Phylogeny and biogeography of Hydra (Cnidaria: Hydridae) using mitochondrial and nuclear DNA sequences

Martínez, Daniel E.; Iñiguez, Abril R.; Percell, K.M.; Willner, J.B.; Signorovitch, J.; Campbell, Richard D.

doi:10.1016/j.ympev.2010.06.016

Cited by 98 publications

(117 citation statements)

References 30 publications

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“…In the late 1990s Campbell and Martinez started to collect Hydra in various parts of the world to perform phylogenetic analyses (Martinez et al, 2010). A similar phylogenetic analysis was also performed by the Japanese school (Kawaida et al, 2010) and both studies provided a similar picture of the distribution of the Hydra strains in four major species.…”

Section: Current Status Of Hydra Strains At the National Institute Ofmentioning

confidence: 96%

Transplantation analysis of developmental mechanisms in Hydra

Shimizu¹

2012

Int. J. Dev. Biol.

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To this end, they collected in several areas of Japan multiple Hydra strains that they subsequently characterized and crossed. They also established a lateral transplantation strategy that was much more powerful than the previous ones, as it combined quantitative measurements with cellular analyses thanks to the chimera procedures developed by Campbell and colleagues. Indeed this approach provided a paradigm to quantify in any morphological phenotype the Head Activation and Head Inhibition levels along the body column. In this article, I review the various strains identified by Sugiyama and colleagues, the principles and the main results deduced from the quantitative lateral transplantation strategy. In addition, I briefly discuss the relevance of this approach in the era of molecular biology.

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Section: Current Status Of Hydra Strains At the National Institute Ofmentioning

confidence: 96%

Transplantation analysis of developmental mechanisms in Hydra

Shimizu¹

2012

Int. J. Dev. Biol.

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“…Despite numerous studies on Hydra spanning as disparate fields as immunology (Bosch et al, 2009), stem cell biology (David, 2012;Hobmayer et al, 2012;Nishimiya-Fujisawa and Kobayashi, 2012) and evolutionary biology (Hemmrich et al, 2007;Kawaida et al, 2010;Martínez et al, 2010), as well as a complete sequenced Hydra genome (Chapman et al, 2010), and two sequenced mitochondrial genomes for Hydra (Kayal and Lavrov, 2008;Voigt et al, 2008), little is known about the precise phylogenetic placement of Hydra or the relationships among major lineages of Aplanulata. Recent studies have begun to shed light on these relationships, particularly within the families Hydridae , Tubulariidae (Marques and Migotto, 2001) and Corymorphidae Nawrocki and Cartwright, 2012).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic placement of Hydra and relationships within Aplanulata (Cnidaria: Hydrozoa)

Nawrocki

Collins

Hirano

et al. 2013

Molecular Phylogenetics and Evolution

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“…However, endosymbiosis is not restricted to stony corals in cnidarians, it is also present in some sea anemones, jellyfish and Hydra species (see in Venn et al, 2008). Out of the four Hydra species (Kawaida et al, 2010;Martinez et al, 2010), only Hydra viridissima shows endosymbiosis with photosynthetic Chlorella algae living in the endodermal epithelial cells, and transmitted to the oocyte when the animals undergo sexual differentiation (Muscatine and Lenhoff, 1963;Rahat and Reich, 1985). More than 100 years ago Whitney found a way to eliminate these algae without compromising the survival of their host, which then become aposymbiotic (Whitney, 1907).…”

Section: Ecotoxicology and Environmentmentioning

confidence: 99%

Hydra, a fruitful model system for 270 years

Galliot¹

2012

Int. J. Dev. Biol.

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The discovery of Hydra regeneration by Abraham Trembley in 1744 promoted much scientific curiosity thanks to his clever design of experimental strategies away from the natural environment. Since then, this little freshwater cnidarian polyp flourished as a potent and fruitful model system. Here, we review some general biological questions that benefitted from Hydra research, such as the nature of embryogenesis, neurogenesis, induction by organizers, sex reversal, symbiosis, aging, feeding behavior, light regulation, multipotency of somatic stem cells, temperature-induced cell death, neuronal transdifferentiation, to cite only a few. To understand how phenotypes arise, theoricists also chose Hydra to model patterning and morphogenetic events, providing helpful concepts such as reaction-diffusion, positional information, and autocatalysis combined with lateral inhibition. Indeed, throughout these past 270 years, scientists used transplantation and grafting experiments, together with tissue, cell and molecular labelings, as well as biochemical procedures, in order to establish the solid foundations of cell and developmental biology. Nowadays, thanks to transgenic, genomic and proteomic tools, Hydra remains a promising model for these fields, but also for addressing novel questions such as evolutionary mechanisms, maintenance of dynamic homeostasis, regulation of stemness, functions of autophagy, cell death, stress response, innate immunity, bioactive compounds in ecosystems, ecotoxicant sensing and science communication. KEY WORDS: historical perspective, transplantation, modeling, developmental reactivation, Hydra regeneration, multipotency, stemness, symbiosis, environmentThe heuristic value of the Hydra model systemIn the early 18th century the word biology was not yet in use but the nature of living organisms and their evolutionary relationships was the focus of interest for philosophers and naturalists, as evidenced by their pioneering efforts to develop new tools such as microscopes that would allow finer observation (Palm, 1996). The microscopic observation of organisms taken in the field undoubtedly helped develop morphological keys to sort between the animal and vegetal kingdoms and to group them into phyla (Linnaeus, 1758). Among the ambiguous species that could not be easily classified were the seawater corals that looked like flowers (Watson, 1753;McConnell, 1990) and the freshwater Hydra polyp that was considered to exhibit both animal and vegetal features. For example, Hydra easily reproduces asexually through budding, a trait frequently assigned to plants or fungi.Having observed some Hydra polyps in a pond, Abraham Trembley (1710-1784) (who had received a PhD in mathematics from the University of Geneva (Switzerland) and was now educating the children of the Count of Bentick in the Netherlands) decided Int. J. Dev. Biol. 56: 411-423 (2012) to solve that problem by testing their capacity to regenerate, assuming that if Hydra regenerates, then it should be considered a plant, but if it does...

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Phylogeny and biogeography of Hydra (Cnidaria: Hydridae) using mitochondrial and nuclear DNA sequences

Cited by 98 publications

References 30 publications

Transplantation analysis of developmental mechanisms in Hydra

Transplantation analysis of developmental mechanisms in Hydra

Phylogenetic placement of Hydra and relationships within Aplanulata (Cnidaria: Hydrozoa)

Hydra, a fruitful model system for 270 years

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