Association of microbodies, Woronin bodies, and septa in intercellular hyphae of Cymadothea trifolii

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Abstract
This ultrastructural study describes the origin of Woronin bodies from microbodies in intercellular hyphae of the plant pathogen Cymadothea trifolii. In this fungus the development of Woronin bodies begins with the appearance of electron-dense material within the microbody. Subsequently, this material is confined to a developing evagination of the delimiting microbody membrane. Eventually the protrusion containing the electron-dense material is released as a Woronin body via an exocytotic mechanism. Woronin bodies are frequently found near septal pores and probably contribute to the formation of septal pore plugs.

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