Plasmodiophorid Sporangial Stages

Sporangial development leads to the formation of thin-walled (zoo)sporangia, which produce secondary zoospores. Cruciform divisions occur in early stages of sporangial development, and noncruciform divisions occur in later stages. There is no evidence at this time that the noncruciform divisions are meiotic divisions as are the noncruciform divisions in sporogenic plasmodia. Sporangial development has not been observed for either Tetramyxa or Membranosorus .

Images of Sporangial Development

• Spongospora sporangial plasmodia, LMG
• Spongospora young plasmodium on potato, TEMG
• Sporangial lobes of Spongospora on potato, TEMG
• Noncruciform divisions in sporangial lobes of Spongospora on potato, TEMG
• Spongospora sporangial lobes with zoospores, TEMG
• Hillenburgia plasmodium on watercress, TEMG
• Cruciform divisions in Hillenburgia sporangial plasmodium on watercress, TEMG
• Cruciform division in Hillenburgia sporangial plasmodium on watercress, TEMG
• Hillenburgia on watercress cruciform division (anaphase), TEMG
• Plasmodiophora young sporangial plasmodium, TEMG
• Plasmodiophora sporangial lobes with zoospores, TEMG