Resting cysts, and effects of temperature and salinity on the growth of vegetative cells of the potentially harmful species Alexandrium insuetum Balech (Dinophyceae) SCIE SCOPUS

Cited 12 time in WEB OF SCIENCE Cited 14 time in Scopus
Title
Resting cysts, and effects of temperature and salinity on the growth of vegetative cells of the potentially harmful species Alexandrium insuetum Balech (Dinophyceae)
Author(s)
Shin, Hyeon Ho; Baek, Seung Ho; Li, Zhun; Han, Myung-Soo; Oh, Seok Jin; Youn, Seok-Hyun; Kim, Young Sug; Kim, Daekyung; Lim, Weol-Ae
KIOST Author(s)
Shin, Hyeon Ho(신현호)Baek, Seung Ho(백승호)
Publication Year
2014-10
Abstract
The potentially harmful species Alexandrium insuetum established by the incubation of resting cysts isolated from sediment trap samples collected at Jinhae-Masan Bay, Korea was characterized by morphological and phylogenetic analysis. The effects of temperature and salinity on the growth of A. insuetum were also investigated. The resting cysts are characterized by a spherical shape, a small size (20-25 mu m) and the presence of either three or four red accumulation bodies. The similarity of morphological features of the resting cysts to those of other species of the minutum group (consisting of Alexandrium minutum and A. tamutum) indicates that the morphological features of resting cysts might improve the accuracy of the grouping of Alexandrium species. A. insuetum germinated from the resting cysts is morphologically consistent with vegetative cells reported from Korean and Japanese coastal areas, and has an partial large subunit (LSU) rDNA sequence identical to that from Japanese strains. The growth of A. insuetum was observed between salinity 20 and 35, with increasing temperature; however at 25 degrees C, A. insuetum could grow even at the salinity of 15. The highest growth rate (0.60 d(-1)) was observed at 25 degrees C and the salinity of 25, which is higher than the previously reported growth rate of A. tamarense, which is responsible for outbreaks of paralytic shellfish poisoining and blooms in Jinhae-Masan Bay. These results suggest that the proliferation of A. insuetum in Jinhae-Masan Bay is likely to be highest during the summer. (C) 2014 Elsevier B.V. All rights reserved.
ISSN
1568-9883
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2706
DOI
10.1016/j.hal.2014.07.012
Bibliographic Citation
HARMFUL ALGAE, v.39, pp.175 - 184, 2014
Publisher
ELSEVIER SCIENCE BV
Subject
SETO INLAND SEA; GENUS ALEXANDRIUM; PHYLOGENETIC-RELATIONSHIPS; LABORATORY CONDITIONS; PSEUDO-NITZSCHIA; TOXIN CONTENT; MASAN BAY; DINOFLAGELLATE; KOREA; CATENELLA
Keywords
Alexandrium insuetum; Resting cyst; Minutum group; Temperature; Salinity
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCIENCE BV
Related Researcher
Research Interests

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

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