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, whereas the recovery was slow. A simple assay to follow globule migration, based on chlorophyll fluorescence level has been developed. Globule migration was induced by high intensity blue light, but not by high intensity red light. The electron transport inhibitor dichlorophenyl-dimethylurea did not inhibit globule migration, whereas the quinone analog (dibromo-methyl-isopropylbenzoquinone), induced globule migration even at low light. Actin microfilament-directed toxins, such as cytochalasin B and latrunculin A, inhibited the light-induced globule migration, whereas toxins against microtubules were ineffective. Electron microscopic (EM) imaging confirmed the cytoplasmic localization and peripheral migration of globules upon exposure to very high light (VHL). Scanning EM of freeze-fractured cells also revealed globules within cytoplasmic bridges traversing the chloroplast, presumably representing the pathway of migration. Close alignments of globules with endoplasmic reticulum (ER) membranes were also observed following VHL illumination. We propose that light-induced globule migration is regulated by the redox state of the photosynthetic electron transport system. Possible mechanisms of actin-based globule migration are discussed.
journal_name
J Phycoljournal_title
Journal of phycologyauthors
Peled E,Pick U,Zarka A,Shimoni E,Leu S,Boussiba Sdoi
10.1111/j.1529-8817.2012.01210.xsubject
Has Abstractpub_date
2012-10-01 00:00:00pages
1209-19issue
5eissn
0022-3646issn
1529-8817journal_volume
48pub_type
杂志文章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::Large-scale environmental disturbances may impact both partners in coral host-Symbiodinium systems. Elucidation of the assembly patterns in such complex and interdependent communities may enable better prediction of environmental impacts across coral reef ecosystems. In this study, we investigated how the community co...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12749
更新日期:2018-08-01 00:00:00
abstract::An adverse consequence of applying morphology-based taxonomic systems to catalog cyanobacteria, which generally are limited in the number of available morphological characters, is a fundamental underestimation of natural biodiversity. In this study, we further dissect the polyphyletic cyanobacterial genus Lyngbya and ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12115
更新日期:2013-12-01 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::The photoprotective response in the dinoflagellate Glenodinium foliaceum F. Stein exposed to ultraviolet-A (UVA) radiation (320-400 nm; 1.7 W · m(2) ) and the effect of nitrate and phosphate availability on that response have been studied. Parameters measured over a 14 d growth period in control (PAR) and experimental...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01046.x
更新日期:2011-10-01 00:00:00
abstract::The North Sea-Baltic Sea transition zone constitutes a boundary area for the kelp species Saccharina latissima due to a strong salinity gradient operating in the area. Furthermore, the existence of S. latissima there, along Danish waters, is fairly patchy as hard bottom is scarce. In this study, patterns of genetic di...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12428
更新日期:2016-08-01 00:00:00
abstract::The broadly defined genus Chaetophora consisted of species with minute, uniseriate branching filaments enveloped in soft or firm mucilage forming macroscopic growths that are spherical, hemispherical, and tubercular or arbuscular, growing epiphytically on freshwater aquatic plants and other submerged surfaces in stand...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12803
更新日期:2019-02-01 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
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00549.x
更新日期:2008-08-01 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::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
pub_type: 信件
doi:10.1111/jpy.12041
更新日期:2013-04-01 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::A multi-gene (SSU, LSU, psbA, and COI) molecular phylogeny of the family Corallinaceae (excluding the subfamilies Lithophylloideae and Corallinoideae) showed a paraphyletic grouping of six monophyletic clades. Pneophyllum and Spongites were reassessed and recircumscribed using DNA sequence data integrated with morpho-...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12644
更新日期:2018-06-01 00:00:00
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 condition...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2012.01154.x
更新日期:2012-06-01 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
pub_type: 杂志文章
doi:10.1111/jpy.12134
更新日期:2014-02-01 00:00:00
abstract::Pyropia yezoensis (Ueda) M. S. Hwang et H. G. Choi (previously called Porphyra yezoensis) is an economically important alga. The blades generated from conchospores are genetic chimeras, which are not suitable for genetic similarity analysis. In this study, two types of blades from a single filament of P. yezoensis spo...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12058
更新日期:2013-06-01 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
pub_type: 杂志文章
doi:10.1111/jpy.12257
更新日期:2015-02-01 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::Ceratium furcoides is an invasive freshwater dinoflagellate that in the last three decades has expanded its geographic distribution in South America, being recently found in Paraná River floodplain (Argentina). Despite growing concern about the presence and impacts of this invader, information regarding genetic divers...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.13015
更新日期:2020-10-01 00:00:00
abstract::The establishment of epitypes (together with the emended diagnoses) for three species of Euglenaria Karnkowska, E. W. Linton et Kwiatowski [Eu. anabaena (Mainx) Karnkowska et E. W. Linton; Eu. caudata (Hübner) Karnkowska et E. W. Linton; and Eu. clavata (Skuja) Karnkowska et E. W. Linton] and two species of Euglena Eh...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2012.01140.x
更新日期:2012-06-01 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
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2012.01219.x
更新日期:2012-12-01 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::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
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00600.x
更新日期:2008-12-01 00:00:00
abstract::Phytoplankton forms the basis of primary production in mangrove environments. The phylogeny and diversity based on the amplification and sequencing of rbcL, the large subunit encoding the key enzyme ribulose-1, 5-bisphosphate carboxylase/oxygenase was investigated for improved understanding of the community structure ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12163
更新日期:2014-04-01 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::Twenty years ago an Arctic cryptophyte was isolated from Baffin Bay and given strain number CCMP2045. Here, it was described using morphology, water- and non-water soluble pigments and nuclear-encoded SSU rDNA. The influence of temperature, salinity, and light intensity on growth rates was also examined. Microscopy re...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12766
更新日期:2018-10-01 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::A metabolite screening of cyanobacteria was performed by nuclear magnetic resonance (NMR) analysis of the soluble material obtained through sequential extraction of the biomass with three different extractive ability solvents (hexane, ethyl acetate, and methanol). Twenty-five strains from the Coimbra Collection of Alg...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12959
更新日期:2020-04-01 00:00:00
abstract::The family Microchaetaceae is a large group of heterocytous cyanobacteria, whose members bear typical morphological features of uniseriate heteropolar filaments never terminated by thin hairs and with simple false branching. However, phylogenetic analyses of the gene for 16S rRNA showed that members of this traditiona...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12241
更新日期:2014-12-01 00:00:00
abstract::Although hypotheses have been proposed and developed to interpret the origins and functions of introns, substantial controversies remain about the mechanism of intron evolution. The availability of introns in the intermediate state is quite helpful for resolving this debate. In this study, a new strain of diatom (deno...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12605
更新日期:2018-02-01 00:00:00