Journal ArticleDOI
A multi-gene molecular investigation of the kelp (Laminariales, Phaeophyceae) supports substantial taxonomic re-organization
Reads0
Chats0
TLDR
The first comprehensive and well‐supported molecular phylogeny for the ALL complex of the Laminariales is presented, maintaining the three recognized families, but with vastly different compositions, as well as proposing the Costariaceae fam.Abstract:
Every year numerous ecological, biochemical, and physiological studies are performed using members of the order Laminariales. Despite the fact that kelp are some of the most intensely studied macroalgae in the world, there is significant debate over the classification within and among the three ‘‘derived’’ families, the Alariaceae, Laminariaceae, and Lessoniaceae (ALL). Molecular phylogenies published for the ALL families have generated hypotheses strongly at odds with the current morphological taxonomy; however, conflicting phylogenetic hypotheses and consistently low levels of support realized in all of these studies have resulted in conservative approaches to taxonomic revisions. In order to resolve relationships within this group we have sequenced over 6000bp from regions in the nuclear, chloroplast, and mitochondrial genomes and included 42 taxa in Bayesian, neighbor-joining, and parsimony analyses. The result is the first comprehensive and well-supported molecular phylogeny for the ALL complex of the Laminariales. We maintain the three recognized families (Alariaceae, Laminariaceae, and Lessoniaceae), but with vastly different compositions, as well as propose the Costariaceae fam. nov. for Agarum, Costaria, Dictyoneurum, and Thalassiophyllum, the only genera in the Laminariales with flattened, occasionally terete, stipes and either a perforate or reticulate blade. In addition, our data strongly support a split of the genus Laminaria. We resurrect the genus Saccharina Stackhouse for the Laminaria clade that does not contain L. digitata (Hudson) J.V. Lamouroux, the type of the genus. Key index words: Costariaceae; Laminariales; long branch attraction; nested analyses; phylogenetics; Saccharinaread more
Citations
More filters
Journal ArticleDOI
Seaweed Extracts as Biostimulants of Plant Growth and Development
Wajahatullah Khan,Wajahatullah Khan,Usha P. Rayirath,Sowmyalakshmi Subramanian,Mundaya N. Jithesh,Prasanth Rayorath,Æ D. Mark Hodges,Alan T. Critchley,James S. Craigie,James S. Craigie,Jeff Norrie,B. Prithiviraj +11 more
TL;DR: A comprehensive review of the effect of various seaweed species and seaweed products on plant growth and development with an emphasis on the use of this renewable bioresource in sustainable agricultural systems is provided.
Journal ArticleDOI
Characterization of polysaccharides extracted from brown seaweeds
TL;DR: The structural characteristics of polysaccharides extracted from Quebec's seaweed have not been fully established to date and characterization will lead to a better understanding of their functional characteristics and promote the exploitation of this natural resource.
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
TL;DR: 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.
Journal ArticleDOI
Global ecology of the giant kelp macrocystis : from ecotypes to ecosystems
TL;DR: A global synthesis suggests that the great plasticity in Macro Cystis form and function is a key determinant of the great global ecological success of Macrocystis.
Journal ArticleDOI
A multi-locus time-calibrated phylogeny of the brown algae (Heterokonta, Ochrophyta, Phaeophyceae): Investigating the evolutionary nature of the "brown algal crown radiation".
Thomas Silberfeld,Jessica W. Leigh,Heroen Verbruggen,Corinne Cruaud,Bruno de Reviers,Florence Rousseau +5 more
TL;DR: Using Bayesian relaxed molecular clock analysis, it is shown that the BACR is likely to represent a gradual diversification spanning most of the Lower Cretaceous rather than a sudden radiation.
References
More filters
Journal ArticleDOI
Confidence limits on phylogenies: an approach using the bootstrap.
TL;DR: The recently‐developed statistical method known as the “bootstrap” can be used to place confidence intervals on phylogenies and shows significant evidence for a group if it is defined by three or more characters.
Journal ArticleDOI
MODELTEST: testing the model of DNA substitution.
David Posada,Keith A. Crandall +1 more
TL;DR: The program MODELTEST uses log likelihood scores to establish the model of DNA evolution that best fits the data.
Journal ArticleDOI
Multiple Comparisons of Log-Likelihoods with Applications to Phylogenetic Inference
TL;DR: A modification of the KH test to take into account a multiplicity of testings is presented, which shows how the test was designed for comparing two topologies but is often used for comparing many topologies.
Journal ArticleDOI
Cases in which Parsimony or Compatibility Methods will be Positively Misleading
TL;DR: Parsimony or minimum evolution methods were first introduced into phylogenetic inference by Camin and Sokal (1965), and a number of other parsimony methods have since appeared in the systematic literature and found widespread use in studies of molecular evolution.