Richardson, DHS/ Nieboer, E/ Lavoie, P/ Padovan, D 1979: The role of metal-ion binding in modifying the toxic affects of sulphur dioxide on the lichen Umbilicaria muhlenbergii. II. 14C-fixation studies. - New Phytologist82: 633-643. [RLL List # 104-95 / Rec.# 15575] Keywords: UMBILICARIA/ PHOTOSYNTHESIS/ ION BINDING/ SO2/ AIR POLLUTION
Abstract: 4 figures. ["Protection against damage due to SO2 exposure was rendered by the uptake of class A ions and even borderline ions except those normally accumulated intercellularly (Mg2+, Zn2+) or possessing the capacity to penetrate cells readily (Cu2+)." It is suggested that the reduced damage from SO2 on basic substrates may be due to the Ca2+ ion rather than the supposed buffering effect.]
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