1. Response of leaf surfaces and gas exchange to wind stress and acid mist in birch (Betula pubescens)

   • S. P. Hoad
   • A. Marzoli
   • C. E. Jeffree

   ORIGINAL ARTICLE Pages: 1 - 12

2. Effect of ozone and sulphur dioxide on membrane enzyme activities of Pinus sylvestris needles

   • Elena Toll
   • Pierre Crespi
   • F. J. Castillo

   ORIGINAL ARTICLE Pages: 13 - 18

3. Climate-tree-growth relationships of Scots pine stands (Pinus sylvestris L.) exposed to soil dryness

   • W. Oberhuber
   • M. Stumböck
   • Werner Kofler

   ORIGINAL ARTICLE Pages: 19 - 27

4. Genetic variation and productivity of Populus trichocarpa and its hybrids. X. Trait correlations in young black cottonwood from four river valleys in Washington

   • J. M. Dunlap
   • R. F. Stettler

   ORIGINAL ARTICLE Pages: 28 - 39

5. Changes in radial tree growth for Picea abies, Larix decidua, Pinus cembra and Pinus uncinata near the alpine timberline since 1750

   • Christian Rolland
   • Véronique Petitcolas
   • R. Michalet

   ORIGINAL ARTICLE Pages: 40 - 53

6. Ontogeny of proventitious epicormic buds in Quercus petraea. I. In the 5 years following initiation

   • F. Fontaine
   • Jean-Louis Druelle
   • Jean-Claude Audran

   ORIGINAL ARTICLE Pages: 54 - 62