Lange, OL/ Tenhunen, JD 1981: Moisture content and CO2 exchange of lichens. II. Depression of net photosynthesis in Ramalina maciformis at high water content is caused by increased thallus carbon dioxide diffusion resistance. - Oecologia51: 426-429. [RLL List # 113-57 / Rec.# 11053] Keywords: RAMALINA/ PHOTOSYNTHESIS/ WATER RELATIONS/ CO2 DIFFUSION/ PHYSIOLOGY
Abstract: ["We conclude that the carboxylation capacity of the lichen is not affected by high contents of liquid water. Therefore, the depression of CO2 uptake of the water saturated lichen at lower (e.g. natural) ambient CO2 must be due exclusively to increased resistance to CO2 diffusion from external air to the sites of carboxylation."]