Results 21 to 30 of about 3,861 (176)

Physiological changes during torpor favor association with Endozoicomonas endosymbionts in the urochordate Botrylloides leachii

open access: yesFrontiers in Microbiology, 2023
Environmental perturbations evoke down-regulation of metabolism in some multicellular organisms, leading to dormancy, or torpor. Colonies of the urochordate Botrylloides leachii enter torpor in response to changes in seawater temperature and may survive ...
Yosef Hyams   +7 more
doaj   +1 more source

Immunobiology of compound ascidians, with particular reference to Botryllus schlosseri: state of art [PDF]

open access: yesInvertebrate Survival Journal, 2008
The phylogenetic position of invertebrate chordates closely related to vertebrates explains the increasing interest towards tunicate immunobiology. Most of the tunicates are ascidians which, like all other invertebrates, rely only on innate immunity for ...
L Ballarin
doaj   +2 more sources

Fertilization of Ascidians: Gamete Interaction, Self/Nonself Recognition and Sperm Penetration of Egg Coat

open access: yesFrontiers in Cell and Developmental Biology, 2022
Fertilization is one of the most important events in living organisms to generate a new life with a mixed genetic background. To achieve successful fertilization, sperm and eggs must undergo complex processes in a sequential order.
Takako Saito   +2 more
doaj   +1 more source

Mechanisms of Sperm–Egg Interactions: What Ascidian Fertilization Research Has Taught Us

open access: yesCells, 2022
Fertilization is an essential process in terrestrial organisms for creating a new organism with genetic diversity. Before gamete fusion, several steps are required to achieve successful fertilization.
Hitoshi Sawada, Takako Saito
doaj   +1 more source

Seasonal variation in Azumiobodo hoyamushi infection among benthic organisms in the southern coast of Korea

open access: yesParasites & Vectors, 2015
Background Recent studies have reported that soft tunic syndrome (STS) in the edible ascidian Halocynthia roretzi is caused by the kinetoplastid parasite Azumiobodo hoyamushi.
Ki-Woong Nam   +2 more
doaj   +1 more source

Possible Evolutionary Precursors of Mast Cells: The ‘Granular Cell’ Immunocyte of Botrylloides leachii (Tunicata; Ascidiacea)

open access: yesJournal of Marine Science and Engineering
Vertebrate mast cells are the first cells to initiate the inflammatory response. The origin of these highly specialised innate immunity cells in chordates is an intriguing unanswered question, and tunicates represent the best candidates to address this ...
Nicolò Brunelli   +2 more
doaj   +1 more source

Antitumor potential of natural products from marine ascidians of the Gibraltar Strait: A survey

open access: yesCiencias Marinas, 2003
The chemical study of a selection of marine ascidians from the Gibraltar Strait has led to the characterization of a collection of natural products of diverse biosynthetic origin.
E Zubía, MJ Ortega, J Salvá
doaj   +1 more source

Secondary contacts and genetic admixture shape colonization by an amphiatlantic epibenthic invertebrate

open access: yesEvolutionary Applications, 2020
Research on the genetics of invasive species often focuses on patterns of genetic diversity and population structure within the introduced range. However, a growing body of literature is demonstrating the need to study how native genotypes affect both ...
Jamie Hudson   +3 more
doaj   +1 more source

Conservation of peripheral nervous system formation mechanisms in divergent ascidian embryos

open access: yeseLife, 2020
Ascidians with very similar embryos but highly divergent genomes are thought to have undergone extensive developmental system drift. We compared, in four species (Ciona and Phallusia for Phlebobranchia, Molgula and Halocynthia for Stolidobranchia), gene ...
Joshua F Coulcher   +8 more
doaj   +1 more source

Embryonic development of the Mediterranean starfish Hacelia attenuata

open access: yesDevelopmental Dynamics, EarlyView.
Abstract Background Starfish play essential ecological roles as predators and ecosystem regulators; however, detailed developmental descriptions exist for only a handful of species, none of which are from the Mediterranean Sea. Results In this study, we provide the first full account of the development of the Mediterranean starfish Hacelia attenuata ...
Silvia Caballero‐Mancebo   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy