Reports on Plant Diseases

Figure 4. Life cycle of Polymyxa graminis: (a) mature sporangia with exit tubes passing through cells. Motile zoospores emerging formed from one sporangium; (b) biflagellate zoospores; (c) living amoeboid zoospores; 9d) amoeboid spores during period of active growth; (e) individual plasmodia (meronts); (f) same cell as d after the plasmodia have coalesced; (g) plasmodia just prior to cleavage into incipient cysotsori; (h) cleavage of plasmodia into polygonal resting spores (cystosori); (i) wheat cell completely filled with resting spores. (Adapted from ledingham)

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