Induction of genes for the stress proteins PR‐10 and PAL in relation to growth, visible injuries and stomatal conductance in birch (Betula pendula) clones exposed to ozone and/or drought. - Pääkkönen,E..; Seppänen,S..; Holopainen,T..; Kokko,H..; Kärenlampi,S..; Kärenlampi,L..; Kangasjärvi,J.. (New Phytologist, 1998)