TWO NEW VARIETIES OF STAURASTRUM (DESMIDIACEAE) FROM SÃO PAULO, BRAZIL.

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

authors： McDowell RE,Amsler MO,Li Q,Lancaster JR Jr,Amsler CD

更新日期：2015-06-01 00:00:00

abstract：:Alexandrium ostenfeldii (Paulsen) Balech and Tangen and A. peruvianum (Balech and B.R. Mendiola) Balech and Tangen are morphologically closely related dinoflagellates known to produce potent neurotoxins. Together with Gonyaulax dimorpha Biecheler, they constitute the A. ostenfeldii species complex. Due to the subtle d...

journal_title：Journal of phycology

authors： Kremp A,Tahvanainen P,Litaker W,Krock B,Suikkanen S,Leaw CP,Tomas C

更新日期：2014-02-01 00:00:00

abstract：:Astaxanthin-rich oil globules in Haematococcus pluvialis display rapid light-induced peripheral migration that is unique to this organism and serves to protect the photosynthetic system from excessive light. We observed rapid light-induced peripheral migration that is associated with chlorophyll fluorescence quenching...

journal_title：Journal of phycology

authors： Peled E,Pick U,Zarka A,Shimoni E,Leu S,Boussiba S

更新日期：2012-10-01 00:00:00

abstract：:Porphyra haitanensis (T. J. Chang & B. F. Zheng) is an important economic alga found off the southern coast of China. It has evolved a strong tolerance against stress, which is an important survival characteristic. Cyclophilin has been shown to be involved in the stress response of plants and algae. To investigate the...

journal_title：Journal of phycology

authors： Jia Z,Niu J,Huan L,Wu X,Wang G,Hou Z

更新日期：2013-02-01 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

authors： Martínez B,Rico JM

更新日期：2008-02-01 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

authors： Bruggeman J

更新日期：2011-02-01 00:00:00

abstract：:Currently, very few studies address the relationship between diversity and biomass/lipid production in primary producer communities for biofuel production. Basic studies on the growth of microalgal communities, however, provide evidence of a positive relationship between diversity and biomass production. Recent studie...

journal_title：Journal of phycology

authors： Stockenreiter M,Haupt F,Graber AK,Seppälä J,Spilling K,Tamminen T,Stibor H

更新日期：2013-10-01 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：: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：: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

authors： Deblois CP,Juneau P

更新日期：2012-08-01 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

authors： Desmond MJ,Pajusalu L,Pritchard DW,Stephens TA,Hepburn CD

更新日期：2019-08-01 00:00:00

abstract：:As part of a long-term study on the biology and ecology of the intertidal kelp Lessonia nigrescens Bory, we report on the occurrence of gall development on this alga, identified the possible causal agent, and assessed the extent of the phenomenon in two wild stands of the host. Our results showed that galls affecting ...

journal_title：Journal of phycology

authors： Thomas D,Beltrán J,Flores V,Contreras L,Bollmann E,Correa JA

更新日期：2009-12-01 00:00:00

abstract：:Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could b...

journal_title：Journal of phycology

authors： López BA,Macaya EC,Tala F,Tellier F,Thiel M

更新日期：2017-02-01 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：: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

authors： Majewska R,Taylor JC,Goosen WE

更新日期：2020-12-19 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

authors： Chapman DJ,Haxo FT

更新日期：1966-06-01 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：:Brevetoxin (PbTx) is a neurotoxic secondary metabolite of the dinoflagellate Karenia brevis. We used a novel, fluorescent BODIPY-labeled conjugate of brevetoxin congener PbTx-2 (B-PbTx) to track absorption of the metabolite into a variety of marine microbes. The labeled toxin was taken up and brightly fluoresced in li...

journal_title：Journal of phycology

authors： J Kramer B,J Bourdelais A,Kitchen SA,Taylor AR

更新日期：2019-02-01 00:00:00

abstract：:Menadione, a quinone that undergoes redox cycles leading to the formation of superoxide radicals, induces programmed cell death (PCD) in animals and plants. In this study, we investigated whether the unicellular green alga Chlamydomonas reinhardtii P.A.Dangeard is capable of executing PCD upon exposure to menadione st...

journal_title：Journal of phycology

authors： Sirisha VL,Sinha M,D'Souza JS

更新日期：2014-06-01 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

authors： Littler MM,Littler DS

更新日期：2012-02-01 00:00:00

abstract：:The dinophysoid dinoflagellates are currently divided into three families: Amphisoleniaceae, Dinophysaceae (mainly Dinophysis Ehrenb. and Phalacroma F. Stein), and Oxyphysaceae, the latter including only one member, Oxyphysis oxytoxoides Kof. Phalacroma has been recently reinstated separately from Dinophysis, and its ...

journal_title：Journal of phycology

authors： Gómez F,López-García P,Moreira D

更新日期：2011-04-01 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

authors： Carignan MO,Carreto JI

更新日期：2013-08-01 00:00:00

abstract：:The plastidic glyceraldehyde-3-phosphate dehydrogenase (GAPDH) catalyzes the only reductive step in the Calvin cycle and exists as different forms of which GapC1 enzyme is present in chromalveolates, such as diatoms. Biochemical studies on diatoms are still fragmentary, and, thus, in this report, GAPDH from the freshw...

journal_title：Journal of phycology

authors： Erales J,Gontero B,Maberly SC

更新日期：2008-12-01 00:00:00

abstract：:Studies of quantitative trait loci based on genetic linkage maps require the establishment of a mapping population. Permanent mapping populations are more ideal than temporary ones because they can be used repeatedly. However, there has been no reported permanent sporophyte population of economically important kelp sp...

journal_title：Journal of phycology

authors： Shan T,Pang S,Wang X,Li J,Li Q,Su L,Li X

更新日期：2020-09-04 00:00:00

abstract：:The marine dinoflagellate, Glenoclinium foliaceum Stein, has been shown to contain fucoxanthin, instead of peridinin, as the major xanthophyll. In addition, 2 carotenes-β-carotene and a compound with spectral properties reminiscent of isomerized y-carotene-and 2 xanthophylls-diadinoxanthin and an unidentified compound...

journal_title：Journal of phycology

authors： Mandelli EF

更新日期：1968-12-01 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

authors： Kawai H,Hanyuda T,Lindeberg M,Lindstrom SC

更新日期：2008-08-01 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：: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：:Galactose-1-phosphate uridylyltransferase (GALT) catalyzes the reversible conversion of glucose-1-phosphate and UDP-galactose to galactose-1-phosphate and UDP-glucose. This enzyme is also responsible for one of the biochemical steps that produce the precursors of agar and agarose. In this study, we report the molecula...

journal_title：Journal of phycology

authors： Siow RS,Teo SS,Ho WY,Shukor MY,Phang SM,Ho CL

更新日期：2012-02-01 00:00:00

abstract：:Xanthophyll cycle-related nonphotochemical quenching (NPQ), which is present in most photoautotrophs, allows dissipation of excess light energy. Xanthophyll cycle-related NPQ depends principally on xanthophyll cycle pigments composition and their effective involvement in NPQ. Xanthophyll cycle-related NPQ is tightly c...

journal_title：Journal of phycology

authors： Lacour T,Babin M,Lavaud J

更新日期：2020-04-01 00:00:00