Strain number NIES-10  
Phylum Heterokontophyta  
Class Raphidophyceae  
Scientific name Heterosigma akashiwo (Hada) Hada ex Y.Hara & Chihara  
Synonym Entomosigma akashiwo Y.Hada; Chattonella akashiwo (Y.Hada) Loeblich III 1979; Olisthodiscus carterae Hulburt 1965; Heterosigma inlandica Hada 1968; Chattonella inlandica (Y.Hada) Loeblich III & Fine 1977; Heterosigma carterae (Hulbert) F.J.R.Taylor 1992  
Former name  
Common name  
Locality (Date of collection) Harima-Nada, Seto Inland Sea Japan (1983-02-**)  
Latitude / Longitude  
Habitat (Isolation source) Marine (Sediment)  
History < Watanabe, Makoto M.  
Isolator (Date of isolation) Watanabe, Makoto M. (1983-05-**)  
Identified by Watanabe, Makoto M.  
State of strain Subculture; Unialgal; Clonal; Axenic[2018 Feb]  
Culture condition
(Preculture condition)
Medium:  f/2  
Temperature:  20 C
Light intensity:  32-40 µmol photons/m2/sec, L/D cycle:  10L:14D
Duration:  1 M  
Gene information CO1 ( AB334436 ) , rbcL ( AB334436 )  
Cell size (min - max) - 15 μm  
Organization Unicellular; Flagellate 
Characteristics Red tide  
Other strain no. Other strain no. : H-40  
Remarks Fragile species to transportation stresses; Read and agree "How to order 4.1"; Axenic 
Movie  
Reference
Yamasaki, Y., Fujita, M., Kawano, S., Baba, T. 2018 Effect of salinity on interspecific competition between the dinoflagellate Alexandrium catenella and the raphidophyte Heterosigma akashiwo. Aquat. Microb. Ecol., 81, 73-82.
Keywords: Allelopathy; Cell contact; Hemolytic activity; Growth inhibition; Heterosigma akashiwo; Alexandrium catenella; Bi-algal culture
Strain(s): 10 
DOI: 10.3354/ame01860

Qiu, X., Shimasaki, Y., Yoshida, Y., Matsubara, T., Yamasaki, Y., Kawaguchi, M., Honda, M., Mouri, K., Nakajima, Y., Tasmin, R., Kuno, K., Kawamura, Y., Honjo, T., Oshima, Y. 2014 Allelopathic effects of Skeletonema spp. may influence interspecific competition and bloom formation of co–occurring harmful flagellates. J. Fac. Agr., Kyushu Univ., 59, 373-382.
Strain(s): 110324 

Qiu, XC., Yamasaki, Y., Shimasaki, Y., Gunjikake, H., Honda, M., Kawagushi, M., Matsubara, T., Nagasoe, S., Etoh, T., Matsui, S., Honjo, T., Oshima, Y. 2012 Allelopathy of the raphidophyte Heterosigma akashiwo against the dinoflagellate Akashiwo sanguinea is mediated via allelochemicals and cell contact. Mar. Ecol. Prog. Ser., 446, 107-118.
Keywords: Heterosigma akashiwo; Akashiwo sanguinea; Allelopathy; Polysaccharide−protein complex; Cell contact; Growth interaction; Growth simulation
Strain(s): 10324 
DOI: 10.3354/meps09476

Yamasaki, Y., Ohmichi, Y., Hirose, M., Shikata, T., Shimasaki, Y., Oshima, Y., Honjo, T. 2012 Low molecular weight allelochemicals produced by the diatom, Skeletonema costatum. Thalassas, 28, 9-17.
Keywords: Allelochemicals; Diatom; Growth inhibition; Heterosigma akashiwo; Raphidophyt; Skeletonema costatum
Strain(s): 10324 

Yamasaki, Y., Nagasoe, S., Tameishi, M., Shikata, T., Zou, Y., Jiang, Z., Matsubara, T., Shimasaki, Y., Yamaguchi, K., Oshima, Y., Honjo, T. 2010 The role of interactions between Prorocentrum minimum and Heterosigma akashiwo in bloom formation. Hydrobiologia, 641, 33-44.
Keywords: Allelopathy; growth and interaction; Heterosigma akashiwo; Prorocentrum minimum; Reactive oxygen species; Skeletonema costatum
Strain(s): 110324 
DOI: 10.1007/s10750-009-0052-y

Yamasaki, Y., Ohmichi, Y., Shikata, T., Hirose, M., Shimasaki, Y., Oshima, Y., Honjo, T. 2010 Species-specific allelopathic effects of the diatom Skeletonema costatum. Thalassas, 27, 21-32.
Keywords: Allelopathy; growth inhibition; growth promotion; Heterosigma akashiwo; low molecular weight allelochemicals; Skeletonema costatum; species-specific effect
Strain(s): 10324 

Demura, M., Noël, M.-H., Kasai, F., Watanabe, M. M., Kawachi, M. 2009 Taxonomic revision of Chattonella antiqua, C. marina and C. ovata (Raphidophyceae) based on their morphological characteristics and genetic diversity. Phycologia, 48, 518-535.
Keywords: Chattonella antiqua; Chattonella marina; Chattonella ovata; COI; COX1; Genetic diversity; ITS; Microsatellite; Morphology; Phylogeny; Population; Raphidophyceae; rbcL; Speciation; Taxonomy
Strain(s): 123569101483848511311411611814514616129355756160367171684919741975197619771978198019811982198319841986238323842385238623872388238923912392239323942395239623972398239924002401240224032404240524062407 
DOI: 10.2216/08-98.1

Yamasaki, Y., Shikata, T., Nukata, A., Ichiki, S., Nagasoe, S., Matsubara, T., Shimasaki, Y., Nakao, M., Yamaguchi, K., Oshima, Y., Oda, T., Ito, M., Jenkinson, I. R., Asakawa, M., Honjo, T. 2009 Extracellular polysaccharide-protein complexes of a harmful alga mediate the allelopathic control it exerts within the phytoplankton community. ISME J., 3, 808-817.
Keywords: allelopathy; growth inhibition; growth stimulation; harmful algal blooms (HABs); Heterosigma akashiwo; Skeletonema costatum
Strain(s): 10324 
DOI: 10.1038/ismej.2009.24

Yamasaki, Y., Nagasoe, S., Matsubara, T., Shikata, T., Shimasaki, Y., Oshima, Y., Honjo, T. 2007 Allelopathic interactions between the bacillariophyte Skeletonema costatum and the raphidophyte Heterosigma akashiwo. Mar. Ecol. Prog. Ser., 339, 83-92.
Keywords: Allelopathy; Bacillariophyceae; Skeletonema costatum; Raphidophyceae; Heterosigma akashiwo; Bi-algal culture; Growth inhibition
Strain(s): 10324 

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