1. High plating efficiency and plant regeneration frequency in low density protoplast cultures derived from an embryogenic Brassica napus cell suspension

   • Daina H. Simmonds
   • Nancy E. Long
   • Wilfred A. Keller

   OriginalPaper Pages: 231 - 241

2. Callus production from willow (Salix viminalis L.) protoplasts

   • Tiina Vahala
   • Tage Eriksson

   OriginalPaper Pages: 243 - 248

3. Adventitious shoot regeneration from leaf explants of tissue cultured and greenhouse-grown raspberry

   • Johanne C. Cousineau
   • Danielle J. Donnelly

   OriginalPaper Pages: 249 - 255

4. Factors promoting sustained divisions of mesophyll protoplasts isolated from dihaploid clones of potato (Solanum tuberosum L.) and a cytological analysis of regenerated plants

   • Sylvia Waara
   • Anita Wallin
   • Tage Eriksson

   OriginalPaper Pages: 257 - 265

5. l-Phenylalanine ammonia-lyase in suspension culture cells of spruce (Picea abies)

   • Burkhard Messner
   • Meinrad Boll
   • Jürgen Berndt

   OriginalPaper Pages: 267 - 274

6. Improvement of the tissue culture response of seed-derived callus cultures of Poa pratensis L.: Effect of gelling agent and abscisic acid

   • H. F. Van Ark
   • M. A. C. M. Zaal
   • P. Van der Valk

   OriginalPaper Pages: 275 - 280

7. A comparison of BA, zeatin and thidiazuron for adventitious bud formation from Picea glauca embryos and epicotyl explants

   • D. D. Ellis
   • H. Barczynska
   • N. Nelson

   OriginalPaper Pages: 281 - 287

8. Development of four tobacco cytoplasmic male sterile sources using in vitro techniques

   • Violeta Milanova Nikova
   • N. A. Zagorska
   • R. S. Pundeva

   OriginalPaper Pages: 289 - 295

9. In vitro regeneration from excised leaves of Flaveria trinervia (Sprengel) C. Mohr

   • M. S. Sudarshana
   • C. Shanthamma

   OriginalPaper Pages: 297 - 302

10. Root organogenesis from single cells released from the root cap of Medicago sp.

    • Martha C. Hawes
    • Laura Y. Smith
    • Martha Stephenson

    OriginalPaper Pages: 303 - 308

11. The preparation in vitro of chrysanthemum for transplantation to soil

    • Elaine F. Smith
    • Andrew V. Roberts
    • Susan Denness

    OriginalPaper Pages: 309 - 313

12. Influence of nitrogen form and NH₄ ⁺-N/:NO₃ ⁻-N ratios on adventitious shoot formation from pear (Pyrus communis) leaf explants in vitro

    • Hassan Abu-Qaoud
    • R. M. Skirvin
    • F. E. Below

    OriginalPaper Pages: 315 - 319

13. Studies of protoplast culture types and plant regeneration from callusderived protoplasts of Asparagus officinalis L. cv. Lucullus 234

    • Yinghui Dan
    • Christine T. Stephens

    OriginalPaper Pages: 321 - 331

14. Minimal growth in vitro conservation of coffee (Coffea spp.)

    • Anna Bertrand-Desbrunais
    • Michel Noirot
    • André Charrier

    OriginalPaper Pages: 333 - 339

15. Micropropagation of juvenile and adult Sorbus domestica L.

    • Isabel Arrillaga
    • Toni Marzo
    • Juan Segura

    OriginalPaper Pages: 341 - 348