1. Effects of ozone on starch accumulation in Norway spruce (Picea abies)

   • Barbara Luethy-Krause
   • Werner Landolt

   Original Articles Pages: 107 - 110

2. “Natural” and NH₃-induced variation in epicuticular needle wax morphology of Pseudotsuga menziesii (Mirb.) Franco

   • Gerard Thijsse
   • Pieter Baas

   Original Articles Pages: 111 - 119

3. Ultrastructure of poplar cortical cells during the transition from growing to wintering stages and vice versa

   • Shonosuke Sagisaka
   • Minoru Asada
   • Young Hee Ahn

   Original Articles Pages: 120 - 127

4. Influence of phloem transport on flower abscission in Hibiscus rosa-sinensis

   • Doris Krabel
   • Walter Eschrich

   Original Articles Pages: 128 - 135

5. Tubule bundle-inclusions in vacuoles of Tamarix aphylla L. mesophyll cells

   • Artemios M. Bosabalidis

   Original Articles Pages: 136 - 141

6. Respiration rate of male and female cones of Pinus contorta

   • Janet McP. Dick
   • Ron Smith
   • Paul G. Jarvis

   Original Articles Pages: 142 - 149

7. Endogenous levels of oxygen, carbon dioxide and ethylene in stems of Norway spruce trees during one growing season

   • Leif Eklund

   Original Articles Pages: 150 - 154

8. Tissue water relations in elfin cloud forest tree species of Serrania de Macuira, Guajira, Colombia

   • Jaime Cavelier

   Original Articles Pages: 155 - 163

9. Nauclea diderrichii: rooting of stem cuttings, clonal variation in shoot dominance, and branch plagiotropism

   • R. R. B. Leakey

   Original Articles Pages: 164 - 169