[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.4490/algae.2021.36.8.27

Amphidinium stirisquamtum sp. nov. (Dinophyceae), a new marine sand-dwelling dinoflagellate with a novel type of body scale

Luo, Zhaohe (Third Institute of Oceanography, Ministry of Natural Resources)
Wang, Na (Third Institute of Oceanography, Ministry of Natural Resources)
Mohamed, Hala F. (Third Institute of Oceanography, Ministry of Natural Resources)
Liang, Ye (School of Marine Sciences, Nanjing University of Information Science and Technology)
Pei, Lulu (Third Institute of Oceanography, Ministry of Natural Resources)
Huang, Shuhong (Third Institute of Oceanography, Ministry of Natural Resources)
Gu, Haifeng (Third Institute of Oceanography, Ministry of Natural Resources)

Publication Information

ALGAE / v.36, no.4, 2021 , pp. 241-261 More about this Journal

Abstract

Amphidinium species are amongst the most abundant benthic dinoflagellates in marine intertidal sandy ecosystems. Some of them produce a variety of bioactive compounds that have both harmful effects and pharmaceutical potential. In this study, Amphidinium cells were isolated from intertidal sand collected from the East China Sea. The two strains established were subjected to detailed examination by light, and scanning and transmission electron microscopy. The vegetative cells had a minute, irregular, and triangular-shaped epicone deflected to the left, thus fitting the description of Amphidinium sensu stricto. These strains are distinguished from other Amphidinium species by combination characteristics: (1) longitudinal flagellum inserted in the lower third of the cell; (2) icicle-shaped scales, 276 ± 17 nm in length, on the cell body surface; (3) asymmetrical hypocone with the left side longer than the right; and (4) presence of immotile cells. Therefore, they are described here as Amphidinium stirisquamtum sp. nov. The molecular tree inferred from small subunit rRNA, large subunit rRNA, and internal transcribed spacer-5.8S sequences revealed that A. stirisquamtum is grouped together with the type species of Amphidinium, A. operculatum, in a fully supported clade, but is distantly related to other Amphidinium species bearing body scale. Live A.stirisquamtum cells greatly affected the survival of rotifers and brine shrimp, their primary grazers, making them more susceptible to predation by the higher tropic level consumers in the food web. This will increase the risk of introducing toxicity, and consequently, the bioaccumulation of toxins through marine food webs.

Keywords

benthic-epiphytic dinoflagellate; food chain; harmful algae; phylogeny; toxin;

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Times Cited By KSCI : 1 (Citation Analysis)

Reference
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