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Sterols of the aberrant plastid, Kareniacean dinoflagellate Asterodinium gracile: Chemotaxonomic overlap with amphisterol‐producing Amphidinium carterae Phycol. Res. (IF 1.5) Pub Date : 2024-03-14 Jeffrey D. Leblond, Kyra Sabir, Daniel Ayoub, Mackenzie B. McKinnon, Chelsea S. Myers, Tawakalit J. Busari, Braedyn E. Hollingsworth
SUMMARYDinoflagellates have a rich history of characterization of their membrane‐reinforcing sterols because of a structural diversity and chemotaxonomic utility uncommon to other classes of algae. The Kareniaceae are no exception in that they produce sterols, often containing a Δ8(14) nuclear unsaturation, which are rare in most other dinoflagellate groups. A continuing goal of our laboratory is to
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Taxonomic study of the polyphyletic Dudresnaya (Dumontiaceae, Florideophyceae) with descriptions of Dudresnaya ryukyuensis sp. nov. and two new genera, Himehibirhodia and Nudresdaya Phycol. Res. (IF 1.5) Pub Date : 2024-02-25 Masakazu Hoshino, Kevin C. Wakeman, Aki Kato, Taiju Kitayama, Alison R. Sherwood, Shinya Uwai, Kazuhiro Kogame
The red algal genus Dudresnaya (Dumontiaceae, Gigartinales) has traditionally been a morphologically well-defined taxon, but its molecular phylogeny has rarely been studied. To examine the phylogenetic relationships among Dudresnaya species, we generated new partial sequences of mitochondrial cox1, chloroplast rbcL and nuclear 28S rRNA genes from an undescribed Dudresnaya species from Okinawa Island
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Announcement Phycol. Res. (IF 1.5) Pub Date : 2024-01-28
Novelties in nomenclature and typification appearing in Phycological Research 72 (1). Minorisa fusiformis Shiratori, Yuta Kato & K. Ishida sp. nov. Phycol. Res. 72: 32–33. January 2024 (not on 17 October 2023). *1 Minorisa magna Shiratori, Yuta Kato & K. Ishida sp. nov. Phycol. Res. 72: 32–33. January 2024 (not on 17 October 2023). *1 Minorisa megafusiformis Shiratori, Yuta Kato & K. Ishida sp. nov
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Field survey of the phase and sex ratios of the brown alga Dictyota dichotoma (Dictyotales, Phaeophyceae) using sex-specific molecular markers Phycol. Res. (IF 1.5) Pub Date : 2024-01-17 Takahiro Arai, Keiichiro Koiwai, Reiko Nozaki, Hidehiro Kondo, Ikuo Hirono, Hidekazu Suzuki, Mitsunobu Kamiya
Dominance of one phase (i.e. diploid or haploid) has been reported in various isomorphic macroalgae; however, studies of the relative frequencies of the two phases are limited to a few taxa owing to the difficulty in identifying phases of sterile thalli. In Dictyota dichotoma, we have previously documented the dominance of fertile sporophytes. In the present study, the phase and sex ratios of sterile
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Vegetation variety affected by local environments in a coral reef lagoon Phycol. Res. (IF 1.5) Pub Date : 2024-01-09 Kandai Tozaki, Gregory N. Nishihara, Azusa Kawate, Teruko Konishi, Yoichi Sato, Michihiro Ito, Hiroyuki Fujimura, Atsuko Tanaka
From shore to sea, coral reefs can generally be divided into a lagoon zone, a reef crest, and a fore reef. Environmental variables, such as nutrient fluxes, light availability, and water temperature, vary among the zones and influence the biodiversity of submerged macrophytes. Additionally, the biodiversity of vegetation within the lagoon appears to be affected by multiple and extremely localized conditions
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Differential cell size reduction of two sympatric Epithemia (Bacillariophyta) taxa in Nakaikemi Wetland, Japan Phycol. Res. (IF 1.5) Pub Date : 2024-01-08 Shiho Kamakura, Taisuke Ohtsuka, Tamotsu Nagumo, Shinya Sato
We observed contrasting temporal changes in cell size between two Epithemia taxa. The life cycle of diatoms is closely linked to their cell size, with a gradual decrease during the vegetative stage and a recovery through sexual reproduction. Sexual reproduction is triggered when cells become smaller than a species-specific size threshold and receive species-specific environmental cues. Few studies
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Optimizing cultivation and shipping environments for an edible green alga, Caulerpa chemnitzia var. laetevirens (Bryopsidales) from Japan: Effects of temperature, irradiance, desiccation and salinity on photochemical efficiency Phycol. Res. (IF 1.5) Pub Date : 2023-12-26 Ryuta Terada, Koki Matsuda, Gregory N. Nishihara
The effects of four stressors, temperature, irradiance, desiccation and salinity, on the photochemical efficiency (ΔF/Fm′$$ {F}_m^{\prime } $$) of an edible green alga, Caulerpa chemnitzia var. laetevirens from Kagoshima, Japan, were determined for optimizing cultivation and shipping environments using a pulse amplitude modulation-chlorophyll fluorometer. The ΔF/Fm′$$ {F}_m^{\prime } $$ remained stable
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Growth and photosynthetic physiology of holopelagic Sargassum (Phaeophyceae) under laboratory conditions Phycol. Res. (IF 1.5) Pub Date : 2023-12-27 Román Manuel Vásquez-Elizondo, Erika Vázquez-Delfín, Daniel Robledo
Species of holopelagic Sargassum are responsible for Caribbean golden tides, commonly known as ‘Sargassum events’. These events mainly comprise Sargassum fluitans and Sargassum natans I, which are exposed to high levels of irradiance, but also self-shading within their floating masses. In this study, we grew S. fluitans and S. natans I and acclimated them to low-light conditions at 23°C in the laboratory
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A study of Klisinema koreana sp. nov. (Desertifilaceae, Cyanobacteria) from the Republic of Korea based on morphological, ecological and molecular analyses Phycol. Res. (IF 1.5) Pub Date : 2023-12-17 So-Won Kim, Nam-Ju Lee, Ji-Ho Song, Ok-Min Lee
Genus Klisinema (Desertifilaceae, Desertifilales) has only one species, Klisinema persicum, reported worldwide, and this species was found in soils around thermal springs (50°C) of high radiation regions. Simple filament cyanobacteria belonging to the genus Klisinema were collected from Korea, and cultured samples were studied through morphological, ecological and molecular analyses. Both Korean K
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Evolutionary analysis of MID homologs during the transition from homothallic species to heterothallic species in Volvox sect. Volvox (Chlorophyceae) Phycol. Res. (IF 1.5) Pub Date : 2023-11-30 Shion Yamagishi, Kayoko Yamamoto, Kohei Takahashi, Hiroko Kawai-Toyooka, Shigekatsu Suzuki, Ryo Matsuzaki, Haruyo Yamaguchi, Masanobu Kawachi, Tetsuya Higashiyama, Hisayoshi Nozaki
The diversity and the evolution of mating systems have been studied in various eukaryotes. Volvox sect. Volvox of the volvocine green algae is suitable for evolutionary studies of the transition from homothallic to heterothallic mating systems because this transition is recognized in distal lineages within Volvox sect. Volvox. MID homologs are important in determining the mating type minus and male
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Trentepohlia brevicellulis comb. et stat. nov. (Trentepohliaceae, Ulvophyceae) found in Japan Phycol. Res. (IF 1.5) Pub Date : 2023-11-29 Shinji Handa, Miho Nakahara-Tsubota, Izumi Shoda, Aya Mizobuchi, Taketo Nakano, Hiromi Tsubota
The family Trentepohliaceae contains many common aerial algae, most widely distributed, particularly in tropical and subtropical regions. Eight species of the genus Trentepohlia have been reported in Japan. We report another taxon, Trentepohlia brevicellulis (Cribb) S. Handa and H. Tsubota comb. et stat. nov., growing on bark in western Honshu, Japan. This alga was previously described as Trentepohlia
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Swimming zygote formation mediated by symmetrically arranged cell fusion sites in the gametes of Chlamydomonas eugametos (Chlorophyceae, Chlorophyta) Phycol. Res. (IF 1.5) Pub Date : 2023-11-06 Shinichi Miyamura
The spatial arrangement of cell fusion sites and eyespots of the gametes in vis-à-vis mating pairs of Chlamydomonas eugametos, corresponding to the swimming zygote of Chlamydomonas reinhardtii, were studied using field emission scanning electron microscopy and light microscopy, respectively. After the adhesion of mt+ and mt− gametes, each of which has one eyespot and two flagella elongated from the
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Molecular and morphological characterization of three novel Minorisa species (Chlorarachnea) and proposal for an emended description of the Minorisa minuta Phycol. Res. (IF 1.5) Pub Date : 2023-10-17 Takashi Shiratori, Yuta Kato, Ken-ichiro Ishida
Minorisa is a group of tiny uniflagellates belonging to the Cercozoa. These flagellates are the closest heterotrophic relatives of photosynthetic chlorarachniophytes and are one of the most abundant bacterivorous eukaryotes in coastal marine environments. Despite their evolutionary and ecological importance, taxonomic studies on Minorisa have not been conducted since the original description. In the
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Molecular study of the rare genus Neoabbottiella (Rhodophyta) reveals its assignment to the Halymeniaceae is incorrect Phycol. Res. (IF 1.5) Pub Date : 2023-10-16 Anna V. Skriptsova, Oksana S. Belous, Svetlana Yu. Shibneva, Alexander A. Semenchenko
The rare red algal genus Neoabbottiella from the Russian Pacific coast was taxonomically re-examined. Currently, Neoabbottiella is assigned to the Halymeniales; however, some features of the reproductive anatomy cast doubt on the correctness of assigning the genus to Halymeniaceae sensu lato. We investigated the phylogenetic affinities of Neoabbottiella using four DNA markers (nuclear LSU and SSU rDNA
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Referees Phycol. Res. (IF 1.5) Pub Date : 2023-10-02
The Editorial Board of Phycological Research is grateful for the following referees' kind advice on the manuscripts submitted for Volume 70 (2022) and 71 (2023) Abe, Mahiko Akita, Shingo Arihiro, Iwasaki Ashworth, Matt P Awai, Koichiro Bogaert, Kenny Boo, Ga Hun Chikaraishi, Yoshito Choi, Jong-il Craveiro, Sandra Carla De Ramon N'Yeurt, Antoine del Campo, Javier Domozych, David Endo, Hikaru Gabriel
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Characterization of cell wall polysaccharide from Cladosiphon okamuranus cultivated in different locations Phycol. Res. (IF 1.5) Pub Date : 2023-08-24 Mahanama Geegana Gamage Awanthi, Natsuki Nakasone, Hirosuke Oku, Kanefumi Kitahara, Michihiro Ito, Atsuko Tanaka, Yoichi Sato, Yuichiro Numata, Teruko Konishi
Cladosiphon okamuranus is an excellent source of fucoidan among any brown algae spp. However, the structure of polysaccharide varies significantly depending on the species, harvesting season and geographical location. To understand how geographic location affects the structure of cell wall polysaccharide, C. okamuranus cultivated in eight places (Bise, Katsuren, Yonashiro, Shikiya, Karimata, Nishihara
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Composition of galactolipids, betaine lipids and triglyceride-associated fatty acids of the symbiotic dinoflagellate Zooxanthella (Brandtodinium) nutricula: A glimpse into polyunsaturated fatty acids available to its polycystine radiolarian host Phycol. Res. (IF 1.5) Pub Date : 2023-08-07 Jori E. Graeff, Jeffrey D. Leblond
Zooxanthella nutricula is a photosynthetic dinoflagellate symbiont of polycystine radiolarians. As such, it is hypothesized to provide fixed organic carbon, including in the form of acylglycerolipids and sterols, to its non-photosynthetic host. We have previously characterized the sterols of Z. nutricula that may be transferred to its host and, in the present study, have turned our attention to three
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Heat shock and iron limitation modulate the metabolic profile of the cyanobacterium Microcystis aeruginosa NIES-88 Phycol. Res. (IF 1.5) Pub Date : 2023-07-25 Nandani Balloo, Jakia Jerin Mehjabin, Chin-Soon Phan, Tatsufumi Okino
The freshwater cyanobacterium Microcystis aeruginosa NIES-88, which can produce microcystins, micropeptins, and argicyclamides, was subjected to a one strain many compounds (OSMAC) analysis. We report its response to two environmental stressors, temperature and iron limitation, by means of untargeted and targeted metabolomics. The results demonstrated a slower specific growth rate of 0.20 per day and
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Betaine lipids of Symbiodiniaceae hosted by Indo-Pacific corals Phycol. Res. (IF 1.5) Pub Date : 2023-07-17 Tatyana V. Sikorskaya, Ekaterina V. Ermolenko, Pham Quoc Long
The total pool of coral lipids consists of lipids produced by both the coral host and its symbiotic dinoflagellates of the family Symbiodiniaceae. Betaine lipids (BL) are characteristic of plasma membranes of microalgae. Composition of such BL as 1,2-diacylglyceryl-3-O-carboxy-(hydroxymethyl)-choline (DGCC) that occur in coral symbionts may depend on either Symbiodiniaceae species or coral species
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Novelties in nomenclature and typification appearing in Phycological Research 71 (3) Phycol. Res. (IF 1.5) Pub Date : 2023-07-06
Drouetiella epilithica D. Kim, N. Lee, H. Wang, A. Lim & O. Lee sp. nov. Phycol. Res. 71 (online): [143]. 9 March 2023. Stenomitos terricola N. Lee, D. Kim & O. Lee sp. nov. Phycol. Res. 71 (online): [156]. 18 March 2023. No new typifications appearing in Phycological Research 71 (3) (“Typification” does not include type citations associated with new taxa). For details of the author citations and the
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Confirmation of Neoporphyra cf. dentata on Shikinejima, Izu Islands, southcentral Japan, and comparison with co-occurring Neoporphyra haitanensis Phycol. Res. (IF 1.5) Pub Date : 2023-04-30 Miku Okamoto, Airi Ikeura, Motoya Tamaki, Kyosuke Niwa
The Izu Islands of southcentral Japan are thought to fall within the distribution range of Neoporphyra dentata. However, the gametophytic blades of Bangiales collected from Shikinejima and Hachijojima, Izu Islands, were identified as Neoporphyra haitanensis in our previous study. Thus, it became uncertain whether N. dentata is distributed in the Izu Islands, including Shikinejima. To clarify whether
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Morphology and molecular phylogeny of the marine diatom genus Nagumoea (Bacillariophyceae) from Japan Phycol. Res. (IF 1.5) Pub Date : 2023-04-25 Kazuki Sugawara, Hidekazu Suzuki, Mitsunobu Kamiya, Keigo Osada, Andrzej Witkowski
The canal-bearing diatom genus Nagumoea, described based on only morphological evidence, was tentatively assigned to the order Bacillariales, although its phylogenetic position remained unclear. Because three isolates of Nagumoea (SK002, SK024 and SK053) were successfully established from Japanese coasts, we performed their morphological observations and molecular phylogenetic analyses to discuss the
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Anisotropic cell growth and cell wall structure in lenticular cell of Valonia utricularis (Ulvophyceae) Phycol. Res. (IF 1.5) Pub Date : 2023-04-05 Ichiro Mine, Yusuke Inoue, Takuji Yamamoto, Satoko Sekida
During cell division of the giant-celled green alga, Valonia utricularis, a lenticular cell is newly formed, which grows from disc-shaped to globular to obovoid. During the early developmental stages of growth, the cell surface shows a remarkable outward protrusion. In the present study, the anisotropy of cell growth, i.e. the difference between cell surface extension in meridional and radial orientation
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Novelties in nomenclature and typification appearing in Phycological Research 71 (2). Phycol. Res. (IF 1.5) Pub Date : 2023-04-03
Chiharadinium Dawut & T. Horiguchi gen. nov. Phycol. Res. 71 (online): [92]. 2 February 2023. Chiharadinium hexapraecingulum (T. Horiguchi & Chihara) Dawut & T. Horiguchi comb. nov. Phycol. Res. 71 (online): [92]. 2 February 2023. Colpomenia borea Dy, M. Hoshino, T. Abe, Yotsukura, K.M. Lee, S.M. Boo, N. Klochkova & Kogame sp. nov. Phycol. Res. 71 (online): [83]. 22 December 2022. No new typifications
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Galactolipid composition of the star-shaped dinoflagellate Asterodinium gracile (Kareniaceae): presence of hexadecatetraenoic acid (16:4(n-3))-containing monogalactosyldiacylglycerol as the predominant galactolipid and chemotaxonomic closeness to Karenia mikimotoi as the only other known Kareniacean producer of this fatty acid Phycol. Res. (IF 1.5) Pub Date : 2023-03-20 Jeffrey D. Leblond, Braedyn E. Hollingsworth, Daniel Ayoub, Mackenzie B. Mckinnon, Chelsea S. Myers, Tawakalit J. Busari, Kyra Sabir
Asterodinium gracile is a morphologically distinct, star-shaped member of the Kareniaceae with, like canonical Kareniaceae, a tertiary plastid of haptophyte origin. However, A. gracile's complement of carotenoid photosynthetic pigments has been shown to be chemotaxonomically atypical in that it possesses much less fucoxanthin when compared to that of other, canonical Kareniaceae in the genera Karenia
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Stenomitos terricola sp. nov. (Leptolyngbyaceae, Cyanobacteria) from the moist soil of Mt. Gwanggyo, Republic of Korea Phycol. Res. (IF 1.5) Pub Date : 2023-03-18 Nam-Ju Lee, Do-Hyun Kim, Ok-Min Lee
Stenomitos terricola FBCC-A190 was collected from soils around the trees of Mt. Gwanggyo, located in Yeongtong-gu, Suwon-si, Gyeonggi-do. S. terricola FBCC-A190 is a thin and simple filament with a cell length that is longer than its width. It has a thin and firm sheath, exhibiting a blue-green color. Species belonging to genus Stenomitos is semi-cryptic species with slight morphological differences
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Drouetiella epilithica sp. nov. and Drouetiella lurida (Oculatellaceae, Synechococcales) isolated in the Republic of Korea based on the polyphasic approach Phycol. Res. (IF 1.5) Pub Date : 2023-03-09 Do-Hyun Kim, Nam-Ju Lee, Hye-Ryeung Wang, An Suk Lim, Ok-Min Lee
Five strains of Drouetiella (ACKU666, 667, 668, 669 and 670) were isolated from gravels in water, stone monument and coastal mudflat in Korea, and were studied using morphological and molecular traits. All five strains had thin and simple trichomes and exhibited false branching. From these strains, four strains (ACKU666, 667, 668 and 669) exhibited similar cell lengths with reddish–brown colored cells
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Species diversity and distribution of the calcareous green macroalgae Halimeda in Taiwan, Spratly Island, and Dongsha Atoll, with the proposal of Halimeda taiwanensis sp. nov. Phycol. Res. (IF 1.5) Pub Date : 2023-02-27 Sinjai Phetcharat, Kattika Pattarach, Pin-Chen Chen, Wei-Lung Wang, Shao-Lun Liu, Jaruwan Mayakun
The calcified green algal genus Halimeda is one of the most ecologically important but morphologically diverse seaweeds in sub-tropical and tropical waters. Because of its high morphological plasticity, the identification of Halimeda species based on morphological characters is challenging without the assistance of molecular analysis. To date, the species diversity of Halimeda in Taiwan and its overseas
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New record of Sporochnus dotyi (Sporochnales, Phaeophyceae) from Kii Peninsula, Japan Phycol. Res. (IF 1.5) Pub Date : 2023-02-14 Hiroshi Kawai, Alison R. Sherwood, Shinsuke Ui, Takeaki Hanyuda
The subtidal brown algal species Sporochnus dotyi Brostoff (Sporochnales, Phaeophyceae), which has been regarded as a Hawaiian endemic, is reported from Kushimoto, Kii Peninsula, Pacific coast of central Honshu, Japan, for the first time outside Hawai'i. The species grew on subtidal rocks ca. 5–20 m deep attached by a small conical holdfast. The erect thalli were 5–30 cm high, terete, robust and alternately
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Establishing a new genus, Chiharadinium gen. nov. (Peridiniales, Dinophyceae) for a tidal pool dinoflagellate formerly known as Scrippsiella hexapraecingula Phycol. Res. (IF 1.5) Pub Date : 2023-02-02 Mahmutjan Dawut, Aika Yamaguchi, Takeo Horiguchi
To determine its accurate taxonomic position, a tidal pool bloom-forming dinoflagellate, Scrippsiella hexapraecingula was re-investigated using light, scanning and transmission electron microscopy together with a phylogenetic analysis based on concatenated ribosomal DNA sequences. The culture strains used in this study were established from intertidal rock pool samples taken from Jogashima, Kanagawa
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Simultaneous visualization of the actin plate and new cell partition membrane during cytokinesis in the brown alga Sphacelaria rigidula (Sphacelariales, Phaeophyceae) Phycol. Res. (IF 1.5) Pub Date : 2023-01-10 Hinako Aoki, Christos Katsaros, Taizo Motomura, Chikako Nagasato
In many brown algae, cytokinesis is accomplished through the centrifugal expansion of the membrane structure formed by the fusion of Golgi vesicles and flat cisternae. In contrast, it has been reported that cytokinesis in Sphacelaria rigidula progresses centripetally by adding Golgi vesicles and flat cisternae to cleaving furrows of the plasma membrane. The reason why this cytokinetic pattern was observed
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Corrigendum Phycol. Res. (IF 1.5) Pub Date : 2023-01-02
(Editorial Board of Phycological Research) 2022. Description of sampling location appearing in Phycological Research 70. Phycol. Res. 70: 76, DOI: 10.1111/pre.12482. The description regarding the sampling location was incorrect. Original version: “Holotype: RYU A0047 in the RYU (herbarium of the Faculty of Science, University of the Ryukyus, Okinawa, Japan) sampled an epilithic mat at Nashiro Beach
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Novelties in nomenclature and typification appearing in Phycological Research 71 (1). Phycol. Res. (IF 1.5) Pub Date : 2023-01-02
Prorocentrum pervagatum Tillmann, Hoppenrath & Gottschling sp. nov. Phycol. Res. 71 (online): [61]. 20 October 2022. Ulva vietnamensis L.-A.T. Tran, Leliaert & De Clerck sp. nov. Phycol. Res. 71 (online): [20]. 5 November 2022. No new typifications appearing in Phycological Research 71 (1) (“Typification” does not include type citations associated with new taxa). For details of the author citations
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Colpomenia borea sp. nov. (Scytosiphonaceae, Phaeophyceae) from Japan and Far East Russia Phycol. Res. (IF 1.5) Pub Date : 2022-12-22 Michael Jacob C. Dy, Masakazu Hoshino, Tsuyoshi Abe, Norishige Yotsukura, Nina Klochkova, Kyung Min Lee, Sung Min Boo, Kazuhiro Kogame
Colpomenia borea sp. nov. is described from Hokkaido, Japan and Magadan, Far East Russia based on morphological observations and molecular analyses using mitochondrial cox3 and chloroplast rbcL genes. This new species is distinguished from other Colpomenia by its small globular to ovoidal thallus up to 5 cm in diameter, and thin thallus membrane composed of a cortex of one to two-cell layers and a
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The effect of temperature, light-spectrum, desiccation and salinity gradients on the photosynthetic performance of a subtidal brown alga, Sargassum macrocarpum, from Japan Phycol. Res. (IF 1.5) Pub Date : 2022-12-13 Tomohiro Ito, Toui Yoshioka, Hiromori Shimabukuro, Gregory N. Nishihara, Hikaru Endo, Ryuta Terada
The effect of temperature, light-spectrum, desiccation and salinity gradients on the photosynthesis of a Japanese subtidal brown alga, Sargassum macrocarpum (Fucales), was determined using a pulse amplitude modulation-chlorophyll fluorometer and dissolved oxygen sensors. Temperature responses of the maximum (Fv/Fm in darkness) and effective (ΔF/Fm′ at 50 μmol photons m−2 s−1; = ΦPSII) quantum yields
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Genetic diversity of Cladophora oligocladoidea forming a bloom in the coastal area of Korea Phycol. Res. (IF 1.5) Pub Date : 2022-12-12 Soon Jeong Lee, Han Gil Choi, Ju Hee Kim, Eun-Young Lee, Sang-Rae Lee
Green algal blooms by Cladophora species are primarily reported in freshwater and coastal regions and cause severe ecological problems. A taxonomic report of the geographic distribution of Cladophora blooms is essential to explore the cause and impact of macroalgal blooms and for eco-physiological studies. The identification of blooming species is necessary for monitoring and controlling algal blooms
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Molecular assessment of Ulva (Ulvales, Chlorophyta) diversity in Vietnam including the new species U. vietnamensis Phycol. Res. (IF 1.5) Pub Date : 2022-11-05 Lan-Anh T. Tran, Frederik Leliaert, Christophe Vieira, Tien V. Tran, Tu V. Nguyen, Tien D. Dam, Olivier De Clerck
Species diversity of Ulva in Vietnam was investigated using three commonly used genetic markers, the nuclear encoded rDNA ITS region and the plastid encoded rbcL and tufA genes. Single locus species delimitation methods, complemented with morphological and ecological information resulted in the delimitation of 19 species. This diversity is largely incongruent with the traditional understanding of Ulva
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Prorocentrum pervagatum sp. nov. (Prorocentrales, Dinophyceae): A new, small, planktonic species with a global distribution Phycol. Res. (IF 1.5) Pub Date : 2022-10-20 Urban Tillmann, Stephan Wietkamp, Marc Gottschling, Mona Hoppenrath
Prorocentrum comprises a unique group of dinophytes with several apomorphic traits, such as an apical insertion of flagella and the presence of two major, large thecal plates. Species delimitation is challenging, especially for morphologically very similar, small planktonic species. Contemporary analyses, including SEM studies and molecular phylogenetics of type material, are not available for many
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Novelties in nomenclature and typification appearing in Phycological Research 70 (4) Phycol. Res. (IF 1.5) Pub Date : 2022-10-17
Asterocladon ednae E. Sasagawa, Santiañez & Kogame sp. nov. Phycol. Res. 70 (online): 187. 21 June 2022. Edaphophycus N. Lee, D. Kim, T. Kim, J. Ki & O. Lee gen. nov. Phycol. Res. 70 (online): 181. 26 July 2022. Edaphophycus epilithus N. Lee, D. Kim, T. Kim, J. Ki & O. Lee sp. nov. Phycol. Res. 70 (online): 181. 26 July 2022. Kuwaitiella A.H. Hasan, P. Van der Aa, F.C. Küpper, D. Al-Bader & A.F. Peters
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Bioinformatic analysis and relative expression of hyd and fdx during H2 production in microalgae Phycol. Res. (IF 1.5) Pub Date : 2022-09-20 Yahaira de Jesús Tamayo-Ordoñez, Benjamín Abraham Ayil-Gutiérrez, Ileana Mayela Maria Moreno-Davila, Francisco Alberto Tamayo-Ordoñez, Atl Victor Córdova-Quiroz, Wilberth Alfredo Poot-Poot, Siprian Damas-Damas, Hernán de Jesús Villanueva-Alonzo, Maria Concepción Tamayo-Ordoñez
Microalgae have been positioned as excellent models for producing new sources of energy (biofuels and biohydrogen). Some investigations in these biological models have been directed to know if the enzymes ferredoxin (FDX) and hydrogenase (HYD) are involved in the algae producing different concentrations of molecular hydrogen (H2). To date, little is known about the concomitant transcriptional regulation
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Seasonal and inter-annual variability in the heatwave tolerance of the kelp Saccharina latissima (Laminariales, Phaeophyceae) Phycol. Res. (IF 1.5) Pub Date : 2022-09-14 Sarina Niedzwiedz, Nora Diehl, Philipp Fischer, Kai Bischof
The geographical distribution of organisms, such as the foundation kelp species Saccharina latissima, is mainly driven by temperature. Globally increasing sea surface temperature and further intensification of marine heatwaves have already resulted in local extinction of kelp populations worldwide. In the present study, we investigated temporal variation in the thermal susceptibility of S. latissima
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Kuwaitiella rubra gen. et sp. nov. (Bangiales, Rhodophyta), a new filamentous genus and species from the north-western Indian Ocean Phycol. Res. (IF 1.5) Pub Date : 2022-07-28 Amal Hajiya Hasan, Pierrot Van der Aa, Frithjof C. Küpper, Dhia Al-Bader, Akira F. Peters
A new filamentous marine red alga, Kuwaitiella rubra gen. et sp. nov. (Bangiales, Rhodophyta), is described from Kuwait in the north-western Arabian Gulf (also referred to as the Persian Gulf). It was found on a submerged fishing line. The intensively red upright thallus of up to 1 cm in length consists of cells containing a single stellate plastid. The thallus is initially uniseriate but becomes biseriate
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Edaphophycus epilithus gen. et sp. nov. (Oscillatoriales, cyanobacteria) with a description of the morphology and molecular phylogeny Phycol. Res. (IF 1.5) Pub Date : 2022-07-26 Nam-Ju Lee, Taehee Kim, Do-Hyun Kim, Jang-Seu Ki, Ok-Min Lee
Two strains of subaerial cyanobacteria were collected from two locations of the Republic of Korea, one in Seoul and the other in Gyeonggi-do, both of which were studied using morphological and molecular traits. The genus Edaphophycus belonging to the family Coleofasciculaceae is morphologically very similar to the type genus Coleofasciculus and genus Kastovskya. However, in genera Coleofasciculus and
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Gene expression of a canopy-forming kelp, Eisenia bicyclis (Laminariales, Phaeophyceae), under high temperature stress Phycol. Res. (IF 1.5) Pub Date : 2022-07-13 Yoshino Hara, Yui Otake, Shingo Akita, Tomokazu Yamazaki, Fumio Takahashi, Shinya Yoshikawa, Satoshi Shimada
To understand the high temperature stress acclimation of a canopy-forming kelp, RNA-seq analysis was performed on cultured Eisenia bicyclis (Kjellman) Setchell (Laminariales, Phaeophyceae), a major component species of kelp forests along the coast of Japan. We established a culture strain from a population at the northernmost distribution limit of this species and measured photosystem II activity in
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Announcement Phycol. Res. (IF 1.5) Pub Date : 2022-07-01
Novelties in nomenclature and typification appearing in Phycological Research 70 (3). Clymene sutherlandiae W.A. Nelson sp. nov. Phycol. Res. 70 (online): [1 of 4]. 12 April 2022. No new typifications appearing in Phycological Research 70 (3) (“Typification” does not include type citations associated with new taxa). For details of the author citations and the publication dates, see Editorial Board
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Asterocladon ednae sp. nov. (Asterocladales, Phaeophyceae) from the Philippines Phycol. Res. (IF 1.5) Pub Date : 2022-06-21 Eriko Sasagawa, Wilfred John E. Santiañez, Kazuhiro Kogame
Members of the brown algal order Asterocladales are characterized by stellate arrangement of its chloroplasts, in which a stellate configuration has a protruding central pyrenoid complex. The order is represented by the genus Asterocladon, which consists of only three species so far. Similar to other small and filamentous seaweeds, studies on Asterocladon remain scant and their diversity poorly understood
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Development of DNA markers that distinguish male and female haploid germlings of the brown alga, Cladosiphon okamuranus Phycol. Res. (IF 1.5) Pub Date : 2022-06-08 Koki Nishitsuji, Yoshie Nishitsuji, Yoshitaka Yonashiro, Noriyuki Satoh
Okinawa mozuku, Cladosiphon okamuranus, is one of many edible brown algae, yielding 22 Kton annually and contributing ¥5 billion to the Japanese economy. The life cycle of C. okamuranus is complicated, since the alga has self-cloning life cycles in both haploid (N, male and female) and diploid (2N) conditions, but only diploid “seeds” (germlings) become edible sporophytes. Because haploid and diploid
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The effects of desiccation and salinity gradients on the PSII photochemical efficiency of an intertidal brown alga, Sargassum fusiforme from Kagoshima, Japan Phycol. Res. (IF 1.5) Pub Date : 2022-06-06 Yukiko Yonemori, Shogo Kokubu, Gregory N. Nishihara, Hikaru Endo, Ryuta Terada
The responses of photochemical efficiency to desiccation and salinity gradients in an intertidal edible brown macroalga, Sargassum fusiforme (Harvey) Setchell (Sargassaceae, Fucales), were determined using a pulse amplitude modulation (PAM)-chlorophyll fluorometer. The effective quantum yields (ΔF/Fm'; = ΦPSII) of photosystem II (PSII) dropped to zero after 360-min aerial exposure under low irradiance
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Selective utilization of phosphorus compounds by Chaetoceros tenuissimus (Bacillariophyceae): Approach using 31P nuclear magnetic resonance analysis Phycol. Res. (IF 1.5) Pub Date : 2022-05-19 Haruo Yamaguchi, Masaki Zaima, Masao Adachi, Yuji Tomaru, Haruyasu Asahara, Nagatoshi Nishiwaki
Several diatom species can utilize various forms of organic phosphorus via enzymatic hydrolysis. The present study identified which phosphorus compounds are preferentially utilized by planktonic diatom Chaetoceros tenuissimus cultures using a 31P nuclear magnetic resonance (NMR)-based method. Our 31P NMR analysis, which involves a sample extraction procedure using DIAION™ CR11, detected and quantified
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Galactolipid composition of Gertia stigmatica (Dinophyceae), an atypical member of the Kareniaceae with a peridinin-containing, non-haptophyte-derived plastid Phycol. Res. (IF 1.5) Pub Date : 2022-04-26 Jeffrey D. Leblond, Kyra Sabir, Jori E. Graeff
Gertia stigmatica is an atypical member of the Kareniaceae that has a peridinin-containing plastid rather than a tertiary, (acyloxy)fucoxanthin-containing, haptophyte-derived plastid, as is found in the canonical genera Karenia, Karlodinium, and Takayama. While the origin of G. stigmatica's plastid is uncertain per its original published description, with alternative hypotheses stating that it could
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Clymene sutherlandiae sp. nov.: A new species of Bangiales (Rhodophyta) from the southern hemisphere Phycol. Res. (IF 1.5) Pub Date : 2022-04-12 Wendy A. Nelson
A new species of the southern hemisphere genus Clymene, C. sutherlandiae, is described based on collections from the Otago coast, south east South Island of New Zealand, and from a site in western Tasmania. Found on mid-upper intertidal rocks on open coasts, and frequently adjacent to sandy shores, this is a second species for the genus, previously known solely from the type species C. coleana found
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Novelties in nomenclature and typification appearing in Phycological Research 70 (2) Phycol. Res. (IF 1.5) Pub Date : 2022-04-06
Dasya japonovillosa Y. Yamagishi, Kogame & Masuda sp. nov. Phycol. Res. 70 (online): [2 of 11]. 10 January 2022. Neolyngbya intertidalis H. Nuryadi & S. Suda sp. nov. Phycol. Res. 70 (online): [5 of 12]. 1 March 2022. Neolyngbya latusa H. Nuryadi & S. Suda sp. nov. Phycol. Res. 70 (online): [8 of 12]. 1 March 2022. No new typifications appearing in Phycological Research 70 (2) (‘Typification’ does