Effects of desiccation and freezing on vitality and field performance of broadleaved tree species (original) (raw)

2001, Annals of Forest Science

Seedlings of Acer pseudoplatanus L., Fraxinus ornus L. and Castanea sativa Miller., were exposed to desiccating conditions (15 °C, 50% RH, air movement 0.3 m s -1 , photosynthetic active radiation 350 µmol m -2 s -1 ) and freezing (-5°C, darkness). The effect of stress factors on seedling quality was assessed using root electrolyte leakage, water potential and moisture content of fine roots. After treatments, seedlings were outplanted in a field site. The effects of desiccation and freezing on planting stock quality and field performance varied and depended upon the length of exposure and species. Root electrolyte leakage values were significantly related to field performance rates of seedlings exposed to both stress factors. Root moisture content and root water potential were related to survival only in the case of desiccation treatment.