1. Ultrastructural features of pollen tubes of Endymion non-scriptus modified by cytochalasin D

   • J. Heslop-Harrison
   • Y. Heslop-Harrison
   • F. Ciampolini

   Original Articles Pages: 73 - 80

2. Primary structural features of the self-incompatibility protein in solanaceae

   • T. R. Ioerger
   • J. R. Gohlke
   • T. -H. Kao

   Original Articles Pages: 81 - 87

3. A novel approach to differentiated embryos in the absence of endosperm

   • F. Matzk

   Original Articles Pages: 88 - 94

4. Ultrastructural study on the stylar transmitting tissue in Japanese pear

   • T. M. Nakanishi
   • N. Saeki
   • T. Ichii

   Original Articles Pages: 95 - 103

5. Responses of tobacco pollen to high humidity and heat stress: viability and germinability in vitro and in vivo

   • K. R. Shivanna
   • H. F. Linskens
   • M. Cresti

   Original Articles Pages: 104 - 109

6. Influence of the pH of the stigmatic exudate on male-female interaction in Rosa hybrida L

   • S. Gudin
   • L. Arene

   Original Articles Pages: 110 - 112

7. Influence of season on rose pollen quality

   • S. Gudin
   • L. Arene
   • C. Bulard

   Original Articles Pages: 113 - 117

8. A statistical analysis of some genetical, physiological and anatomical parameters of the development of in situ- and in vitro-grown ovules from intra- and interspecific crosses in the genus Beta

   • Lone Brunn

   Original Articles Pages: 118 - 125

9. Order of fertilization within the ovary in Phaseolus coccineus L. (Leguminosae)

   • O. J. Rocha
   • A. G. Stephenson

   Original Articles Pages: 126 - 131

10. Mitosis and microtubule organizational changes in isolated generative cells of Allemanda neriifolia

    • S. Y. Zee
    • Aziz-Un-Nisa

    Original Articles Pages: 132 - 137

11. Electrotropism of pollen tubes of camellia and other plants

    • N. Nakamura
    • A. Fukushima
    • H. Suzuki

    Original Articles Pages: 138 - 143

12. Announcements

    Announcement Pages: 144 - 144