Figure 13.  The life cycle of Polymyxa graminis. Note that zoospore infection can result in either the production of secondary zoospores or of resting spores. (Images courtesy J.E. Carroll, or reprinted with permission from: Littlefield, L.J., J.H. Whallon, P.J. Doss, and Z.H. Hassan. 1998 Postinfection development of Polymyxa graminis in roots of Triticum aestivum. Mycologia 90: 869-882, © The Mycological Society of America.) BACK