1. Oligomerization of profilins from birch, man and yeast. Profilin, a ligand for itself?

   • Irene Mittermann
   • Jacquelyn S. Fetrow
   • R. Valenta

   ORIGINAL PAPER Pages: 183 - 191

2. Identification and cloning of related self-incompatibility S-genes in Papaver rhoeas and Papaver nudicaule

   • S. Kurup
   • J. P. Ride
   • F. Christopher H. Franklin

   ORIGINAL PAPER Pages: 192 - 198

3. MEI1, an Arabidopsis gene required for male meiosis: isolation and characterization

   • Caiping He
   • J. P. Mascarenhas

   ORIGINAL PAPER Pages: 199 - 207

4. Reproductive biology of a rare cactus, Opuntia spinosissima (Cactaceae), in the Florida Keys: why is seed set very low?

   • V. Negrón-Ortiz

   ORIGINAL PAPER Pages: 208 - 212

5. Sexual and apomictic development in Hieracium

   • A. M. Koltunow
   • Susan D. Johnson
   • Ross A. Bicknell

   ORIGINAL PAPER Pages: 213 - 230

6. Role of 1,4,5-inositol triphosphate-induced Ca²⁺ release in pollen tube orientation

   • Rui Malhó

   SHORT COMMUNICATION Pages: 231 - 235

7. The Men-10 cDNA encodes a novel form of proline-rich protein expressed in the tapetum of dioecious Silene latifolia

   • Charles P. Scutt
   • P. M. Gilmartin

   SHORT COMMUNICATION Pages: 236 - 240