Abstract：
:Crocosphaera watsonii, a unicellular nitrogen-fixing cyanobacterium found in oligotrophic oceans, is important in marine carbon and nitrogen cycles. Isolates of C. watsonii can be separated into at least two phenotypes with environmentally important differences, indicating possibly distinct ecological roles and niches. To better understand the evolutionary history and variation in metabolic capabilities among strains and phenotypes, this study compared the genomes of six C. watsonii strains, three from each phenotypic group, which had been isolated over several decades from multiple ocean basins. While a substantial portion of each genome was nearly identical to sequences in the other strains, a few regions were identified as specific to each strain and phenotype, some of which help explain observed phenotypic features. Overall, the small-cell type strains had smaller genomes and a relative loss of genetic capabilities, while the large-cell type strains were characterized by larger genomes, some genetic redundancy, and potentially increased adaptations to iron and phosphorus limitation. As such, strains with shared phenotypes were evolutionarily more closely related than those with the opposite phenotype, regardless of isolation location or date. Unexpectedly, the genome of the type-strain for the species, C. watsonii WH8501, was quite unusual even among strains with a shared phenotype, indicating it may not be an ideal representative of the species. The genome sequences and analyses reported in this study will be important for future investigations of the proposed differences in adaptation of the two phenotypes to nutrient limitation, and to identify phenotype-specific distributions in natural Crocosphaera populations.
journal_name
J Phycoljournal_title
Journal of phycologyauthors
Bench SR,Heller P,Frank I,Arciniega M,Shilova IN,Zehr JPdoi
10.1111/jpy.12090subject
Has Abstractpub_date
2013-08-01 00:00:00pages
786-801issue
4eissn
0022-3646issn
1529-8817journal_volume
49pub_type
杂志文章abstract：:Gracilariaceae has a worldwide distribution including numerous economically important species. We applied high-throughput sequencing to obtain organellar genomes (mitochondria and chloroplast) from 10 species of Gracilariaceae and, combined with published genomes, to infer phylogenies and compare genome architecture a...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12765
更新日期：2018-12-01 00:00:00
abstract：:Comparisons of the 3 previously used methods (continuous flow centrifugation, Millipore®filtration, and biodialysis) for making water samples seston-free before analysis for cobalamins point to several likely sources of error: (a) unpredictable occlusion of pores in Millipore®membranes during filtration; (b) irreversi...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.1969.tb02590.x
更新日期：1969-06-01 00:00:00
abstract：:Recently radiated dinoflagellates Apocalathium aciculiferum (collected in Lake Erken, Sweden), Apocalathium malmogiense (Baltic Sea) and Apocalathium aff. malmogiense (Highway Lake, Antarctica) represent a lineage with an unresolved phylogeny. We determined their phylogenetic relationships using phylotranscriptomics b...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12748
更新日期：2018-08-01 00:00:00
abstract：:Since the 1970s, Puget Sound, Washington State, USA, has experienced an increase in detections of paralytic shellfish toxins (PSTs) in shellfish due to blooms of the harmful dinoflagellate Alexandrium. Natural patterns of climate variability, such as the Pacific Decadal Oscillation (PDO), and changes in local environm...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2012.01175.x
更新日期：2012-06-01 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
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2011.01003.x
更新日期：2011-08-01 00:00:00
abstract：:Brown tides of the marine pelagophyte Aureococcus anophagefferens Hargraves et Sieburth have been investigated extensively for the past two decades. Its growth is fueled by a variety of nitrogen (N) compounds, with dissolved organic nitrogen (DON) being particularly important during blooms. Characterization of a cDNA ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2008.00571.x
更新日期：2008-10-01 00:00:00
abstract：:The fine structure of the marine coccolithophorid Hymenomonas (Cricosphaera) carterae (Braarud & Fagerland) Manton & Peterfi is reported. Details of the formation of the circular organic body scales are presented. Their formation is shown to be closely linked with the presence of tubules found within the Golgi cistern...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.1969.tb02621.x
更新日期：1969-12-01 00:00:00
abstract：:Temporal and spatial variations in Sargassum ilicifolium thallus density and length were investigated on equatorial coral reefs in Singapore from November 2011 to October 2012. Thalli density varied little throughout the year, however, we found strong seasonal patterns in thallus length and identified temperature as t...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12818
更新日期：2019-04-01 00:00:00
abstract：:The role of dissolved inorganic phosphorus (DIP) in promoting dominance of the toxic nitrogen (N)-fixing cyanobacterium Cylindrospermopsis raciborskii (Wołosz.) Seenayya et Subba Raju was examined in a subtropical water reservoir, Lake Samsonvale (=North Pine reservoir). A novel in situ bioassay approach, using dialys...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2009.00675.x
更新日期：2009-06-01 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
pub_type： 杂志文章
doi：10.1111/jpy.12815
更新日期：2019-02-01 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
pub_type： 杂志文章
doi：10.1111/j.1529-8817.1968.tb04719.x
更新日期：1968-09-01 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
pub_type： 杂志文章
doi：10.1111/jpy.12830
更新日期：2019-04-01 00:00:00
abstract：:The presence of the benthic dinophysoid dinoflagellate Sinophysis canaliculata has been reported in the Canary Islands (eastern central Atlantic) in live field observations and on fixed macroalgal samples from intertidal ponds (26 sampling sites from El Hierro, Tenerife, Gran Canaria, Fuerteventura and Lanzarote islan...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12508
更新日期：2017-04-01 00:00:00
abstract：:Central America is one of the most important biodiversity hot spots in the world, and Costa Rican microbial communities from thermal springs are the best characterized in the isthmus. Miravalles is an inactive quaternary stratovolcano, and the Rincón de la Vieja is a unique active volcano, in whose slopes diverse hydr...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.13077
更新日期：2020-09-30 00:00:00
abstract：:The quantitative characterization of the ecology of individual phytoplankton taxa is essential for model resolution of many aspects of aquatic ecosystems. Existing literature cannot directly parameterize all phytoplankton taxa of interest, as many traits and taxa have not been sampled. However, valuable clues on the v...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2010.00946.x
更新日期：2011-02-01 00:00:00
abstract：:We tested how the availability of carbon and nitrogen determines both the production of Asparagopsis taxiformis (Delile) V. Trevis. and content of the two major halocarbons, bromoform and dibromoacetic acid. The halogenated secondary metabolites of Asparagopsis species are particularly interesting from an applied pers...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2011.01083.x
更新日期：2012-02-01 00:00:00
abstract：:Large-scale seaweed cultivation has been instrumental in globalizing the seaweed industry since the 1950s. The domestication of seaweed cultivars (begun in the 1940s) ended the reliance on natural cycles of raw material availability for some species, with efforts driven by consumer demands that far exceeded the availa...
journal_title：Journal of phycology
pub_type： 杂志文章,评审
doi：10.1111/jpy.12326
更新日期：2015-10-01 00:00:00
abstract：:Thermoacidophilic cyanidia (Cyanidiales) are the primary photosynthetic eukaryotes in volcanic areas. These red algae also serve as important model organisms for studying life in extreme habitats. The global biodiversity and community structure of Cyanidiales remain unclear despite previous sampling efforts. Here, we ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12310
更新日期：2015-08-01 00:00:00
abstract：:Gene duplication is an important evolutionary process that allows duplicate functions to diverge, or, in some cases, allows for new functional gains. However, in contrast to the nuclear genome, gene duplications within the chloroplast are extremely rare. Here, we present the chloroplast genome of the photosynthetic pr...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12531
更新日期：2017-06-01 00:00:00
abstract：:Although light and salt stresses are known to enhance the biosynthesis of astaxanthin in certain green algae, the mechanism of their action remains largely unknown. Here we report the regulation of the genes encoding phytoene desaturase (PDS), carotenoid hydroxylase (CHYb), and carotenoid ketolase (BKT) in the green a...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2009.00689.x
更新日期：2009-06-01 00:00:00
abstract：:New molecular and morphological insights are presented on Campylosira africana and two new species, Extubocellulus cupola sp. nov. and Plagiogrammopsis castigatus sp. nov. Species descriptions were based on LM/SEM micrographs and a data set with concatenated sequences of SSU, rbcL and psbC loci constructed from 56 cym...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12831
更新日期：2019-04-01 00:00:00
abstract：:Cytological changes induced by nitrate or phosphate limitation were reproducible and readily visible by phase contrast microscopy in Coscinodiscus wailesii, Ditylum brightwellii, Rhizosolenia hebetata f. semi-spina, Skeletonema costatum, and Stephanopyxis turris. These effects included changes in chromatophore number ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.1966.tb04610.x
更新日期：1966-12-01 00:00:00
abstract：:Alaria grandifolia is recorded from Nova Scotia for the first time and is briefly compared with A. esculenta from this area. ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.1967.tb04620.x
更新日期：1967-03-01 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
pub_type： 杂志文章
doi：10.1111/jpy.12367
更新日期：2016-02-01 00:00:00
abstract：:Photosynthetic dinoflagellates are ecologically and biogeochemically important in marine and freshwater environments. However, surprisingly little is known of how this group acquires inorganic carbon or how these diverse processes evolved. Consequently, how CO2 availability ultimately influences the success of dinofla...
journal_title：Journal of phycology
pub_type： 杂志文章,评审
doi：10.1111/jpy.13050
更新日期：2020-07-11 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
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2008.00483.x
更新日期：2008-04-01 00:00:00
abstract：:Invasions by nonindigenous macroalgal species (NIMS) potentially cause severe impacts on native species. We conducted a meta-analysis of 18 field-based manipulative experiments to quantify the direction and magnitude of impacts (Hedges effect size d, hereafter ES). We found significant small-to-medium negative effects...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2009.00709.x
更新日期：2009-08-01 00:00:00
abstract：:Light has been identified as one of the main factors affecting seaweed ecophysiology. We investigated the dependence of nutrient metabolism on sun and shade light conditions and whether episodes of upwelling of nutrient-rich subsuperficial water could reduce the summer nutrient limitation driving physiological changes...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2007.00440.x
更新日期：2008-02-01 00:00:00
abstract：:We investigated the relationship between daily growth rates and diel variation of carbon (C) metabolism and C to nitrogen (N) ratio under P- and N-limitation in the green algae Chlorella autotrophica. To do this, continuous cultures of C. autotrophica were maintained in a cyclostat culture system under 14:10 light:dar...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12254
更新日期：2015-02-01 00:00:00
abstract：:Over the last two decades, many studies on functional morphology have suggested that material properties of seaweed tissues may influence their fitness. Because hydrodynamic forces are likely the largest source of mortality for seaweeds in high wave energy environments, tissues with material properties that behave fav...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2011.01066.x
更新日期：2011-12-01 00:00:00
