1. Adventitions shoot formation on excised leaves of in vitro grown shoots of apple cultivars

   • Francesca Fasolo
   • Richard H. Zimmerman
   • Ingrid Fordham

   General Paper Pages: 75 - 87

2. Influence of 2-deoxy-D-glucose upon growth and invertase activity of carrot (Daucus carota L.) cell suspension cultures

   • John R. Stommel
   • Philipp W. Simon

   General Paper Pages: 89 - 102

3. Norway spruce somatic embryogenesis: high-frequency initiation from light-cultured mature embryos

   • Shirley A. Verhagen
   • Steven R. Wann

   General Paper Pages: 103 - 111

4. Callus induction and plant regeneration from excised zygotic embryos of the seed-propagated yams Dioscorea composita Hemsl. and D. cayenensis Lam.

   • Ana Maria Viana
   • Sinclair H. Mantell

   General Paper Pages: 113 - 122

5. Morphogenesis and tissue cultures of three citrus species

   • N. Duran-Vila
   • V. Ortega
   • L. Navarro

   Short Communication Pages: 123 - 133

6. Enhanced seed development in the interspecific cross Allium cepa x A. sphaerocephalon through ovary culture

   • Raoul J. Bino
   • Maria G. Janssen
   • Jaap N. De Vries

   Short Communication Pages: 135 - 142

7. Classification of abstracts

   Abstract Section Pages: 143 - 143

8. List of journals searched

   Abstract Section Pages: 143 - 143

9. Abstracts

   Abstract Section Pages: A17 - A30