Afm. Vanhees, GROWTH AND MORPHOLOGY OF PEDUNCULATE OAK (QUERCUS-ROBUR L) AND BEECH (FAGUS-SYLVATICA L) SEEDLINGS IN RELATION TO SHADING AND DROUGHT, Annales des Sciences Forestieres, 54(1), 1997, pp. 9-18
The effects of three intensities of shading in combination with drough
t on the growth and morphology of pedunculate oak and beech seedlings
were studied in a pot experiment. The two species responded similarly
to shading, but had different reactions to drought. Shading reduced gr
owth, increased partitioning to stem and branches, increased leaf area
and reduced partitioning to fine roots. Drought reduced growth, decre
ased partitioning to leaves and increased partitioning to fine root bi
omass. In beech, drought increased the diameter of fine roots; the inc
reased partitioning to these roots did not increase fine root length.
In oak, drought combined with high light resulted in less partitioning
to stem and branches and increased partitioning to coarse roots.