Puckett, KJ/ Richardson, DHS/ Flora, WP/ Nieboer, E 1974: Photosynthetic 14C fixation by the lichen Umbilicaria muhlenbergii (Ach.) Tuck. following short exposures to aqueous sulphur dioxide. - New Phytol.73: 1183-1192. [RLL List # 92-69 / Rec.# 15020] Keywords: PHOTOSYNTHESIS/ CARBON FIXATION/ UMBILICARIA/ SO2/ AIR POLLUTION/ PHYSIOLOGY/ CHLOROPHYLL
Abstract: 3 fig. 5 tab. [Photosynhetic 14C fixation "was reduced within 15 min. of exposure to aqueous sulphur dioxide ... but no changes were observed in the spectra of extracted chlorophyll pigments."]
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