Abstract
In Peridinium inconspicuum Lemmermann, sexual reproduction occurs in both nitrogen‐enriched and nitrogen‐deficient media. In this homothallic strain, protoplasmic fusion begins between two thecate gametes; but zygote formation is completed in a space outside the fusing pair. This diploid cell can form a plated theca which is shed as the cell enlarges. This spherical zygote then forms a new non‐plated theca. The process of ecdysis and the formation of a new non‐plated theca is repeated several times. During this process the zygote gradually elongates and by cytoplasmic infurrowing becomes peanut‐shaped. Eventually two cells are formed.The first and second meiotic divisions are greatly separated in time. The first meiotic division occurs in the spherical non‐thecate zygote. The second meiotic division can occur in the peanut‐shaped zygote before it completes cytokinesis. This meiotic division may not be synchronous, occasionally resulting in a trinucleate stage. Eventually four flagellated, haploid products are produced.
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.
