Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Amphioxus"”.
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Ancient origins of the chordate forebrain: Conserved patterning of the anterior neuroectoderm in amphioxus
… across deuterostomes using the cephalochordate amphioxus as the main model organism. I first show that during amphioxus development aGRN genes are expressed in a similar pattern to the one found in echinoderms and hemichordates, are regulated by Wnt/b-catenin signalling and are active in the …
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How to build a chordate: Multiscale decomposition of axial morphogenesis in the amphioxus, Branchiostoma lanceolatum
… of the chordate phylum – the cephalochordate, amphioxus. In this PhD thesis, I present a decomposition of body plan morphogenesis in the amphioxus embryo at three primary scales of observation. First, I identify the major changes in tissue shape and cellular architecture involved in body plan …
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Establishing Image-Based Profiling Methods for Single-Cell Transcriptomics and Morphometrics in the Cephalochordate Amphioxus
The cephalochordate amphioxus occupies a key phylogenetic position for comparative studies elucidating the origins of the chordate body plan and the emergence of vertebrate novelties during evolution. However, as a model system, the amphioxus is still challenging to culture in the lab, and …
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Study of the Evolutionary Role of Nitric Oxide (NO) in the Cephalochordate Amphioxus, “<i>Branchiostoma lanceolatum</i>”
… <i>Branchiostoma lanceolatum</i> (amphioxus) with the purpose of acquiring further knowledge on the ancestral role of animal <i>Nos</i> and the acquisition of new NO functions during evolution. Amphioxus has three different <i>Nos</i> genes (<i>NosA, NosB</i> and <i>NosC</i>) that …
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A Multimedia Atlas of Dissection for Comparative Anatomy of the Vertebrates
… representative members of the Phylum Chordata: amphioxus, lamprey, dogfish shark, mud puppy, and cat. Specimens were dissected according to the modified method of Wischnitzer, 1993, and each stage was photographed with a Kodak DC120 digital zoom camera. These images were processed on a Power …
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Cross-species single-cell transcriptomics and its applications in evolutionary and translational research
… molecular signature present in the sea urchin, amphioxus and zebrafish embryo and offers a template for future studies to compare vertebrate and invertebrate nervous systems with single-cell approaches.
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Evolutionary and Developmental Survey of Genes Involved in Chordate Pigmentation
… pattern in key species as zebrafish and amphioxus, demonstrating how events as whole-genome duplications have influenced their role during embryogenesis. <br></br><br></br> In order to find new genes involved in pigmentation, I analyzed a Kelch-like member in ascidian <i>Ciona robusta</i> …
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Function and Regulation of the Conserved Wnt Target sp5 in the Vertebrate Nervous System
… humans, Xenopus, Mouse, zebrafish, Hydra and amphioxus. Despite the evidence of its involvement in Wnt mediated processes in several species, its regulation and exact function during Wnt mediated nervous system patterning is not well studied. Here we show that during neural patterning, …