1. Some permeability properties of angiosperm pollen grains, pollen tubes and generative cells

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

   Original Articles Pages: 65 - 73

2. Structure and function of the microtubular cytoskeleton during megasporogenesis and embryo sac development in Gasteria verrucosa (Mill.) H. Duval

   • M. T. M. Willemse
   • A. A. M. Van Lammeren

   Original Articles Pages: 74 - 82

3. Rhodamine-phalloidin staining of F-actin in pollen after dimethylsulphoxide permeabilization

   • Elisabeth S. Pierson

   Original Articles Pages: 83 - 87

4. Ultrastructural features of Aloe ciliaris pollen

   • F. Ciampolini
   • A. Moscatelli
   • M. Cresti

   Original Articles Pages: 88 - 96

5. Isolated generative cells in some angiosperms: a further study

   • C. Zhou
   • K. Orndorff
   • A. E. DeMaggio

   Original Articles Pages: 97 - 102

6. Development of subprotoplasts from in vitro-grown tobacco pollen tubes

   • M. Kroh
   • B. Knuiman

   Original Articles Pages: 103 - 113

7. Comparative analysis of stamen polypeptides of a rapeseed cultivar, Regent, a CMS polima line, and temperature-restored male-fertile polima line

   • P. Pi
   • R. D. Hill
   • R. Scarth

   Original Articles Pages: 114 - 118

8. Effect of three pollination methods on embryo development and seedset in intra- and interspecific crosses between seven Lilium species

   • J. M. Van Tuyl
   • T. P. Straathof
   • A. A. M. Kwakkenbos

   Original Articles Pages: 119 - 123