Chemical composition of the periderm in relation to in situ water absorption rates of oak, beech and spruce fine roots Christoph Leuschner, Heinz Coners, Regina Icke, Klaus Hartmann, N. Dominique Effinger and Lukas Schreiber Ann. For. Sci., 60 8 (2003) 763-772 DOI: 10.1051/forest:2003071