1. The biology ofAzospirillum-sugarcane association II. Ultrastructure

   • R. Howard Berg
   • Vimla Vasil
   • Indra K. Vasil

   Original Papers Pages: 143 - 163

2. Fine structure of plasmodial nuclei in the slime moldPhysarum polycephalum I. Comparison of diploid and haploid vegetative mitosis

   • J. J. Wille
   • W. L. Steffens

   Original Papers Pages: 165 - 180

3. Ultrastructural localization of esterase and acid phosphatase in digestive gland cells of fed and starvedCepaea nemoralis (L.) (Mollusca: Helicidae)

   • G. S. Oxford
   • L. J. Fish

   Original Papers Pages: 181 - 196

4. Topochemical studies on the wall of beech bark sclereids by enzymatic and acidic degradation

   • N. Parameswaran
   • M. Sinner

   Original Papers Pages: 197 - 215

5. Cell cycle analysis of tumour-derived cultures ofCrepis capillaris: A kinetic analogy with proliferation of animal tumour cells

   • Sarah E. Ashmore
   • A. R. Gould

   Original Papers Pages: 217 - 230

6. Different structure of polytene chromosomes ofPhaseolus coccineus suspensors during early embryogenesis

   • Laura Maria Costantina Forino
   • Anna Maria Tagliasacchi
   • Silvana Avanzi

   Original Papers Pages: 231 - 246