Abstract:
:Maintaining buoyancy with gas-filled floats (pneumatocysts) is essential for some subtidal kelps to achieve an upright stature and compete for light . However, as these kelps grow up through the water column, pneumatocysts are exposed to substantial changes in hydrostatic pressure, which could cause complications as internal gases may expand or contract, potentially causing them to rupture, flood, and lose buoyancy. In this study, we investigate how pneumatocysts of Nereocystis luetkeana resist biomechanical stress and maintain buoyancy as they develop across a hydrostatic gradient. We measured internal pressure, material properties, and pneumatocyst geometry across a range of thallus sizes and collection depths to identify strategies used to resist pressure-induced mechanical failure. Contrary to expectations, all pneumatocysts had internal pressures less than atmospheric pressure, ensuring that thalli are always exposed to a positive pressure gradient and compressional loads, indicating that they are more likely to buckle than rupture at all depths. Small pneumatocysts collected from depths between 1 and 9 m (inner radius = 0.4-1.0 cm) were demonstrated to have elevated wall stresses under high compressive loads and are at greatest risk of buckling. Although small kelps do not adjust pneumatocyst material properties or geometry to reduce wall stress as they grow, they are ~3.4 times stronger than they need to be to resist hydrostatic buckling. When tested, pneumatocysts buckled around 35 m depth, which agrees with previous measures of lower limits due to light attenuation, suggesting that hydrostatic pressure may also define the lower limit of Nereocystis in the field.
journal_name
J Phycoljournal_title
Journal of phycologyauthors
Liggan LM,Martone PTdoi
10.1111/jpy.12776subject
Has Abstractpub_date
2018-10-01 00:00:00pages
608-615issue
5eissn
0022-3646issn
1529-8817journal_volume
54pub_type
杂志文章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 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::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::Fourier transform infrared (FTIR) spectrometry was used to study the spectral features of 12 eukaryotic and two prokaryotic species of microalgae. The algae were cultured in liquid media containing either NO3 (-) or NH4 (+) as the sole N-source; for the NH4 (+) treatment, the algae were subjected to short-term (24 h) ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2009.00662.x
更新日期:2009-04-01 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
pub_type: 杂志文章
doi:10.1111/jpy.13122
更新日期:2020-12-19 00:00:00
abstract::The eukaryotic green microalga Tetraselmis suecica is commonly used for aquaculture purposes because of its high stress tolerance and ease of culture in a wide spectrum of environments; they are therefore suitable candidates for biotechnology applications. To date, no data are available regarding chloroplast transform...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.13013
更新日期:2020-08-01 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::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::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
pub_type: 杂志文章
doi:10.1111/jpy.12907
更新日期:2019-10-01 00:00:00
abstract::Following exposure to long-wavelength ultraviolet radiation (UVA), some cyanobacteria produce the indole-alkaloid sunscreen scytonemin. The genomic region associated with scytonemin biosynthesis in the cyanobacterium Nostoc punctiforme includes 18 cotranscribed genes. A two-component regulatory system (Npun_F1277/Npun...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12414
更新日期:2016-08-01 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::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
pub_type: 杂志文章
doi:10.1111/jpy.12229
更新日期:2014-10-01 00:00:00
abstract::The gametes of chlorophytes can be divided into two morphological types (types α and β) based on the position of the mating structure relative to the flagella and eyespot. To elucidate the relationship between the morphological types and the sexes, we studied spatial relationships between the flagellar apparatus-eyesp...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.13096
更新日期:2020-11-04 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::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::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::Sequences of the gene encoding the large subunit of RUBISCO (rbcL) for 30 genera in the six currently recognized families of conjugating green algae (Desmidiaceae, Gonatozygaceae, Mesotaeniaceae, Peniaceae, and Zygnemataceae) were analyzed using maximum parsimony and maximum likelihood; bootstrap replications were per...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1046/j.1529-8817.2000.99106.x
更新日期:2000-08-26 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::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
abstract::Despite worldwide proliferation of the genus Caulerpa and subsequent effects on benthic communities, little is known about the nutritional physiology of the Caulerpales. Here, we investigated the uptake rates of ammonium, nitrate, amino acids, and phosphate through the fronds and rhizoids + stolon, the internal transl...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12988
更新日期:2020-06-01 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::We studied cupric glutamate as a novel algicide for marine harmful algae and hexadecyltrimethyleamine bromide (HDTMAB) as an accelerant. Cupric glutamate had an excellent ability to inhibit the growth of Alexandrium sp. LC3, but the inhibition efficiency did not increase with higher cupric glutamate concentration. The...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00591.x
更新日期:2008-12-01 00:00:00
abstract::Gracilariaceae are mostly pantropical red algae and include ~230 species in seven genera. Infrafamilial classification of the group has long been based on reproductive characters, but previous phylogenies have shown that traditionally circumscribed groups are not monophyletic. We performed phylogenetic analyses using ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12281
更新日期:2015-04-01 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::We studied group I introns in sterile cultures of selected groups of lichen photobionts, focusing on Trebouxia species associated with Xanthoria s. lat. (including Xanthomendoza spp.; lichen-forming ascomycetes). Group I introns were found inserted after position 798 (Escherichia coli numbering) in the large subunit (...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12126
更新日期:2013-12-01 00:00:00
abstract::Sargassum muticum (Yendo) Fensholt is an invasive species that is firmly established on intertidal and subtidal rocky shores of Europe and the Pacific coast of North America. Local success and spread of S. muticum is thought to rely on its reproductive potential that seems dependent on exogenous factors like tidal and...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00619.x
更新日期:2009-02-01 00:00:00
abstract::Members of the morphologically unusual cyanobacterial family Gomontiellaceae were studied using a polyphasic approach. Cultured strains of Hormoscilla pringsheimii, Starria zimbabweënsis, Crinalium magnum, and Crinalium epipsammum were thoroughly examined, and the type specimen of the family, Gomontiella subtubulosa, ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12354
更新日期:2015-12-01 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
pub_type: 杂志文章
doi:10.1111/jpy.12787
更新日期:2019-02-01 00:00:00
abstract::Phospholipase D (PLD) participates in the formation of phosphatidic acid, a precursor in glycerolipid biosynthesis and a second messenger. PLDs are part of a superfamily of proteins that hydrolyze phosphodiesters and share a catalytic motif, HxKxxxxD, and hence a mechanism of action. Although HKD-PLDs have been thorou...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12334
更新日期:2015-10-01 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