Strain number NIES-2137  
Phylum Rhodophyta  
Class Cyanidiophyceae  
Scientific name Cyanidium caldarium (Tilden) Geitler  
Former name  
Common name Red alga  
Locality (Date of collection) Nikko-Yumoto Hot spring, Nikko, Tochigi, Japan  
Latitude / Longitude  
Habitat (Isolation source) Hot spring  
History < IAM (2007) < Nagashima, Hideyuki (1991)  
Isolator (Date of isolation) Fukuda, I. (1958-**-**)  
Identified by Fukushima, Hiroshi; Nagashima, Hideyuki  
State of strain Subculture; Unialgal; Clonal; Axenic[2018 Jan]  
Culture condition
(Preculture condition)
Medium:  M-Allen  
Temperature:  37 C
Light intensity:  5-11 µmol photons/m2/sec, L/D cycle:  10L:14D
Duration:  5 M  
Gene information  
Cell size (min - max) 2 - 4 μm  
Organization Unicellular 
Other strain no. Other collection strain no. : IAM R-11
Other strain no. : RK-1  
Remarks Axenic 
Mikulic, P., Beardall, J. 2021 Oxidative and anti-oxidative responses to metal toxicity in an extremophilic alga (Cyanidium caldarium) and a neutrophilic alga (Chlamydomonas reinhardtii). Phycologia, 60, 513-523.
Keywords: Oxidative stress; Reactive oxygen species (ROS); Zinc toxicity
Strain(s): 2137 
DOI: 10.1080/00318884.2021.1984044

Hirooka, S., Tomita, R., Fujiwara, T., Ohnuma, M., Kuroiwa, H., Kuroiwa, T., Miyagishima, S. 2020 Efficient open cultivation of cyanidialean red algae in acidified seawater. Sci Rep, 10, 13794 (article ID).
Strain(s): 21373377 
PubMed: 32839467
DOI: 10.1038/s41598-020-70398-z

Takaichi, S., Yokoyama, A., Mochimaru, M., Uchida, H., Murakami, A. 2016 Carotenogenesis diversification in phylogenetic lineages of Rhodophyta. J. Phycol., 52, 329-338.
Keywords: alloxanthin; antheraxanthin; carotenogenesis; carotenoid; Cryptophyta; Glaucophyta; lutein; red algae; Rhodophyta; Zeaxanthin
Strain(s): 697700705133221372138 
PubMed: 27273528
DOI: 10.1111/jpy.12411

Mikulic, P., Beardall, J. 2014 Contrasting ecotoxicity effects of zinc on growth and photosynthesis in a neutrophilic alga (Chlamydomonas reinhardtii) and an extremophilic alga (Cyanidium caldarium). Chemosphere, 112, 402-411.
Keywords: Photosynthesis; Algae; Zinc; Extremophile; Neutrophile; Acclimation
Strain(s): 2137 
PubMed: 25048933
DOI: 10.1016/j.chemosphere.2014.04.049

Ohta, N., Nagashima, H., Kawano, S., Kuroiwa, T. 1992 Isolation of the chloroplast DNA and the sequence of the trnK gene from Cyanidium caldarium strain RK-1. Plant Cell Physiol., 33, 657-661.
Keywords: chloroplast DNA; Cyanidium caldarium; transfer RNA-lysine
Strain(s): 2502137 
DOI: 10.1093/oxfordjournals.pcp.a078302

Hamana, K., Matsuzaki, S., Niitsu, M., Samejima, K., Nagashima, H. 1990 Polyamines of unicellular thermoacidophilic red alga Cyanidium caldarium. Phytochemistry, 29, 377-380.
Keywords: Cyanidium caldarium; Rhodophyta; red algae; polyamines; chemotaxonomy
Strain(s): 25021373891 
DOI: 10.1016/0031-9422(90)85082-Q

Nagashima, H., Fukuda, I. 1983 Floridosides in unicellular hot spring algae. Phytochemistry, 22, 1949-1951.
Keywords: Cyanidium caldarium; Chroococcidiopsis sp.; hot spring algae; chemotaxonomy; low MW carbohydrates; floridoside; iso-floridoside; autotroph; heterotroph
Strain(s): 25021373891 
DOI: 10.1016/0031-9422(83)80020-X

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