Alexandrium catenella (Group I) and A. pacificum (Group IV) cyst germination, distribution, and toxicity in Jinhae-Masan Bay, Korea SCIE SCOPUS

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Title
Alexandrium catenella (Group I) and A. pacificum (Group IV) cyst germination, distribution, and toxicity in Jinhae-Masan Bay, Korea
Author(s)
Shin, Hyeon Ho; Li, Zhun; Kim, Hyun Jung; Park, Bum Soo; Lee, Ji Hoon; Shin, A Young; Park, Tae-Gyu; Lee, Kyun Woo; Han, Kyong Ha; Youn, Joo Yeon; Kwak, Kyeong Yoon; Seo, Min Ho; Kim, Daekyung; Son, Moon Ho; Kim, Dug Jin; Shin, Kyoung Soon; Lim, Weol-Ae
KIOST Author(s)
Kim, Hyun Jung(김현정)Park, Bum Soo(박범수)Lee, Ji Hoon(이지훈)Shin, A Young(신아영)Han, Kyong Ha(한경하)Youn, Joo Yeon(윤주연)Kwak, Kyeong Yoon(곽경윤)Kim, Dug Jin(김덕진)Shin, Kyoung Soon(신경순)
Alternative Author(s)
신현호; 김현정; 박범수; 이지훈; 신아영; 이균우; 한경하; 윤주연; 곽경윤; 김덕진; 신경순
Publication Year
2021-12
Abstract
To better understand the outbreaks of paralytic shellfish poisoning and bloom dynamics caused by Alexandrium species in Jinhae-Masan Bay, Korea, the germination and distributions of ellipsoidal Alexandrium cysts were investigated, and paralytic shellfish toxins (PSTs) profiles and contents were determined using strains established from germling cells. The phylogeny and morphological observations revealed that the germinated vegetative cells from ellipsoidal cysts collected from the surface sediments in Jinhae-Masan Bay belong to Alexandrium catenella (Group I) and A. pacificum (Group IV) nested within A. tamarense species complex. Cyst germinations of A. catenella (Group I) were observed at only 10 °C, whereas cysts of A. pacificum (Group IV) could germinate at temperature ranges of 10 to 25 °C. Maximum germination success (85%) for isolated cysts occurred at 15 °C, and the germling cells were A. pacificum (Group IV). The results indicate that the variation in water temperature in Jinhae-Masan Bay can control the seasonal variations in germination of cysts of A. catenella (Group I) and A. pacificum (Group IV). The germination rates of ellipsoidal Alexandrium cysts were different among sampling sites in Jinhae-Masan Bay, probably because of differences in distribution and abundance of A. catenella (Group I) and A. pacificum (Group IV) in the sediments. The ellipsoidal Alexandrium cyst concentrations were much higher in February than in August, however the distributions were similar. Gonyautoxins 3 and 4 (GTX-3 and GTX-4) contributed a large proportion (>90%) of the toxins produced by strains A. catenella (Group I) and A. pacificum (Group IV) established from germling cells, and the total cellular contents were higher in A. catenella (Group I) than in A. pacificum (Group IV).
ISSN
1568-9883
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41658
DOI
10.1016/j.hal.2021.102122
Bibliographic Citation
Harmful Algae, v.110, 2021
Publisher
Elsevier BV
Keywords
Germination temperature; Ellipsoidal alexandrium cyst; Morphology; Phylogeny; GTX-3; GTX-4
Type
Article
Language
English
Document Type
Article
Publisher
Elsevier BV
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