1. Interspecific crosses between Tulipa gesneriana cultivars and wild Tulipa species: a survey

   • J. P. Van Eijk
   • L. W. D. Van Raamsdonk
   • R. J. Bino

   Original Articles Pages: 1 - 5

2. The actin cytoskeleton in unfixed pollen tubes following microwave-accelerated DMSO-permeabilisation and TRITC-phalloidin staining

   • J. Heslop-Harrison
   • Y. Heslop-Harrison

   Original Articles Pages: 6 - 11

3. In vitro fertilization of single, isolated gametes of maize mediated by electrofusion

   • E. Kranz
   • J. Bautor
   • H. Lörz

   Original Articles Pages: 12 - 16

4. Electrofusion-mediated transmission of cytoplasmic organelles through the in vitro fertilization process, fusion of sperm cells with synergids and central cells, and cell reconstitution in maize

   • E. Kranz
   • J. Bautor
   • H. Lörz

   Original Articles Pages: 17 - 21

5. Microsporogenesis in a normal line and in the ogu cytoplasmic male-sterile line of Brassica napus

   • P. L. Polowick
   • V. K. Sawhney

   Original Articles Pages: 22 - 27

6. Secretory tapetum of Brassica oleracea L.: polarity and ultrastructural features

   • M. Murgia
   • M. Charzynska
   • M. Cresti

   Original Articles Pages: 28 - 35

7. Calcium uptake from the stigma by germinating pollen in Primula officinalis L. and Ruscus aculeatus L.

   • E. Bednarska

   Original Articles Pages: 36 - 38

8. Pistil hyperplasia in rice spikelets as affected by heat stress

   • Y. Takeoka
   • K. Hiroi
   • T. Wada

   Original Articles Pages: 39 - 43

9. Genotypic effects on pollen morphology in sesame (Sesamum indicum L.)

   • Paul L. Pfahler
   • Elizabeth K. Pfahler

   Original Articles Pages: 44 - 47

10. Microspore-derived embryos in Brassica: the significance of division symmetry in pollen mitosis I to embryogenic development

    • M. A. M. Zaki
    • H. G. Dickinson

    Original Articles Pages: 48 - 55

11. Parental effects on growth in Solanum conditioned at multiple levels

    • Paul Grun

    Original Articles Pages: 56 - 63

12. Histological and semi-quantitative approaches to in vitro cellular responses of ovule, embryo and endosperm in sugar beet, Beta vulgaris L.

    • Lone Bruun

    Original Articles Pages: 64 - 72