Strain number NIES-65  
Phylum Streptophyta  
Class Zygnematophyceae  
Scientific name Closterium peracerosum-strigosum-littorale complex  
Synonym  
Former name  
Common name Desmid  
Locality (Date of collection) Lake Kasumigaura, Tamatsukuri, Ibaraki, Japan (1974-11-**)  
Latitude / Longitude 36.0428477398 / 140.373233439 
Habitat (Isolation source) Freshwater (Lake water)  
History < Watanabe, Makoto M.  
Isolator (Date of isolation) Watanabe, Makoto M. (1974-11-**)  
Identified by Watanabe, Makoto M.  
State of strain Subculture; Unialgal; Clonal; Axenic[2017 Dec]  
Culture condition
(Preculture condition)
Medium:  C  
Temperature:  15 (20) C
Light intensity:  7 (10-17) µmol photons/m2/sec, L/D cycle:  10L:14D
Duration:  3 M (21 D)  
Gene information 18S rRNA ( AB363687 ) , 5.8S-ITS2-28S ( AB625545 ) , CpMXIa mRNA ( AB197777 ) , CpMXIb mRNA ( AB197778 ) , CpMXIc mRNA ( AB197779 )  
Cell size (min - max)  
Organization Unicellular 
Characteristics Heterothallic: Mating type (+) ; Mating group II B  
Other strain no. Other strain no. : KAS-4-30  
Remarks Axenic 
Movie  
Reference
Kawaguchi, Y. W., Tsuchikane, Y., Tanaka, K., Taji, T., Suzuki, Y., Toyoda, A., Ito, M., Watano, Y., Nishiyama, T., Sekimoto, H., Tsuchimatsu, T. 2023 Extensive copy number variation explains genome size variation in the unicellular Zygnematophycean alga, Closterium peracerosum–strigosum–littorale complex. Genome Biol. Evol., 15, evad115 (article ID).
Keywords: gene duplication; dosage compensation; copy number variation; green algae
Strain(s): 53545859626364656826126664319432043214548455045514552 
PubMed: 37348049
DOI: 10.1093/gbe/evad115

Tsuchikane, Y., Kobayashi, H., Kato, M., Watanabe, J., Wu, J. T., Sekimoto, H. 2018 Identification of a new mating group and reproductive isolation in the Closterium peracerosum–strigosum–littorale complex. J. Plant Res., 131, 735–746.
Keywords: Alga; Closterium; Mating group; Reproductive isolation; Sex pheromone; Speciation
Strain(s): 535455646566676826126243194320 
PubMed: 29948484
DOI: 10.1007/s10265-018-1043-8

Tsuchikane, Y., Tsuchiya, M., Hindák, F., Nozaki, H., Sekimoto, H. 2012 Zygospore formation between homothallic and heterothallic strains of Closterium. Sex. Plant Reprod., 25, 1-9.
Keywords: Closterium; Conjugation; Homotallism; Heterothallism: Dexual reproduction; Zygospore
Strain(s): 5859606162636465676869702612666 
PubMed: 21858438
DOI: 10.1007/s00497-011-0174-z

Sekimoto, H. 2012 Speciation and reproductive isolation in unicellular charophycean alga, Closterium peraceroum-strigosum-littorale complex. IFO Res. Commun., 26, 71-85 (in Japanese with English summary).
Keywords: Closterium: heterothallism; homothallism; reproductive isolation; sex pheromone
Strain(s): 58596061626364656768697026145484551 

Tsuchikane, Y., Ito, M., Sekimoto, H. 2008 Reproductive isolation by sex pheromones in the Closterium peracerosum-strigosum-littorale complex (Zygnematales, Charophyceae). J. Phycol., 44, 1197-1203.
Keywords: Closterium; conjugation; pheromone; reproductive isolation; sexual reproduction
Strain(s): 53545859646567686970229261 
PubMed: 27041716
DOI: 10.1111/j.1529-8817.2008.00577.x

Hamada, S., Sekimoto, H., Tanabe, Y., Tsuchikane, Y., Ito, M. 2006 Isolation of myosin XI genes from the Closterium peracerosum-strigosum-littorale complex and analysis of their expression during sexual reproduction. J. Plant Res., 119, 105-113.
Keywords: Closterium; Cytokinesis; Myosin XI; Real-time PCR; Sexual cell division; Sexual reproduction
Strain(s): 656768 
PubMed: 16456621
DOI: 10.1007/s10265-005-0249-8

Mori, F., Erata, M., Watanabe, M. M. 2002 Cryopreservation of cyanobacteria and green algae in the NIES-Collection. Microbiol. Cult. Coll., 18, 45-55.
Keywords: cryopreservation; cyanobacteria; green algae; FDA staining method; NIES-Collection
Strain(s): 192122232425262728293031323334353637383940414445465051525354555658596061626364656667686970737475767778798081878990919293949596979899100101102103104105106107108109110111112119120122123125127128129130131132133134135137138139144147151152153154155156157158159160162163164165166167168170171172173174175176177178179180181182183185186187188189191192193194197198199200201202203204205206207208209210211212213214215216217224226227228229230231232241242243244245246248257259261262263266267268287288289290294295297298299300301302303305306308309310312313329334337338339340341342349351359360361362375378379380382384385390394396397398415416418419421422423424425426427428429430431432433434436437438439440446447448449450451452453454455456457458459460464468469474478479480481503504505506507509510512514515522523524527528529530531532536537538539540541542543544545546564565566567568569570571572573574575576577578579580581582583584585592593594595596597598604610628630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667672685686687688689690691692693694717718719720721722723724725726727728729 

Sekimoto, H. 2000 Intercellular communication during sexual reproduction of Closterium (Conjugatophyceae). J. Plant Res., 113, 343-352.
Keywords: chemotaxis; Closterium; conjugation; mating; sex pheromone; sexual reproduction
Strain(s): 6465228229 
DOI: 10.1007/PL00013941

Sekimoto, H. & Fukumoto, R. 1999 Sex pheromones in Closterium. Chem. Regul. Plant, 34, 305-315.
Strain(s): 64656768 

Sekimoto, H., Sone, Y., Fujii, T. 1995 Biochemical, physiological, and molecular analysis of sexual isolation in the species complex Closterium peracerosum-strigosum-littorale (Chlorophyta). J. Phycol., 31, 611-615.
Keywords: Chlorophyta; Closterium peracerosum-strigosum-littorale complex; conjugation; pheromone; plotoplast-release-inducing protein (PR-IP); sexual isolation
Strain(s): 64656768 
DOI: 10.1111/j.1529-8817.1995.tb02557.x

Sekimoto, H. & Fujii, T. 1993 Cell-cell interaction involved in the sexual reproduction of Closterium [Mikadukimo no yûsei seisyoku ni kakawaru saibôkan jôhô kôkan]. Iden, 47 (1), 43-48 (in Japanese).
Strain(s): 64656768 

Nakayama, T., Ishii, E., Kanazawa, H. 1987 The study on the isolation and culture of the protoplast from heterothallic Closterium. J. Fac. Sci., Hokkaido Univ., Ser. V (Bot.), 14, 95-114.
Strain(s): 6465 

Kato, A., Ohmura, K., Kanazawa, H., Sasaki, K. 1983 Natural and artificial production of protoplasts from heterothallic and homothallic Closterium. J. Fac. Sci., Hokkaido Univ., Ser. V (Bot.), 13, 7-15.
Strain(s): 6465 

Kato, A. & Sasaki, K. 1983 Effects of tunica-mycin on sexual reproduction in heterothallic strains of Closterium. J. Fac. Sci., Hokkaido Univ., Ser. V (Bot.), 13, 1-6.
Strain(s): 6465 

Watanabe, M. M. & Ichimura, T. 1982 Biosystematic studies of the Closterium peracerosum-strigosum-littorale complex. IV. Hybrid breakdown between two closely related groups, Group II-A and Group II-B. Bot. Mag. Tokyo, 95, 241-247.
Keywords: Closterium; fertility; hybrid breakdown; post-zygotic isolating mechanism; viability
Strain(s): 5152536465 
DOI: 10.1007/BF02488536

Kato, A., Obokata, J., Sasaki, K. 1981 Mating type interaction in Closterium peracerosum-strigosum-littorale: mating induced protoplast release. Plant Cell Physiol., 22, 1215-1222.
Keywords: Closterium peracerosum-strigosum-littorale; conjugation; disruped cell; mating type interaction; protoplast release
Strain(s): 6465 
DOI: 10.1093/oxfordjournals.pcp.a076273

Watanabe, M. M. & Ichimura, T. 1978 Biosystematic studies of the Closterium peracerosum-strigosum-littorale complex. II. Reproductive isolation and morphological variation among several populations from the Northern Kanto area in Japan. Bot. Mag. Tokyo, 91, 1-10.
Strain(s): 51525354555658596061626364656970261 

Watanabe, M. M. & Ichimura, T. 1978 Biosystematic studies of the Closterium peracerosum-strigosum-littorale complex. III. Degrees of sexual isolation among the three population groups from the Northern Kanto area. Bot. Mag. Tokyo, 91, 11-24.
Strain(s): 51525354555658596061626364656970261 
DOI: 10.1007/BF02489099

Watanabe, M. M. 1977 Biosystematics in Closterium of sexual unicellular green algae and Calothrix and Spirulina of asexual filamentous blue-green algae, with special reference to the analyses of natural populations. Thesis D. Sci., Hokkaido University, 114 pp., 28 tables, 54 figs.
Strain(s): 39454651525354555658596061626364656667686970261262266268 

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