1. Society news

   News Pages: ix - x

2. Calendar of events

   Events Pages: xi - xii

3. Biotechnology in the Americas II: Applications in tropical agriculture

   • Dvid Pimentel

   Reviews And Perspectives Pages: 151 - 159

4. A procedure for plant regeneration from immature cotyledon tissue of soybean

   • Paul A. Lazzeri
   • David F. Hildebrand
   • Glenn B. Collins

   Experimental Protocols Pages: 160 - 168

5. A method for high-frequency DNA-mediated transformation of plant protoplasts

   • C. Waldron
   • S. K. Malcolm
   • J. L. Roberts

   Experimental Protocols Pages: 169 - 173

6. Selection of probes for restriction fragment length analysis from plant genomic clones

   • B. S. Landry
   • R. W. Michelmore

   Experimental Protocols Pages: 174 - 179

7. Chlorella viruses

   • Russel H. Meints
   • Anne M. Schuster
   • James L. Van Etten

   Genetic Resources Pages: 180 - 187

8. Book review

   • Peter Starlinger

   BookReview Pages: 188 - 189