Macrochaete gen. nov (Nostocales, Cyanobacteria), a taxon morphologically and molecularly distinct from Calothrix

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F16%3A43890810" target="_blank" >RIV/60076658:12310/16:43890810 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985939:_____/16:00468427

Výsledek na webu

<a href="http://onlinelibrary.wiley.com/doi/10.1111/jpy.12425/abstract;jsessionid=918583F9F41AA33C8C24DFCE07AA81F0.f02t02" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1111/jpy.12425/abstract;jsessionid=918583F9F41AA33C8C24DFCE07AA81F0.f02t02</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jpy.12425" target="_blank" >10.1111/jpy.12425</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Macrochaete gen. nov (Nostocales, Cyanobacteria), a taxon morphologically and molecularly distinct from Calothrix

Popis výsledku v původním jazyce

Historically, the genus Calothrix included all noncolonial, tapered, heterocytous filaments within the cyanobacteria. However, recent molecular phylogenies show that Calothrix defined in this sense represents five distinct clades. The type species of Calothrix is marine, with solitary basal heterocytes, no akinetes, and distal ends tapering abruptly into short hairs. We examined the morphology and phylogeny of 45 tapering cyanobacteria in the Rivulariaceae, including freshwater and marine representatives of both Calothrix (35 strains) and its sister taxon Rivularia (10 strains). The marine Calothrix fall into two lineages, but we lack the generitype and so cannot identify the clade corresponding to the type species. The freshwater and soil Calothrix fall into the C.parietina clade and are characterized by having a basal heterocyte, no akinetes, and gradual taperingbut not into a long hyaline hair. Macrochaete gen. nov. is a freshwater taxon sister to the Calothrix lineages but clearly separated from Rivularia. The species in this genus differ morphologically from Calothrix by their ability to produce two heteromorphic basal heterocytes and specific secondary structures of the 16S-23S ITS. An additional feature present in most species is the presence of a distal, long hyaline hair, but this character has incomplete penetrance due to its expression only under specific environmental conditions (low phosphate), and in one species appears to be lost. We recognize three species: M.psychrophila (type species) from cold environments (high mountains, Antarctica), M.santannae from wet walls of subtropical South America, and M.lichenoides, a phycobiont of lichens from Europe.

Název v anglickém jazyce

Macrochaete gen. nov (Nostocales, Cyanobacteria), a taxon morphologically and molecularly distinct from Calothrix

Popis výsledku anglicky

Historically, the genus Calothrix included all noncolonial, tapered, heterocytous filaments within the cyanobacteria. However, recent molecular phylogenies show that Calothrix defined in this sense represents five distinct clades. The type species of Calothrix is marine, with solitary basal heterocytes, no akinetes, and distal ends tapering abruptly into short hairs. We examined the morphology and phylogeny of 45 tapering cyanobacteria in the Rivulariaceae, including freshwater and marine representatives of both Calothrix (35 strains) and its sister taxon Rivularia (10 strains). The marine Calothrix fall into two lineages, but we lack the generitype and so cannot identify the clade corresponding to the type species. The freshwater and soil Calothrix fall into the C.parietina clade and are characterized by having a basal heterocyte, no akinetes, and gradual taperingbut not into a long hyaline hair. Macrochaete gen. nov. is a freshwater taxon sister to the Calothrix lineages but clearly separated from Rivularia. The species in this genus differ morphologically from Calothrix by their ability to produce two heteromorphic basal heterocytes and specific secondary structures of the 16S-23S ITS. An additional feature present in most species is the presence of a distal, long hyaline hair, but this character has incomplete penetrance due to its expression only under specific environmental conditions (low phosphate), and in one species appears to be lost. We recognize three species: M.psychrophila (type species) from cold environments (high mountains, Antarctica), M.santannae from wet walls of subtropical South America, and M.lichenoides, a phycobiont of lichens from Europe.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Phycology

ISSN

0022-3646

e-ISSN

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Svazek periodika

52

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

18

Strana od-do

638-655

Kód UT WoS článku

000383589700013

EID výsledku v databázi Scopus

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