TY - Generic T1 - Chlorophyll a fluorescence emission, xanthophyll cycle activity and net photosynthetic rate responses to ozone in some foliose and fruticose lichen species Y1 - 2000 A1 - Calatayud, A. A1 - Temple, P.J. A1 - Barreno, E. JF - Photosynthetica VL - 38 ER -