1. Phytoalexins and other natural products as factors in plant disease resistance

   • John L. Ingham

   Interpreting Botanical Progress Pages: 343 - 424

2. Anatomy and cytology of microsporogenesis in cytoplasmic male sterile angiosperms

   • Kenneth D. Laser
   • Nels R. Lersten

   OriginalPaper Pages: 425 - 454

3. Carbon dioxide exchange of plants in natural environments

   • Harold A. Mooney

   OriginalPaper Pages: 455 - 469