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Hydra – Emerging Model System. Phylogeny Abraham Trembley (1744) Mémoires pour servir à l'histoire d'un genre de polypes d'eau douce, Gebr. Verbeek,

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Presentation on theme: "Hydra – Emerging Model System. Phylogeny Abraham Trembley (1744) Mémoires pour servir à l'histoire d'un genre de polypes d'eau douce, Gebr. Verbeek,"— Presentation transcript:

1 Hydra – Emerging Model System

2 Phylogeny

3 Abraham Trembley (1744) Mémoires pour servir à l'histoire d'un genre de polypes d'eau douce, Gebr. Verbeek, Leiden History

4 Scale bar = 2.5 mm Phylum: Cnidaria Class: Hydrozoa Family: Hydridae Genus: Hydra Hydra vulgaris Ind-Pune

5 General Morphology of Hydra

6 Stem Cells

7 Types of Nematocysts Scale bar = 5μm

8 Asexual Reproduction by Budding Scale bar = 0.1mm

9 Regeneration Capacity of Hydra Longitudinal cut Trisection Traverse cut

10 Tissue Dynamics

11 Genome 2n=30 Genome Size ~1.3 G bp Genome Assemblies –H.magnipapillata, H.vulgaris Ind-Pune (Adapted from Anokhin et.al., 2010)

12 Phylogeny (At the base of metazoan phyla) Evolutionary transition (body axis, germ layers, gonads, cell types) Pattern formation (peculiar tissue dynamics make hydra a perpetual embryo) Regeneration, stem cells What we can learn from Hydra


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