The genus Alexandrium Halim (Dinophyceae) in Korean coastal waters

Title
The genus Alexandrium Halim (Dinophyceae) in Korean coastal waters
Author(s)
Li Zhun; 신현호
KIOST Author(s)
Shin, Hyeon Ho(신현호)
Publication Year
2019-10-18
Abstract
Outbreaks of paralytic shellfish poisoning (PSP) and dense blooms caused by species in Korea coastal waters have been nearly annual events for many years. To identify the species based on detailed morphological characteristics and molecular phylogenetic analysis, vegetative cells collected water samples and established by the incubation of resting cysts isolated from sediment samples were analyzed. Eight Alexandrium species have been were identified based on morphological characteristics and molecular phylogenetic analysis: A. affine, A. catenella, A.concavum, A. fraterculus, A. insuetum, A. leei, A. pacificum and A. pseudogonyaulax. All of the
species has the same plate formula: Po, 4’, 6”, 6c, 7-10s, 5”’, 2””. The resting cysts ranged in shape from spharical (A. affine, A. catenella, A. fraterculus, A. insuetum and A. pseudogonyaulax) to ellipsoidal (A. catenella and A. pacificum). Molecular phylogenetic analysis based on partial large subunit rRNA sequence showed that the grouping of Alexandrium species could be supported by the differences in life-history morphologies and the clade of A. pseudogonyaulax could be a basal lineage of this group. Cultured cells of A. catenella, A. fraterculus, A. pacificum and A. pseudogonyaulax were toxic but A. affine, A. concavum and A. leei clones were non-toxic. This study provides evidence on the presence of PSP toxin-producing Alexandrium species in Korean waters.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/22241
Bibliographic Citation
2019 한국환경생물학회 추계학술대회, 2019
Publisher
한국환경생물학회
Type
Conference
Language
English
Publisher
한국환경생물학회
Related Researcher
Research Interests

Marine bioresource,Marine phytoplankton diversity / ecology,Marine micropaleontology,해양생물자원,해양식물플랑크톤 다양성/생태학,해양미고생물학

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