Lack of mixotrophy in three Karenia species and the prey spectrum of Karenia mikimotoi (Gymnodiniales, Dinophyceae)
- Title
- Lack of mixotrophy in three Karenia species and the prey spectrum of Karenia mikimotoi (Gymnodiniales, Dinophyceae)
- Author
- 옥진희
- Keywords
- feeding; harmful algal bloom; Kareniaceae; lysis; protist; red tide; trophic mode
- Issue Date
- 2023-03
- Publisher
- KOREAN SOC PHYCOLOGY
- Citation
- ALGAE
- Abstract
- Exploring mixotrophy of dinoflagellate species is critical to understanding red-tide dynamics and dinoflagellate evolution. Some species in the dinoflagellate genus Karenia have caused harmful algal blooms. Among 10 Karenia species, the
mixotrophic ability of only two species, Karenia mikimotoi and Karenia brevis, has been investigated. These species have
been revealed to be mixotrophic; however, the mixotrophy of the other species should be explored. Moreover, although
K. mikimotoi was previously known to be mixotrophic, only a few potential prey species have been tested. We explored
the mixotrophic ability of Karenia bicuneiformis, Karenia papilionacea, and Karenia selliformis and the prey spectrum of
K. mikimotoi by incubating them with 16 potential prey species, including a cyanobacterium, diatom, prymnesiophyte,
prasinophyte, raphidophyte, cryptophytes, and dinoflagellates. Cells of K. bicuneiformis, K. papilionacea, and K. selliformis did not feed on any tested potential prey species, indicating a lack of mixotrophy. The present study newly discovered
that K. mikimotoi was able to feed on the common cryptophyte Teleaulax amphioxeia. The phylogenetic tree based on
the large subunit ribosomal DNA showed that the mixotrophic species K. mikimotoi and K. brevis belonged to the same
clade, but K. bicuneiformis, K. papilionacea, and K. selliformis were divided into different clades. Therefore, the presence
or lack of a mixotrophic ability in this genus may be partially related to genetic characterizations. The results of this study
suggest that Karenia species are not all mixotrophic, varying from the results of previous studies.
- URI
- https://information.hanyang.ac.kr/#/eds/detail?an=edskci.ARTI.10221164&dbId=edskcihttps://repository.hanyang.ac.kr/handle/20.500.11754/189859
- ISSN
- 2093-0860; 1226-2617
- DOI
- 10.4490/algae.2023.38.2.28
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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