Abstract
Dinoflagellates are known for their development of highly aberrant organelle genetic systems. Both their plastid and mitochondrial genomes are extremely reduced in gene number and rearranged into numerous unconventional genomic elements. Transcription processes are also elaborately modified including extensive RNA editing and trans-splicing. Some dinoflagellates have replaced their original plastid through serial endosymbiotic events. Karlodinium veneficum is such an example that now contains a haptophyte plastid. This tertiary plastid provides a case of a more conventional genetic system introduced into a cellular environment with a known penchant for genetic oddities. Here, we show that K. veneficum plastid transcripts undergo extensive substitutional editing. The substitution types are more diverse than those seen in most other plastids but are similar to those of dinoflagellate organelles. There is no evidence for RNA editing of plastid-encoded transcripts from extant haptophytes, suggesting that K. veneficum plastid editing developed after the uptake of the tertiary endosymbiont.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.