Abstract:
:Partitioning of the carbon (C) fixed during photosynthesis between neutral lipids (NL) and carbohydrates was investigated in Isochrysis sp. (Haptophyceae) in relation to its nitrogen (N) status. Using batch and nitrate-limited continuous cultures, we studied the response of these energy reserve pools to both conditions of N starvation and limitation. During N starvation, NL and carbohydrate quotas increased but their specific growth rates (specific rates of variation, μCAR and μNL ) decreased. When cells were successively deprived and then resupplied with NO3 , both carbohydrates and neutral lipids were inversely related to the N quota (N:C). These negative relationships were not identical during N impoverishment and replenishment, indicating a hysteresis phenomenon between N and C reserve mobilizations. Cells acclimated to increasing degrees of N limitation in steady-state chemostat cultures showed decreasing NL quota and increasing carbohydrate quota. N starvation led to a visible but only transient increase of NL productivity. In continuous cultures, the highest NL productivity was obtained for the highest experimented dilution rate (D = 1.0 d(-1) ; i.e., for non N-limited growth conditions), whereas the highest carbohydrate productivity was obtained at D = 0.67 d(-1) . We used these results to discuss the nitrogen conditions that optimize NL productivities in the context of biofuel production.
journal_name
J Phycoljournal_title
Journal of phycologyauthors
Lacour T,Sciandra A,Talec A,Mayzaud P,Bernard Odoi
10.1111/j.1529-8817.2012.01154.xsubject
Has Abstractpub_date
2012-06-01 00:00:00pages
647-56issue
3eissn
0022-3646issn
1529-8817journal_volume
48pub_type
杂志文章abstract::It has been shown that marine algae produce the compatible solute dimethylsulfoniopropionate (DMSP) from methionine (Met) via four enzymatic reactions in which the third step, synthesis of 4-dimethylsulfonio-2-hydroxy-butyrate (DMSHB) from 4-methylthio-2-hydroxybutyrate (MTHB), is the committing step. However, regulat...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.00977.x
更新日期:2011-06-01 00:00:00
abstract::A previously unknown species of kelp was collected on Kagamil Island, Aleutian Islands. The species can be easily distinguished from any known laminarialean alga: the erect sporophytic thallus is composed of a thin lanceolate blade attaining ∼2 m in height and ∼0.50 m in width, without midrib, and the edge of the blad...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00548.x
更新日期:2008-08-01 00:00:00
abstract::Several unknown mycosporine-like amino acids (MAAs) have been previously isolated from some cultured species of toxic dinoflagellates of the Alexandrium genus (Dinophyceae). One of them, originally called M-333, was tentatively identified as a shinorine methyl ester, but the precise nature of this compound is still un...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12076
更新日期:2013-08-01 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
abstract::Diatoms are perhaps the most diverse lineage of eukaryotic algae, with their siliceous cell wall and diplontic life history often considered to have played important roles in their extraordinary diversification. The characteristic diminution of the diatom cell wall over the course of vegetative growth provides a relia...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12222
更新日期:2014-12-01 00:00:00
abstract::Worldwide, macroalgae have invaded near-shore marine ecosystems. However, their haplodiplontic life cycles have complicated efforts to predict patterns of growth and spread, particularly since most theoretical predictions are derived from diplontic taxa (i.e., animals). To complete one revolution of the life cycle, tw...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.13011
更新日期:2020-08-01 00:00:00
abstract::In culture tetraspores of the sporophyte (Trailliella intricata) of Sonnemaisonia hamifera gave rise to male gametophytes only. In the Gulf of St. Lawrence tetrasporangia occur annually during the autumn, but mature gametophytes have not been recorded. However, gametophytes with antheridia were found during the winter...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.1969.tb02605.x
更新日期:1969-09-01 00:00:00
abstract::We investigated the effects of zinc or lead on growth and on exudation of fluorescent dissolved organic matter (FDOM) by the marine toxic dinoflagellate Alexandrium catenella (Whedon & Kofoid) Balech. The species was exposed to increasing free zinc (1.34 × 10(-7) M-3.98 × 10(-6) M) or lead (5.13 × 10(-9) M-1.82 × 10(-...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12181
更新日期:2014-08-01 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 inability to thoroughly examine diatom type material existing only in resin-mounted permanent slides is a common frustration for diatomologists. Here, we present an efficient, inexpensive, and straightforward technique to extract siliceous exoskeletons of diatoms from permanent slides prepared with commonly used m...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.13122
更新日期:2020-12-19 00:00:00
abstract::Polytomella is a genus of colorless green algae in the Reinhardtinia clade of the Chlamydomonadales, which has proven useful for a broad range of studies particularly those exploring the evolutionary loss of photosynthesis and mitochondrial genomics/biochemistry. Although 13 Polytomella strain accessions are currently...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12430
更新日期:2016-08-01 00:00:00
abstract::Pacific coast species of the red algae Halymenia and Cryptonemia are described Of the 8 previously reported species of Halymenia 3 (H. abyssicola Dawson, H. megaspore Dawson, H refugiensis Dawson) hive been placed in synonymy with other species. Halymenia hollenbergii from southern California is described as new; H co...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.1967.tb04648.x
更新日期:1967-09-01 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
pub_type: 杂志文章
doi:10.1111/jpy.12779
更新日期:2018-12-01 00:00:00
abstract::Prochlorococcus is a ubiquitous marine oxyphotobacterium characterized by the presence of DV-chl a and b. In addition, the type strain Prochlorococcus marinus Chisholm et al. CCMP 1375 (or SS120), an isolate from the Sargasso Sea, contains low levels of an unusual phycoerythrin. Until now, it has been unclear if phyco...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1046/j.1529-8817.2000.99203.x
更新日期:2000-08-26 00:00:00
abstract::Due to their ecological, physiological, and molecular adaptations to low and varying temperatures, as well as varying seasonal irradiances, polar non-marine eukaryotic microalgae could be suitable for low-temperature biotechnology. Adaptations include the synthesis of compounds from different metabolic pathways that p...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12953
更新日期:2020-04-01 00:00:00
abstract::Light availability is a fundamental factor that controls the productivity and distribution of macroalgae and is highly variable, both spatially and temporally, in subtidal coastal systems. Our comprehension of how macroalgae respond to such variability is a significant knowledge gap that limits our understanding of ho...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12884
更新日期:2019-08-01 00:00:00
abstract::Here, we established the cyst-motile stage relation-ship for Spiniferites pachydermus through incubation of cysts with a characteristically microreticulate/perforate surface isolated from Izmir Bay in the eastern Aegean Sea of the eastern Mediterranean. The morphology of the motile stage was similar to Gonyaulax spini...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12304
更新日期:2015-06-01 00:00:00
abstract::Reactive oxygen species (ROS) produced by an oxidative burst are an important component of the wound response in algae, vascular plants, and animals. In all taxa, ROS production is usually attributed solely to a defense-related enzyme like NADPH-oxidase (Nox). However, here we show that the initial, wound-induced oxid...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12302
更新日期:2015-06-01 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
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2009.00734.x
更新日期:2009-10-01 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::Coralline red algae play a key role in the ecology of near shore marine ecosystems and are increasingly being used to study the effects of climate change in the marine environment. Corallines are very difficult to identify to species, and even to genus, using morpho-anatomy, likely complicating studies of their ecolog...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12205
更新日期:2014-08-01 00:00:00
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
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00604.x
更新日期:2008-12-01 00:00:00
abstract::The chloroplast pigments of 2 species of Chloro-monadophyceae have been examined. Both Gonyo-stomum semen and Vacuolaria virescens possessed only one chlorophyll, chlorophyll a. Gonyostomum contained 4 carotenoids, but not fucoxanthin and peridinin. Vacuolaria also possessed 4 carotenoids which have been identified as...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.1966.tb04599.x
更新日期:1966-06-01 00:00:00
abstract::Eukaryotes such as plants and the unicellular green alga Chlamydomonas reinhardtii P. A. Dang. produce and secrete compounds that mimic N-acyl homoserine lactone (AHL) bacterial quorum-sensing (QS) signals and alter QS-regulated gene expression in the associated bacteria. Here, we show that the set of C. reinhardtii s...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01049.x
更新日期:2011-10-01 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
pub_type: 杂志文章
doi:10.1111/jpy.12417
更新日期:2016-08-01 00:00:00
abstract::Macromolecular variability in microalgal populations subject to different nutrient environments was investigated, using the chlorophyte alga Scenedesmus quadricauda (Turpin) Bréb. as a model organism. The large size of the four-cell coenobia in the strain used in this study (∼35 μm diameter) conveniently allowed high ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00564.x
更新日期:2008-10-01 00:00:00
abstract::A giant form of Anadyomene, most similar to Anadyomene pavonina (J. Agardh) Wille, a rare and diminutive alga endemic to Florida, appeared as up to 10 m long net-like strands covering 10%-80% of a 0.5 km region of the 25-50 m deep Belizean outer reef slope where none had been present up to 12 months earlier. This new ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01108.x
更新日期:2012-02-01 00:00:00
abstract::Blooms of Microcystis aeruginosa (Kützing) Kützing occur frequently in many freshwater ecosystems around the world, but the role of environmental factors in promoting the growth and determining the proportion of toxic and non-toxic strains still requires more investigation. In this study, four strains (toxic CPCC299 &...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2012.01191.x
更新日期:2012-08-01 00:00:00
abstract::New miniaturized techniques for multiplying microalgae and estimating their phytohormone production were developed; in these methods, the strains to be tested are cultivated in microtitre plates, and the phytohormones in suspensions of the cultures are measured by direct ELISAs. Specific and sensitive ELISAs for deter...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00615.x
更新日期:2009-02-01 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
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01020.x
更新日期:2011-08-01 00:00:00