A New Method of Measuring Lichen Respiration: Response of Selected Species to Temperature, pH and Sulphur Dioxide

Baddeley, M. Susan; Ferry, Brian; Finegan, Esther J.

doi:10.1017/s0024282971000057

Cited by 31 publications

(10 citation statements)

References 15 publications

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“…The swift reduction in photosynthetic ^'C fixation by lichens following exposure to aqueous sulphur dioxide does not appear to be due to enhanced respiration (see Baddeley. Ferry and Finegan, 1971), nor to detectable changes in the photosynthetic pigments.…”

Section: Discussionmentioning

confidence: 99%

PHOTOSYNTHETIC ¹⁴C FIXATION BY THE LICHEN UMBILICARIA MUHLENBERGH (ACH) TUCK. FOLLOWING SHORT EXPOSURES TO AQUEOUS SULPHUR DIOXIDE

et al. 1974

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SUMMARY Photosynthetic 14C fixation by the lichen Umbilicaria muhlenbergii was reduced within 15 min of exposure to aqueous sulphur dioxide (75 ppm, pH 3.0), but no changes were observed in the spectra of extracted chlorophyll pigments. Exposed lichen samples maintained under moist, sulphur‐dioxide‐free conditions in the light for 24 h were able to fix 14C at pre‐exposure levels. Partial recovery was observed when samples were kept under moist dark conditions but little when the lichens were maintained dry in the light or dark. When samples were exposed repeatedly to sulphur dioxide, but with a recovery period between each exposure, they gradually lost the ability to regain their photosynthetic activity. After the third cycle of exposure and recovery, little 14C fixation was observed while changes in the spectra of extracted pigments was evident. Increased potassium levels were found in the medium during exposure. These levels reverted to control values after a suitable recovery period. In vitro studies showed that 10‐20 ppm sulphur dioxide was found to deactivate both staphylococcal nuclease and lysozyme. Possible explanations as to the mode of SO2 toxicity on lichen metabolism and suggestions as to recovery mechanisms are fully discussed.

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Section: Discussionmentioning

confidence: 99%

PHOTOSYNTHETIC ¹⁴C FIXATION BY THE LICHEN UMBILICARIA MUHLENBERGH (ACH) TUCK. FOLLOWING SHORT EXPOSURES TO AQUEOUS SULPHUR DIOXIDE

et al. 1974

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“…Decreases in respiratory rates of lichens immersed in sulphite solutions have been taken as symptoms of SO, injury (Baddeley et al 1971(Baddeley et al , 1972. Even so, lichens fumigated with SO2 or immersed in sulphite solutions show greater impairment of photosynthesis than of respiration (Turk et al 1974;Wirth and Turk 1975).…”

Section: So2 Effects Upon C 0 2 Exchange Rates By Mossesmentioning

confidence: 99%

Photosynthesis and respiration of feather mosses fumigated at different hydration levels with SO₂

Winner¹,

Bewley²

1983

Can. J. Bot.

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WINNER, W. E., and J. D. BEWLEY. 1983. Photosynthesis and respiration of feather mosses fumigated at different hydration levels with SO2. Can. J. Bot. 61: 1456-1461. Fumigation with SO2 of the three feather mosses Pleuroziurn schreberi, Hylocomirtm splendens, and Ptilium crista-castrensis results in an immediate decline in their rate of photosynthesis but has no effect upon respiration. Pleuroziurn schreberi is the most sensitive of the three species, even though they all take up the same amount of SOz. Thus, the feather moss species appear to have similar degrees of SOz avoidance (uptake) but dissimilar degrees of SO2 tolerance. With increasing desiccation, respiration declines equally in all three species, but photosynthesis declines most rapidly for P. schreberi. The immediate effects of SO2 upon photosynthesis of water-limited and of fully hydrated feather mosses are similar, but after a 24-h recovery period in an SO2-free environment photosynthesis remains impaired only in those mosses fumigated in the fully hydrated state. This probably is related to the larger amounts of SO2 absorbed by hydrated mosses.WINNER, W. E., et J. D. BEWLEY. 1983. Photosynthesis and respirationof feather mosses fumigated at different hydration levels with SO2. Can. J. Bot. 61: 1456-1461. La fumigation par du SO2 de trois mousses hypnacCes, Pleurozirtm schreberi, Hylocomium splendens et Ptiliitm crista-castrensis, provoque une diminution immCdiate de leur taux de photosynthkse, mais n'a aucun effet sur leur respiration. P. schreberi est la plus sensible des trois espkces, m&me si elles absorbent toutes la m&me quantitC de SO?. ParconsCquent, il semble que les espkces Cvitent (absorbent) le SO2 i des degrCs semblables, mais qu'elles prksentent des degrCs diffkrents de tolkrance au SO2. Avec une augmentation de la dessication, la respiration diminue au m&me taux chez les trois espkces, mais la photosynthkse diminue le plus rapidement chez P. schreberi. Les effets immkdiats du SO2 sur la photosynthkse sont semblables chez les mousses carencies en eau et chez les mousses complktement hydratCes mais, aprks une pCriode de rCtablissement de 24 h dans un environnement sans SO2, la photosynthkse demeure affectke seulement chez les mousses fumigCes lorsqu'elles Ctaient complktement hydratCes. Ce phknomkne s'explique probablement par les plus fortes quantitCs de SOz absorbCes par les mousses hydraties.[Traduit par le journal]

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“…Las distintas especies epífitas manifiestan "re_ sistencias" muy diferentes a los contaminantes y en par_ ticular al dióxido de azufre que es la sustancia responsable de la mayor parte de la depauperación déla ve getación epifítica en áreas urbanas e industriales (vjé anse las revisiones generales de Coppins (1973) , Hawks_ worth (1973) y Gilbert (1974); los efectos del S02 s¿ bre la fisiología de liqúenes y briófitos han sido estudiados, entre otros, por Baddeley et al(1971Baddeley et al( , 1972Baddeley et al( , 1973, Ferry y Baddeley (1976), LeBlanc y Rao (1973, Pearson (1973), Puckett et al (1973Puckett et al ( , 1974 y Showman (1972); los efectos de otros contaminantes se tratan en James (1973), Gilbert (1971Gilbert ( , 1973, LeBlanc et al (1971), Nash (1971), Nieboer et al (1972),y Sea ward (1974) ) . Esta sensibilidad específica es la base de muchos de los métodos empleados para evaluar la contaminación a partir de los epífitos, como la "escala biológica" de Hawksworth y Rose (1970) o la elaboración de índices como el IAP de LeBlanc y de Slogver (1970)o el uso del número de especies (riqueza) de cada locaM dad .…”

Section: Introductionunclassified

Epífitos y contaminación atmosférica en los alrededores de Sabadell (Catalunya)

Llanza¹

1979

MDTRRA

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A New Method of Measuring Lichen Respiration: Response of Selected Species to Temperature, pH and Sulphur Dioxide

Cited by 31 publications

References 15 publications

PHOTOSYNTHETIC ¹⁴C FIXATION BY THE LICHEN UMBILICARIA MUHLENBERGH (ACH) TUCK. FOLLOWING SHORT EXPOSURES TO AQUEOUS SULPHUR DIOXIDE

PHOTOSYNTHETIC ¹⁴C FIXATION BY THE LICHEN UMBILICARIA MUHLENBERGH (ACH) TUCK. FOLLOWING SHORT EXPOSURES TO AQUEOUS SULPHUR DIOXIDE

Photosynthesis and respiration of feather mosses fumigated at different hydration levels with SO₂

Epífitos y contaminación atmosférica en los alrededores de Sabadell (Catalunya)

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A New Method of Measuring Lichen Respiration: Response of Selected Species to Temperature, pH and Sulphur Dioxide

Cited by 31 publications

References 15 publications

PHOTOSYNTHETIC 14C FIXATION BY THE LICHEN UMBILICARIA MUHLENBERGH (ACH) TUCK. FOLLOWING SHORT EXPOSURES TO AQUEOUS SULPHUR DIOXIDE

PHOTOSYNTHETIC 14C FIXATION BY THE LICHEN UMBILICARIA MUHLENBERGH (ACH) TUCK. FOLLOWING SHORT EXPOSURES TO AQUEOUS SULPHUR DIOXIDE

Photosynthesis and respiration of feather mosses fumigated at different hydration levels with SO2

Epífitos y contaminación atmosférica en los alrededores de Sabadell (Catalunya)

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PHOTOSYNTHETIC ¹⁴C FIXATION BY THE LICHEN UMBILICARIA MUHLENBERGH (ACH) TUCK. FOLLOWING SHORT EXPOSURES TO AQUEOUS SULPHUR DIOXIDE

PHOTOSYNTHETIC ¹⁴C FIXATION BY THE LICHEN UMBILICARIA MUHLENBERGH (ACH) TUCK. FOLLOWING SHORT EXPOSURES TO AQUEOUS SULPHUR DIOXIDE

Photosynthesis and respiration of feather mosses fumigated at different hydration levels with SO₂