The Effects of Sulphur Dioxide on Lichen Respiration

Effects of SO2 fumigations on photosynthetic CO2 gas exchange, chlorophyll a fluorescence emission and antioxidant enzymes in the lichens Evernia prunastri and Ramalina farinacea

“…The low sensitivity to SO 2 of R. farinacea and of its isolated lichen phycobiont has been established in the works of Baddeley et al (1972) and Marti (1983). In addition, Balaguer and Manrique (1991) have reported on the resistance to SO 2 of R. farinacea compared to E. prunastri .…”

THE INFLUENCE OF AIR POLLUTION ON THE CONCENTRATION OF ATP AND ON CHLOROPHYLL DEGRADATION IN THE LICHEN, RAMALINA DURIAEI (DE NOT.) BAGL.

“…Lichens are known to be sensitive to many types of pollution and are good biological monitors of air quality. A variety of biological parameters have been used to assess pollution damage to lichens, including respiration (Baddeley, Ferry & Finegan, 1972), photosynthesis (Showman, 1972;Puckett et al, 1973;, chlorophyll degradation and chlorophyll fluorescence (Kauppi, 1980). The effects of air pollution have been recorded in lichens in their natural habitat, or in lichens that were transplanted from clean to polluted areas (Brodo, 1961;Kauppi, 1976;Ferry &Coppins, 1979;Ronen ei a/., 1984;Garty, Ronen & Galun, 1985).…”

Exploring causes of the decline of the lichenLecanora conizaeoidesin Britain: effects of experimental N and S applications

“…Studies of lichen physiology in response to experimental applications of pollutants have largely confirmed the exceptional toxitolerance of L. conizaeoides, especially to SO 2 (Hill 1971(Hill , 1974Baddeley et al 1972;Turk et al 1974). Several writers have speculated that the high tolerance to SO 2 by L. conizaeoides may be a function of its thick, crustose and markedly waterrepellent thallus resisting the absorption of both gaseous and dissolved forms of the pollutant (e.g.…”

“…Sodium bisulphite solution was used to simulate dissolved SO 2 (e.g. Hill 1971Hill , 1974Baddeley et al 1972), it was hypothesized that 0·2 mM bisulphite would be only mildly injurious to L. conizaeoides and might even stimulate its growth (e.g. There are considerable difficulties in equating short spray applications of pollutants on the vertical and relatively non-absorbent bark surface of a tree to pollutant concentrations in air and rainfall or depositions to a flat and highly permeable soil surface.…”