencesStanford UniversityStanfordUSA

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