Journal ArticleDOI
The genus Laminaria sensu lato : recent insights and developments
Inka Bartsch,Christian Wiencke,Kai Bischof,Cornelia Buchholz,Bela H. Buck,Anja Eggert,Peter Feuerpfeil,Dieter Hanelt,Sabine Jacobsen,Rolf Karez,Ulf Karsten,Markus Molis,Michael Y. Roleda,Hendrik Schubert,Rhena Schumann,Klaus Valentin,Florian Weinberger,Jutta Wiese +17 more
TLDR
This review about the genus Laminaria sensu lato summarizes the extensive literature that has been published since the overview of the genus given by Kain in 1979, and covers recent insights into phylogeny and taxonomy, and discusses morphotypes, ecotypes, population genetics and demography.Abstract:
This review about the genus Laminaria sensu lato summarizes the extensive literature that has been published since the overview of the genus given by Kain in 1979. The recent proposal to divide the genus into the two genera Laminaria and Saccharina is acknowledged, but the published data are discussed under a 'sensu lato' concept, introduced here. This includes all species which have been considered to be 'Laminaria' before the division of the genus. In detail, after an introduction the review covers recent insights into phylogeny and taxonomy, and discusses morphotypes, ecotypes, population genetics and demography. It describes growth and photosynthetic performance of sporophytes with special paragraphs on the regulation of sporogenesis, regulation by endogenous rhythms, nutrient metabolism, storage products, and salinity tolerance. The biology of microstages is discussed separately. The ecology of these kelps is described with a focus on stress defence against abiotic and biotic factors and the role of Laminaria as habitat, its trophic interactions and its competition is discussed. Finally, recent developments in aquaculture are summarized. In conclusion to each section, as a perspective and guide to future research, we draw attention to the remaining gaps in the knowledge about the genus and kelps in general.read more
Citations
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Bioactive compounds in seaweed: functional food applications and legislation
Susan Løvstad Holdt,Stefan Kraan +1 more
TL;DR: Worldwide research on bioactive compounds in seaweed is reviewed, mainly of nine genera or species of seaweed, which are also available in European temperate Atlantic waters, i.e. Laminaria sp.
Journal ArticleDOI
The cell wall polysaccharide metabolism of the brown alga Ectocarpus siliculosus. Insights into the evolution of extracellular matrix polysaccharides in Eukaryotes.
TL;DR: Surprisingly, known families of cellulases, expansins and alginate lyases are absent in Ectocarpus, suggesting the existence of novel mechanisms and/or proteins for cell wall expansion in brown algae.
Journal ArticleDOI
Iodide accumulation provides kelp with an inorganic antioxidant impacting atmospheric chemistry.
Frithjof C. Küpper,Lucy J. Carpenter,Gordon McFiggans,Carl J. Palmer,Tim J. Waite,Eva-Maria Boneberg,Sonja Woitsch,Markus Weiller,Rafael Abela,Daniel Grolimund,Philippe Potin,Alison Butler,George W. Luther,Peter M. H. Kroneck,Wolfram Meyer-Klaucke,Martin C. Feiters +15 more
TL;DR: Using x-ray absorption spectroscopy, it is shown that the accumulated form is iodide, which readily scavenges a variety of reactive oxygen species (ROS) and is the first to be described in a living system.
Journal ArticleDOI
The role of kelp species as biogenic habitat formers in coastal marine ecosystems
Harry Teagle,Stephen J. Hawkins,Stephen J. Hawkins,Philippa Moore,Philippa Moore,Dan A. Smale,Dan A. Smale +6 more
TL;DR: Biodiversity patterns associated with kelp holdfasts, stipes and blades are examined, as well as the wider understorey habitat, and generality between kelp species and biogeographic regions are searched for.
Journal ArticleDOI
Mass-cultivation of carbohydrate rich macroalgae, a possible solution for sustainable biofuel production
TL;DR: In this paper, the authors examined the current cultivation technologies for marine biomass and the environmental and economic aspects of using brown seaweeds for bio-ethanol production, and concluded that marine biomass could meet these challenges, being an abundant and carbon neutral renewable resource with potential to reduce green house gas (GHG) emissions and the manmade impact on climate change.
References
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Journal ArticleDOI
Rapid phlorotannin induction and relaxation in five Washington kelps
TL;DR: The rapid response of kelps to mechanical wounding contrasts with previously published work on other marine algae, where response has been slower, and the temporal persistence of the response suggests an antiherb~vory rather than a wound-healing function for induction of phlorotannins, although this needs further testing.
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Sensitivity of Laminariales zoospores from Helgoland (North Sea) to ultraviolet and photosynthetically active radiation: implications for depth distribution and seasonal reproduction
TL;DR: This study indicates that UVR sensitivity of zoospores is related to the seasonal zoospore production as well as the vertical distribution pattern of the large sporophytes.
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Brown algae species as biomonitors of Zn and Cd at Sepetiba Bay, Rio de Janeiro, Brazil
TL;DR: Long term evaluation of Zn and Cd concentration was performed in two brown algae species, Padina gymnospora and Sargassum stenophyllum, finding that the species could reflect the variation in metal environment availability.
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Laminaria saccharina photosynthesis measured in situ: photoinhibition and xanthophyll cycle during a tidal cycle
François Gevaert,Anne Créach,Dominique Davoult,Aline Migné,Guy Levavasseur,Pierre Arzel,Anne-Catherine Holl,Yves Lemoine +7 more
TL;DR: Algae totally recovered during the rising tide, indicating that no significant photosynthetic damage occurred at ebb tide, and indicates that primary production levels have been overestimated in the past.
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Ecotypic differentiation of Laminaria longicruris in relation to seawater nitrate concentration
J. Espinoza,A. R. O. Chapman +1 more
TL;DR: Genetic differentiation of Laminaria longicruris populations has been demonstrated in nitrate-poor (St. Margaret's Bay) and nitrates rich (Bay of Fundy) regions of Nova Scotia, Canada, thought to be adaptive responses to the local nitrate environments.