Abstract
Cleavage of the multinucleate sporangial cytoplasm begins by a rearrangement and subsequent fusion of randomly dispersed cleavage vesicles. The vesicles line up in planes equidistant from neighboring nuclei and along the sporangial wall. In addition, they contribute to the enlargement of the central vacuole. Fusion of these vesicles with themselves and with the central vacuole cleaves the cytoplasm into uninucleate zoospores, each with two flagella. The sporangial wall consists of two layers, an outer thin one which is continuous over the plug of the discharge pore and an inner thick one which tapers off near the plug. The plug consists of fibrillar material and is ejected upon release of the zoospores. A plug‐like structure separating the forming sporangium from the hypha has a homogeneous matrix pervaded with an anastomosing network of fine electron‐dense channels. In addition, glycogen‐like granules occur within mitochondria and paired structures are interpreted as procentrioles.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
