Life Cycle of the pseudocolonial dinoflagellate Polykrikos kofoidii (Gymnodiniales, Dinoflagellata)

© 2013 Phycological Society of America.

Bibliographische Detailangaben
Veröffentlicht in:Journal of phycology. - 1966. - 49(2013), 2 vom: 23. Apr., Seite 298-317
1. Verfasser: Tillmann, Urban (VerfasserIn)
Weitere Verfasser: Hoppenrath, Mona
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Journal of phycology
Schlagworte:Journal Article Polykrikos kofoidii cysts hatching dinoflagellate gamete life cycle nuclear cyclosis
LEADER 01000naa a22002652 4500
001 NLM258725400
003 DE-627
005 20231224185633.0
007 cr uuu---uuuuu
008 231224s2013 xx |||||o 00| ||eng c
024 7 |a 10.1111/jpy.12037  |2 doi 
028 5 2 |a pubmed24n0862.xml 
035 |a (DE-627)NLM258725400 
035 |a (NLM)27008517 
040 |a DE-627  |b ger  |c DE-627  |e rakwb 
041 |a eng 
100 1 |a Tillmann, Urban  |e verfasserin  |4 aut 
245 1 0 |a Life Cycle of the pseudocolonial dinoflagellate Polykrikos kofoidii (Gymnodiniales, Dinoflagellata) 
264 1 |c 2013 
336 |a Text  |b txt  |2 rdacontent 
337 |a ƒaComputermedien  |b c  |2 rdamedia 
338 |a ƒa Online-Ressource  |b cr  |2 rdacarrier 
500 |a Date Completed 25.03.2016 
500 |a Date Revised 24.03.2016 
500 |a published: Print-Electronic 
500 |a Citation Status PubMed-not-MEDLINE 
520 |a © 2013 Phycological Society of America. 
520 |a The athecate, pseudocolonial polykrikoid dinoflag-ellates show a greater morphological complexity than many other dinoflagellate cells and contain not only elaborate extrusomes but sulci, cinguli, flagellar pairs, and nuclei in multiple copies. Among polykrikoids, Polykrikos kofoidii is a common species that plays an important role as a grazer of toxic planktonic algae but whose life cycle is poorly known. In this study, the main life cycle stages of P. kofoidii were examined and documented for the first time. The formation of gametes, 2-zooid-1-nucleus stages very different from vegetative cells, was observed and the process of gamete fusion, isogamy, was recorded. Karyogamy followed shortly after completed plasmogamy. A complex reorganization of furrows (cinguli and sulci) and flagella followed zygote formation, resulting in a 4-zooid zygote with one nucleus. The fate of zygotes under different nutritional conditions was also investigated; well-fed zygotes were able to reenter the vegetative cycle via meiotic divisions as indicated by nuclear cyclosis. However, nuclear cyclosis was preceded by a presumably mitotic division of the primary zygote nucleus which by definition would imply that P. kofoidii has a diplohaplontic life cycle. Nuclear cyclosis in germlings hatched from spiny resting cysts indicate that these cysts are of zygote origin (hypnozygotes). Hypnozygote formation, cyst hatching, the morphology of the germling (a 1-zooid cell), and its development into a normal pseudocolony are documented here for the first time. There is evidence that P. kofoidii has a system of complex heterothallism 
650 4 |a Journal Article 
650 4 |a Polykrikos kofoidii 
650 4 |a cysts hatching 
650 4 |a dinoflagellate 
650 4 |a gamete 
650 4 |a life cycle 
650 4 |a nuclear cyclosis 
700 1 |a Hoppenrath, Mona  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Journal of phycology  |d 1966  |g 49(2013), 2 vom: 23. Apr., Seite 298-317  |w (DE-627)NLM098182994  |x 1529-8817  |7 nnns 
773 1 8 |g volume:49  |g year:2013  |g number:2  |g day:23  |g month:04  |g pages:298-317 
856 4 0 |u http://dx.doi.org/10.1111/jpy.12037  |3 Volltext 
912 |a GBV_USEFLAG_A 
912 |a SYSFLAG_A 
912 |a GBV_NLM 
912 |a GBV_ILN_21 
912 |a GBV_ILN_40 
912 |a GBV_ILN_72 
912 |a GBV_ILN_176 
912 |a GBV_ILN_350 
951 |a AR 
952 |d 49  |j 2013  |e 2  |b 23  |c 04  |h 298-317