Number 4, April

Tree Physiology 18:211–222 [ Summary ] [ Full Text ]
Dynamics of change in stomatal response and water status of Picea abies during a persistent drought period: a contribution to the traditional view of plant water relations
Uta Maier-Maercker

Tree Physiology 18:223–232 [ Summary ] [ Full Text ]
Variability of the photosynthetic characteristics of mature needles within the crown of a 25-year-old Pinus pinaster
Annabel Porté and Denis Loustau

Tree Physiology 18:233–241 [ Summary ] [ Full Text ]
Effects of elevated CO₂ concentration and nutrition on net photosynthesis, stomatal conductance and needle respiration of field-grown Norway spruce trees
Peter Roberntz and Jan Stockfors

Tree Physiology 18:243–249 [ Summary ] [ Full Text ]
Seasonal fluctuations of starch in root and stem tissues of coppiced Salix viminalis plants grown under two nitrogen regimes
Yuehua Von Fircks and Lisa Sennerby-Forsse

Tree Physiology 18:251–257 [ Summary ] [ Full Text ]
Morphological and physiological markers of juvenility and maturity in shoot cultures of oak (Quercus robur and Q. petraea)
E. McGowran, G. C. Douglas and M. Parkinson

Tree Physiology 18:259–264 [ Summary ] [ Full Text ]
Differences in root longevity of some tree species
K. E. Black, C. G. Harbron, M. Franklin, D. Atkinson and J. E. Hooker

Tree Physiology 18:265–270 [ Summary ] [ Full Text ]
Variations in the secondary metabolite camptothecin in relation to tissue age and season in Camptotheca acuminata
Zhijun Liu, Stanley B. Carpenter, Wayne J. Bourgeois, Ying Yu, Roysell J. Constantin, Matthew J. Falcon and John C. Adams

Tree Physiology 18:271–276 [ Summary ] [ Full Text ]
Photosynthetic capacity of red spruce during winter
P. G. Schaberg, J. B. Shane, P. F. Cali, J. R. Donnelly and G. R. Strimbeck

Tree Physiology 18:277–280 [ Summary ] [ Full Text ]
Comparative seed ecophysiology of wild and cultivated Carica papaya trees from a tropical rain forest region in Mexico
Leoncio Paz and Carlos Vázquez-Yanes