Comparison of UVB effects on growth and induction of UVB screening compounds in isolates of metaphytic algae from temperate zone streams and ponds.

abstract：:Species currently classified within the cyanobacterial genus Microcoleus were determined to fall into two distinct clades in a 16S rDNA phylogeny, one containing taxa within the Oscillatoriaceae, the other containing taxa within the Phormidiaceae. The two lineages were confirmed in an analysis of the 16S-23S internal ...

journal_title：Journal of phycology

authors： Siegesmund MA,Johansen JR,Karsten U,Friedl T

更新日期：2008-12-01 00:00:00

abstract：:We examined the diurnal expression of five genes encoding nitrogen-assimilating enzymes in the marine diatom Thalassiosira pseudonana (Hust.) Hasle et Heimdal following a transition from NH4 (+) - to NO3 (-) -supplemented media. The accumulation of nia transcripts (encoding nitrate reductase, NR) following the transit...

journal_title：Journal of phycology

authors： Brown KL,Twing KI,Robertson DL

更新日期：2009-04-01 00:00:00

abstract：:Proliferating cell nuclear antigen (PCNA) plays critical roles in eukaryotic DNA replication and replication-associated processes. It is typically encoded by one or two gene copies (pcna) in eukaryotic genomes. Recently reported higher copy numbers of pcna in some dinoflagellates raised a question of how this gene has...

journal_title：Journal of phycology

authors： Hou Y,Ji N,Zhang H,Shi X,Han H,Lin S

更新日期：2019-02-01 00:00:00

abstract：:Exopolymer particles are found throughout the ocean and play a significant biogeochemical role in carbon cycling. Transparent exopolymer particles (TEP) are composed of acid polysaccharides, and Coomassie staining particles (CSP) are proteins. TEPs have been extensively studied in the ocean, while CSP have been largel...

journal_title：Journal of phycology

authors： Thornton DCO,Chen J

更新日期：2017-04-01 00:00:00

abstract：:Cysts belonging to the benthic dinoflagellate Bysmatrum subsalsum were recovered from palynologically treated sediments collected in the Alvarado Lagoon (southwestern Gulf of Mexico). The cysts are proximate, reflecting the features of the parent thecal stage, and their autofluorescence implies a dinosporin compositio...

journal_title：Journal of phycology

authors： Limoges A,Mertens KN,Ruíz-Fernández AC,de Vernal A

更新日期：2015-02-01 00:00:00

abstract：:Biotic factors that affect phytoplankton physiology and behavior are not well characterized but probably play a crucial role in regulating their population dynamics in nature. We document evidence that some marine bacteria can decrease the swimming speed of motile phytoplankton through the release of putative protease...

journal_title：Journal of phycology

authors： Mayali X,Franks PJ,Tanaka Y,Azam F

更新日期：2008-08-01 00:00:00

abstract：:Since the first phylogenetic study of the order Batrachospermales, Batrachospermum was shown to be paraphyletic. Subsequently, sections of the genus have been methodically investigated using DNA sequences and morphology in order to propose new genera and delineate species. Batrachospermum section Turfosa is the last s...

journal_title：Journal of phycology

authors： Vis ML,Lee J,Eloranta P,Chapuis IS,Lam DW,Necchi O Jr

更新日期：2020-08-01 00:00:00

abstract：:Based upon COI-5P, LSU rDNA, and rbcL sequence data and morphological characteristics, six new members of the noncalcified crustose genus of red algae Ethelia are described in a new family, Etheliaceae (Gigartinales), sister to the recently described Ptilocladiopsidaceae. The novel species are described from subtropic...

journal_title：Journal of phycology

authors： Dixon KR,Saunders GW,Schneider CW,Lane CE

更新日期：2015-12-01 00:00:00

abstract：:CO2 levels in freshwater systems can fluctuate widely, potentially influencing photosynthetic rates and growth of phytoplankton. Given the right conditions, this can lead to bloom formation and affect water quality. This study investigated the acquisition of dissolved inorganic carbon (DIC) by six species of microalga...

journal_title：Journal of phycology

authors： Lines T,Beardall J

更新日期：2018-10-01 00:00:00

abstract：:Species diversity within the genus Osmundea in the Macaronesian region was explored by conducting a comprehensive sampling in the Azores, the Canary, and the Madeira archipelagos. Toward identification, all specimens were first observed alive to verify the absence of corps en cerise, a diagnostic character for the gen...

journal_title：Journal of phycology

authors： Machín-Sánchez M,Rousseau F,Le Gall L,Cassano V,Neto AI,Sentíes A,T Fujii M,Gil-Rodríguez MC

更新日期：2016-08-01 00:00:00

abstract：:Antarctica is one of the most difficult habitats for sustaining life on earth; organisms that live there have developed different strategies for survival. Among these organisms is the green alga Prasiola crispa, belonging to the class Trebouxiophyceae. The literature on P. crispa taxonomy is scarce, and many gaps in t...

journal_title：Journal of phycology

authors： Carvalho EL,Wallau GL,Rangel DL,Machado LC,Pereira AB,Victoria FC,Boldo JT,Pinto PM

更新日期：2017-08-01 00:00:00

abstract：:Euglena obtusa F. Schmitz possesses novel pellicle surface patterns, including the greatest number of strips (120) and the most posterior subwhorls of strip reduction in any euglenid described so far. Although the subwhorls form a mathematically linear pattern of strip reduction, the pattern observed here differs from...

journal_title：Journal of phycology

authors： Esson HJ,Leander BS

更新日期：2008-02-01 00:00:00

abstract：:Two new gynandrosporous species of Oedocladium from the United States were isolated into unialgal culture and comparative studies were made. The new taxa described, O. carolinianum sp. nov. and O. cir-ratum sp. nov., are morphologically very similar. Both species have an opercufate oogonium with inferior division, oos...

journal_title：Journal of phycology

authors： Beaney WD,Hoffman LR

更新日期：1968-09-01 00:00:00

abstract：:Twelve species, representing 12 families of the chrysophytes sensu lato, were tested for their ability to take up inorganic carbon. Using the pH-drift technique, CO2 compensation points generally varied between 1 and 20 μmol · L(-1) with a mean concentration of 5 μmol · L(-1) . Neither pH nor alkalinity affected the C...

journal_title：Journal of phycology

authors： Maberly SC,Ball LA,Raven JA,Sültemeyer D

更新日期：2009-10-01 00:00:00

abstract：:The earliest known diatom fossils with well-preserved siliceous frustules are from Lower Cretaceous neritic marine deposits in Antarctica. In this study, we analyzed the cell wall structure to establish whether their cell and life cycles were similar to modern forms. At least two filamentous species (Basilicostephanus...

journal_title：Journal of phycology

authors： Jewson DH,Harwood DM

更新日期：2017-06-01 00:00:00

abstract：:Light/scanning electron/transmission microscopy-based morphological analyses and multiple nucleotide sequences-based molecular phylogenetic analyses are used to identify and assess the phylogenetic position of a new unidentified green alga isolated from bleached corals living in the South China Sea. This new unidentif...

journal_title：Journal of phycology

authors： Gong S,Li Z,Zhang F,Xiao Y,Cheng H

更新日期：2018-12-01 00:00:00

abstract：:The formation of archeospores is characteristic of Porphyra yezoensis Ueda and is important for Porphyra aquaculture. Recently, it has been regarded as a valuable seed source for propagation of thalli in mariculture. Cell wall composition changes are associated with archeospore formation in P. yezoensis. Here, we repo...

journal_title：Journal of phycology

authors： Gao S,Wang G,Yang R,Xie X,Pan G,Xu P,Zhu J

更新日期：2011-08-01 00:00:00

abstract：:Chlorella-like coccoid green algae are widely distributed in almost all terrestrial habitats and belong to different lineages of the Chlorophyceae and Trebouxiophyceae. The Watanabea clade of the Trebouxiophyceae shows a high genetic biodiversity. Re-investigation of the authentic strain of the rarely found W. renifor...

journal_title：Journal of phycology

authors： Darienko T,Pröschold T

更新日期：2019-04-01 00:00:00

abstract：:Characeae (Charophyceae, Charophyta) contains two tribes with six genera: tribe Chareae with four genera and tribe Nitelleae, which includes Tolypella and Nitella. This paper uses molecular and morphological data to elucidate the phylogeny of Tolypella species in North America. In the most comprehensive taxonomic trea...

journal_title：Journal of phycology

authors： Stancheva R,Hall JD,Herburger K,Lewis LA,McCourt RM,Sheath RG,Holzinger A

更新日期：2014-10-01 00:00:00

abstract：:A new marine benthic, sand-dwelling Prorocentrum species from the temperate region of the Pacific coast of British Columbia, Canada, is described using LM and EM and molecular phylogenetic analyses. The cells have a broad oval shape, 40.0-55.0 μm long and 30.0-47.5 μm wide, and a wide U-shaped periflagellar area on th...

journal_title：Journal of phycology

authors： Hoppenrath M,Leander BS

更新日期：2008-04-01 00:00:00

abstract：:Takayama helix is a mixotrophic dinoflagellate that can feed on diverse algal prey. We explored the effects of light intensity and water temperature, two important physical factors, on its autotrophic and mixotrophic growth rates when fed on Alexandrium minutum CCMP1888. Both the autotrophic and mixotrophic growth rat...

journal_title：Journal of phycology

authors： Ok JH,Jeong HJ,Lim AS,You JH,Kang HC,Kim SJ,Lee SY

更新日期：2019-10-01 00:00:00

abstract：:This study aimed to isolate quercetin (for the first time) from Anabaena aequalis Borge, which inhabits soil surface of Wadi El-Alaqui Protectorate located in Aswan city, Egypt. The isolated compound showed significant antibacterial activity against the gram-positive bacteria Sarcina maxima and Micrococcus kristinae, ...

journal_title：Journal of phycology

authors： Abdel-Raouf N,Ibraheem IB,Abdel-Tawab S,Naser YA

更新日期：2011-08-01 00:00:00

abstract：:To study the effect of different radiation conditions on sporogenesis of Laminaria digitata (Huds.) J. V. Lamour., excised disks were induced to form sporangia under PAR (P), PAR + ultraviolet-A (UVA) (PA), and PAR + UVA + ultraviolet-B (UVB) (PAB) conditions in the laboratory. Vitality of meiospores, released from so...

journal_title：Journal of phycology

authors： Gruber A,Roleda MY,Bartsch I,Hanelt D,Wiencke C

更新日期：2011-06-01 00:00:00

abstract：:Global climate change is expected to alter the polar bioregions faster than any other marine environment. This study assesses the biodiversity of seaweeds and associated eukaryotic pathogens of an established study site in northern Baffin Island (72° N), providing a baseline inventory for future work assessing impacts...

journal_title：Journal of phycology

authors： Küpper FC,Peters AF,Shewring DM,Sayer MD,Mystikou A,Brown H,Azzopardi E,Dargent O,Strittmatter M,Brennan D,Asensi AO,van West P,Wilce RT

更新日期：2016-08-01 00:00:00

abstract：:The publication of a mini-review by Olivier De Clerck et al. in this issue of the Journal of Phycology presented an opportunity to open a dialogue on challenges faced by contemporary algal taxonomists. The Editorial Office solicited the following two additional contributions in response to De Clerck et al.'s paper; th...

journal_title：Journal of phycology

authors： Druehl L

更新日期：2013-04-01 00:00:00

abstract：:The molecular structure of the carotenoid lactoside P457, (3S,5R,6R,3'S,5'R,6'S)-13'-cis-5,6-epoxy-3',5'-dihydroxy-3-(β-d-galactosyl-(1→4)-β-d-glucosyl)oxy-6',7'-didehydro-5,6,7,8,5',6'-hexahydro-β,β-caroten-20-al, was confirmed by spectroscopic methods using Symbiodinium sp. strain NBRC 104787 cells isolated from a s...

journal_title：Journal of phycology

authors： Wakahama T,Laza-Martínez A,Bin Haji Mohd Taha AI,Okuyama H,Yoshida K,Kogame K,Awai K,Kawachi M,Maoka T,Takaichi S

更新日期：2012-12-01 00:00:00

abstract：:The study of the microalgal growth kinetics is an indispensable tool in all fields of phycology. Knowing the optimal nutrient concentration is an important issue that will help to develop efficient growth systems for these microorganisms. Although nitrogen and phosphorus are well studied for this purpose, sulfur seems...

journal_title：Journal of phycology

authors： Mera R,Torres E,Abalde J

更新日期：2016-02-01 00:00:00

abstract：:In batch cultures of four Mediterranean strains (from France, Italy, and Spain) of Alexandrium catenella (Whedon et Kof.) Balech growing on a daily light cycle, ammonium and urea uptake were estimated by the (15) N tracer technique. Ammonium uptake could be described by Michaelis-Menten kinetics along a substrate grad...

journal_title：Journal of phycology

authors： Jauzein C,Collos Y,Garcés E,Vila M,Maso M

更新日期：2008-10-01 00:00:00

abstract：:Some abiotic conditions are well known to play disproportionately large roles in shaping contemporary assemblages, yet their roles may not continue to have similar magnitudes of effect into the future. We tested whether forecasted levels of CO2 could alter the strength of influence of an abiotic factor (i.e., light in...

journal_title：Journal of phycology

authors： Russell BD,Passarelli CA,Connell SD

更新日期：2011-08-01 00:00:00

abstract：:Ulva Linnaeus (Ulvophyceae, Ulvales) is a genus of green algae widespread in different aquatic environments. Members of this genus show a very simple morphology and a certain degree of phenotypic plasticity, heavily influenced by environmental conditions, making difficult the delineation of species by morphological fe...

journal_title：Journal of phycology

authors： Wolf MA,Sciuto K,Andreoli C,Moro I

更新日期：2012-12-01 00:00:00