Morphology, molecular phylogeny and taxonomy of Nitella comptonii (Charales, Characeae)

Sakayama, Hidetoshi; Arai, Shogo; Nozaki, Hisayoshi; Kasai, Fumie; Watanabe, Makoto M.
July 2006
Phycologia;Jul2006, Vol. 45 Issue 4, p417
Academic Journal
The taxonomic status of Nitella comptonii (Charales, Characeae) is not well understood because this species has not been recorded since the early 20th century, and detailed examinations of fully mature individuals have not been performed. Recently, we collected fully mature N. comptonii from the Okinawa Islands in Japan. These exhibited a distinctive fertile spherical head in the axils, and their vegetative and reproductive structures were consistent with those in the original description of the species. In 1965 in his ‘A revision of the Characeae’, R. D. Wood assigned N. comptonii as a subspecies of N. pseudoflabellata. In our study, scanning electron microscopic analysis of N. comptonii oospores revealed that external and internal oospore morphology of N. comptonii was clearly different from that of N. pseudoflabellata. In addition, multiple DNA phylogeny using the concatenated sequences of the chloroplast rbcL, atpB, and psaB genes, and nuclear 5.8S ribosomal RNA gene and internal transcribed spacer regions, clearly separated N. comptonii from N. pseudoflabellata. Therefore, N. comptonii should be classified as a separate species.


Related Articles

  • Non-homogeneous models of sequence evolution in the Bio++ suite of libraries and programs. Dutheil, Julien; Boussau, Bastien // BMC Evolutionary Biology;2008, Vol. 8, Special section p1 

    Background: Accurately modeling the sequence substitution process is required for the correct estimation of evolutionary parameters, be they phylogenetic relationships, substitution rates or ancestral states; it is also crucial to simulate realistic data sets. Such simulation procedures are...

  • Morphology, Ciliary Pattern and Molecular Phylogeny of Trachelophyllum brachypharynx Levander, 1894 (Litostomatea, Haptoria, Spathidiida). Seok Won JANG; VĎAČNÝ, Peter; Ahmed SHAZIB, Shahed Uddin; Mann Kyoon SHIN // Acta Protozoologica;2015, Vol. 54 Issue 2, p123 

    We isolated a relatively unknown haptorian ciliate, Trachelophyllum brachypharynx, in brackish water from the mouth of the Taehwa River, South Korea. The morphology of this isolate was studied using in vivo observation and protargol impregnation, and its evolutionary history was revealed by...

  • The ITS1-5.8S-ITS2 Sequence Region in the Musaceae: Structure, Diversity and Use in Molecular Phylogeny. Hřibová, Eva; Čížková, Jana; Christelová, Pavla; Taudien, Stefan; de Langhe, Edmond; Doležel, Jaroslav // PLoS ONE;2011, Vol. 6 Issue 3, p1 

    Genes coding for 45S ribosomal RNA are organized in tandem arrays of up to several thousand copies and contain 18S, 5.8S and 26S rRNA units separated by internal transcribed spacers ITS1 and ITS2. While the rRNA units are evolutionary conserved, ITS show high level of interspecific divergence...

  • Redefinition of Nosema pyrausta ( Perezia pyraustae Paillot 1927) basing upon ultrastructural and molecular phylogenetic studies. Tokarev, Yuri; Malysh, Julia; Kononchuk, Anastasia; Seliverstova, Elena; Frolov, Andrei; Issi, Irma // Parasitology Research;Feb2015, Vol. 114 Issue 2, p759 

    Populations of European corn borer ( Ostrinia nubilalis Hübner) from Krasnodar Territory (Southwestern Russia) become regularly infected with Nosema-like microsporidia. To identify the parasite, it was subjected to electron microscopy and small subunit ribosomal RNA (SSU rRNA) gene...

  • A New Notosuchian from the Late Cretaceous of Brazil and the Phylogeny of Advanced Notosuchians. Pol, Diego; Nascimento, Paulo M.; Carvalho, Alberto B.; Riccomini, Claudio; Pires-Domingues, Ricardo A.; Zaher, Hussam // PLoS ONE;Apr2014, Vol. 9 Issue 4, p1 

    A new notosuchian crocodyliform from the Late Cretaceous Bauru Group found in the southeastern State of São Paulo (Brazil) is described here. The new taxon, Caipirasuchus stenognathus, is referred as a new species of the recently erected genus Caipirasuchus within the clade Sphagesauridae...

  • Movement adds bite to the evolutionary morphology of mammalian teeth. Polly, P. David // BMC Biology;2012, Vol. 10 Issue 1, p69 

    Selection and constraints put limits on morphological evolution. Mammalian teeth are no exception, and the need for them to meet precisely exerts exacting constraints on a staggering array of developmental and functional factors that must be integrated to maintain their performance as they...

  • Phylogeny of freshwater viviparid snails in Japan. Takahiro Hirano; Takumi Saito; Satoshi Chiba // Journal of Molluscan Studies;Nov2015, Vol. 81 Issue 4, p435 

    We document extensive incongruence between molecular phylogeny and the current taxonomy of the freshwater gastropod family Viviparidae in Japan. A phylogeny based on the mitochondrial cytochrome oxidase subunit I and 16S rRNA genes for East Asian viviparids comprises three major clades, the two...

  • Field et al. Redux. Telford, Maximilian J. // EvoDevo;2013, Vol. 4 Issue 1, p1 

    On 12 February 1988 (by coincidence Charles Darwin's birthday), a paper published in Science by Katherine Field, Rudy Raff, and colleagues presented the first credible molecular analysis of metazoan phylogeny based on sequences from the small subunit ribosomal RNA gene (SSU). Here I examine the...

  • Nearly Complete 28S rRNA Gene Sequences Confirm New Hypotheses of Sponge Evolution. Thacker, Robert W.; Hill, April L.; Hill, Malcolm S.; Redmond, Niamh E.; Collins, Allen G.; Morrow, Christine C.; Spicer, Lori; Carmack, Cheryl A.; Zappe, Megan E.; Pohlmann, Deborah; Hall, Chelsea; Diaz, Maria C.; Bangalore, Purushotham V. // Integrative & Comparative Biology;Sep2013, Vol. 53 Issue 3, p373 

    The highly collaborative research sponsored by the NSF-funded Assembling the Porifera Tree of Life (PorToL) project is providing insights into some of the most difficult questions in metazoan systematics. Our understanding of phylogenetic relationships within the phylum Porifera has changed...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics