Sexual and asexual reproduction in the colonial ascidian Botryllus schlosseri

@article{Gasparini2015SexualAA,
  title={Sexual and asexual reproduction in the colonial ascidian Botryllus schlosseri},
  author={F. Gasparini and L. Manni and F. Cima and G. Zaniolo and P. Burighel and F. Caicci and N. Franchi and F. Schiavon and F. Rigon and D. Campagna and L. Ballarin},
  journal={genesis},
  year={2015},
  volume={53}
}
The colonial tunicate Botryllus schlosseri is a widespread filter‐feeding ascidian that lives in shallow waters and is easily reared in aquaria. Its peculiar blastogenetic cycle, characterized by the presence of three blastogenetic generations (filtering adults, buds, and budlets) and by recurrent generation changes, has resulted in over 60 years of studies aimed at understanding how sexual and asexual reproduction are coordinated and regulated in the colony. The possibility of using different… Expand
Life history and ecological genetics of the colonial ascidian Botryllus schlosseri
TLDR
Studying the relationship between genetic polymorphism and the adaptation of B. schlosseri to environmental stress is a challenge of future research and will improve the understanding of its evolutionary success and invasive potential. Expand
Gonad development and hermaphroditism in the ascidian Botryllus schlosseri
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The techniques and approaches developed to study germ cell migration and gonad formation in B. schlosseri are reviewed, and novel videos showing processes related to oocyte ovulation and sperm discharge are included. Expand
Sixty years of experimental studies on the blastogenesis of the colonial tunicate Botryllus schlosseri.
TLDR
A review of B. schlosseri studies and experiments performed to characterize the colony life cycle and bud development and how the ability to fuse and create chimeras was used to show that within a chimera somatic and germline stem cells compete to populate niches and regenerate tissue or germline organs. Expand
Vascular budding in Symplegma brakenhielmi and the evolution of coloniality in styelid ascidians.
TLDR
It is proposed that the higher degree of developmental independence in S. brakenhielmi budding is a result of its ancestral solitary mode of development. Expand
Transcriptome dynamics in the asexual cycle of the chordate Botryllus schlosseri
TLDR
The transcriptome changes during the blastogenetic cycle of the chordate Botryllus schlosseri are offered, showing up- and down-regulated genes, important for the comprehension of the events underlying colony growth and regression, cell proliferation, colony homeostasis, and competition among different generations. Expand
Artificial seawater based long-term culture of colonial ascidians
Tunicates are highly diverse marine invertebrate filter-feeders that are vertebrates’ closest relatives. These organisms, despite a drastically different body plan during their adulthood, have aExpand
Coupling astogenic aging in the colonial tunicate Botryllus schlosseri with the stress protein mortalin.
TLDR
It is proposed that mortalin plays a significant role in the astogeny and aging of colonial modules in B. schlosseri, by direct involvement in the regulation of blastogenesis. Expand
Urochordata: Botryllus – Natural Chimerism and Tolerance Induction in a Colonial Chordate
TLDR
The discoveries of the nature of the cells that mediate chimerism in colonial ascidians and the gene that controls it are reviewed, which represent a nexus between stem cell competition, genome parasitism, and allorecognition. Expand
The haemocytes of the colonial aplousobranch ascidian Diplosoma listerianum: Structural, cytochemical and functional analyses.
TLDR
A particular cell type showing exceptional development of the Golgi apparatus and large vacuoles containing a filamentous material has been recognised (spherule cell), for which a role in tunic repair and fibrogenesis has been hypothesised. Expand
Protection from Oxidative Stress in Immunocytes of the Colonial Ascidian Botryllus schlosseri: Transcript Characterization and Expression Studies
TLDR
Results indicated that i) antioxidant gene expression is modulated in the course of the blastogenetic cycle and upon exposure to Cd, and ii) hemocytes synthesize both enzymatic and nonenzymatic antioxidants, in line with the idea that they represent a major detoxification system for ascidians. Expand
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