Morphology and molecular study of Pterosiphonia arenosa sp. nov. (Rhodomelaceae, Rhodophyta) from Jeju Island, Korea

Kim, Myung Sook; Kim, Su Yeon; Yang, Mi Yeon; Kim, Byeongseok; Díaz‐Tapia, Pilar

doi:10.4490/algae.2012.27.4.259

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…A pit like morphology was seen and developed with a flow rate in view of the number of pits. It was shown that a pit like morphology is caused by the inclusion dissolution at the early stage, and is developed into a scallop (orange peel) pattern [10]. From this, it is presumed that the density and size of a pit like morphology is an index of the FAC rate.…”

Section: Resultsmentioning

confidence: 99%

Oxidation Behavior of Steel With Cr Content and Water Flow Rate

Kim¹,

Kim²,

Shin³

et al. 2017

Archives of Metallurgy and Materials

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Fast water flow facilitates ferrous ion transport leading to flow accelerated corrosion (FAC) of carbon steel and the possibility of a large accident through a failure of a secondary pipe in a nuclear power plant. Ion transport is directly linked to oxide properties such as the thickness, chemical composition and porosity. This work deals with a precise observation of the cross section of the corroded specimen focusing on an oxide passivity and its thickness using SEM (scanning electron microscope) and TEM (transmission electron microscope) as well as an apparent weight loss and a surface observation for the specimens corroded using a rotating cylindrical electrode autoclave system in pure water of pH 7 at 150°C having dissolved oxygen below 1 ppb within a flow rate range of 0 to 10 m/s. The Cr content in steel was changed from 0.02 to 2.4 wt%. Increasing the Cr content in the alloy, the FAC rate and oxide thickness decreased. The oxide porosity tends to decrease with the Cr content and immersion time owing to the development of Cr containing oxide. The oxidation behavior is not changed with the immersion time.

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Section: Resultsmentioning

confidence: 99%

Oxidation Behavior of Steel With Cr Content and Water Flow Rate

Kim¹,

Kim²,

Shin³

et al. 2017

Archives of Metallurgy and Materials

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“…We used the same program with the same setting and 1000 replications to generate bootstrap values for these phylogenies. Bayesian and Kang 2011) and rbcLF145-rbcLR898 and rbcLF762-rbcLR1442 (Kim et al 2012). For samples that failed amplification, we redesigned the primers (e.g., CrbcLF725…”

Section: Methodsmentioning

confidence: 99%

Species delimitation of the genus Champia (Rhodymeniales, Rhodophyta) from Korea using DNA barcoding

Koh¹,

Cho²,

Kim³

2013

J. Ecol. Environ.

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DNA barcoding is becoming a widely applied tool to accurately discriminate red algae. We tested the effectiveness of DNA barcoding for identification and discovery of Champia species in Korea and clarified the phylogenetic relationships using the plastid rbcL gene. As results, we described four species of Champia such as C. inkyua sp. nov., C. recta Noda, C. bifida Okamura, and C. expansa Yendo. A new species, C. inkyua, is characterized by entangled thallus, terete and irregular branches, hooked apices, and longitudinal filaments running throughout the frond periphery only. Longitudinal filaments were composed of a complete cell with two half cells between diaphragms in the cavity. C. recta and C. bifida were reinstated with previously used names of C. parvula and C. compressa, respectively. C. recta is the first recorded species from Korea and is characterized by an erect thallus, terete and irregular branches, and straight apices. C. bifida is characterized by compressed thallus, pinnate or alternate branches, and bifid apices. C. expansa is characterized by flabellate thallus and dichotomous branches. Molecular analyses of COI and rbcL genes revealed sufficient sequence divergence to warrant species recognition in the genus Champia.

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“…Molecular taxonomy is especially useful for species that are wide-ranging and have few clear-cut morphological diagnostic criteria (Kim et al 2012a, Yang et al 2013. We assembled a collection of specimens of (i) C. lactuca from the subtidal zone of Jeju Island, Korea, (ii) C. luxurians from intertidal zone of Chiba, Japan, and (iii) C. seminervis from the type locality in Spain.…”

Section: Methodsmentioning

confidence: 99%

Cryptonemia asiatica sp. nov. (Halymeniaceae, Rhodophyta), a new marine macroalgal species from Korea and Japan

Yang¹,

Kim

2014

J. Ecol. Environ.

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We propose Cryptonemia asiatica sp. nov. from Korea and Japan. We used molecular analyses of plastid-encoded rbcL and morphological observations to resolve the taxonomic identities of C. lactuca from Korea, C. luxurians from Japan, and C. seminervis from Spain. Specimens of C. lactuca and C. luxurians fell within the same molecular phylogenetic clade (with 100% bootstrap support) and were clearly separated from specimens of C. luxurians collected from the type locality in Brazil. Our analyses demonstrated identical molecular sequences between C. seminervis specimens from Spain and C. lomation specimens from France. Morphological characteristics of the new species, C. asiatica include prominent midribs through the mid thallus, a cortex 4-6 cells thick, and a blade with undulate margins. Molecular evidence indicates that specimens from Korea and Japan previously assigned to C. lactuca and C. luxurians, respectively, should be reassigned to Cryptonemia asiatica. Binomial C. luxurians from Brazil should be resurrected as the independent species of Cryptonemia.

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Morphology and molecular study of Pterosiphonia arenosa sp. nov. (Rhodomelaceae, Rhodophyta) from Jeju Island, Korea

Cited by 14 publications

References 12 publications

Oxidation Behavior of Steel With Cr Content and Water Flow Rate

Oxidation Behavior of Steel With Cr Content and Water Flow Rate

Species delimitation of the genus Champia (Rhodymeniales, Rhodophyta) from Korea using DNA barcoding

Cryptonemia asiatica sp. nov. (Halymeniaceae, Rhodophyta), a new marine macroalgal species from Korea and Japan

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