1977
DOI: 10.1111/j.1469-8137.1977.tb02189.x
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Potassium Efflux by Lichen Thalli Following Exposure to Aqueous Sulphur Dioxide*

Abstract: Summary Potassium efflux is a useful experimental quantity for assessing damage to lichens exposed to SO2. This SO2‐induced K+ efflux is biphasic in response to increasing concentrations of aqueous SO2. The first phase can be extrapolated to identify the SO2 concentration at which no K+ release occurred above the control values. This threshold concentration was used to determine the relative sensitivities of various lichen species. Good agreement was observed between the total K+ lost and the reduction in the … Show more

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Cited by 63 publications
(31 citation statements)
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“…The apparatus used was kept simple so that lichen exposure conditions were simulated (see Puckett et al, 1977 and. Consequently, there is good agreement between the observed value of 10.3 for the slope in Eig.…”
Section: Discussionmentioning
confidence: 74%
“…The apparatus used was kept simple so that lichen exposure conditions were simulated (see Puckett et al, 1977 and. Consequently, there is good agreement between the observed value of 10.3 for the slope in Eig.…”
Section: Discussionmentioning
confidence: 74%
“…However, the threshold [SO2] at which K"*" release began was not changed from 9 ppm by increasing the sample size from 150 to 450 mg for this 3 h exposure. Puckett et al (1977) described the biphasic nature of K"^ release in response to SO2. Fig.…”
Section: Potassium Efflux As a Function Of Sample Sizementioning
confidence: 99%
“…2. Extrapolation of the corresponding linear transformations (single reciprocal form of the Michaelis-Menten plot; see Puckett et al, 1977) was helpful in this assessment in most cases. Similarly, linear transformations of the ^' *C fixation data were extrapolated to zero % reduction to obtain threshold SO2 values.…”
Section: Threshold [^Oa] As a Function Of Exposure Timementioning
confidence: 99%
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