1. Continuous culture of suspended plant cells

   • H. J. G. ten Hoopen
   • W. M. van Gulik
   • J. J. Heijnen

   Regular Papers Pages: 115 - 120

2. Factors affecting shoot proliferation and vitrification inDigitalis obscura cultures

   • Leonor Lapeña
   • Pedro Pérez-Bermúdez
   • Juan Segura

   Regular Papers Pages: 121 - 124

3. Development of white spruce somatic embryos: II. Continual shoot meristem development during germination

   • Lisheng Kong
   • Edward C. Yeung

   Regular Papers Pages: 125 - 131

4. Callus regeneration from cotyledon protoplasts ofChamaecyparis obtusa (Hinoki cypress)

   • Hamako Sasamoto
   • Akira Kondo
   • Keiji Odani

   Regular Papers Pages: 132 - 136

5. Somatic embryogenesis from cell suspension and protoplast cultures ofCapsella bursa-pastoris (L.) Medic

   • A. C. Bonfils
   • S. C. Gleddie
   • W. A. Keller

   Regular Papers Pages: 137 - 142

6. Protective systems against activated oxygen species compared in normal and fully habituated nonorganogenic sugarbeet calluses

   • Daniel Hagège
   • Claire Kevers
   • Thomas Gaspar

   Regular Papers Pages: 143 - 147

7. Kiwifruit micropropagation through callus shoot-bud induction

   • Manuel Rey
   • Teresa Fernández
   • Roberto Rodriguez

   Regular Papers Pages: 148 - 152

8. Somatic embryogenesis in soybean via somatic embryo cycling

   • Wennuan Liu
   • Patricia J. Moore
   • Glenn B. Collins

   Regular Papers Pages: 153 - 160