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Intact cluster and chordate-like expression of ParaHox genes in a sea star
The identification of P. miniata ParaHox genes has revealed the fact that these genes are clustered in the genome, in contrast to what has been reported for echinoids, and it becomes clear that within echinoderms, sea urchins have modified the original bilaterian arrangement.
A dynamic regulatory network explains ParaHox gene control of gut patterning in the sea urchin
A novel mechanistic explanation of how the control of transcription is linked to cell differentiation and morphogenesis for the development of a perfectly organized biological system such as the sea urchin larval gut is offered.
Multisignal control of expression of the LHCX protein family in the marine diatom Phaeodactylum tricornutum
- L. Taddei, G. R. Stella, A. Falciatore
- Biology, Environmental ScienceJournal of experimental botany
- 25 May 2016
Highlight Multiple stress signalling pathways regulate LHCX family gene expression in the diatom Phaeodactylum tricornutum to attune acclimation responses efficiently in highly variable ocean…
Identification of an intact ParaHox cluster with temporal colinearity but altered spatial colinearity in the hemichordate Ptychodera flava
The genomic organization and expression of ParaHox genes in the indirect developing hemichordate acorn worm Ptychodera flava are investigated and strongly suggest that intact ParAHox gene clustering was retained in the deuterostome ancestor and is correlated with temporal colinearity.
bHLH-PAS protein RITMO1 regulates diel biological rhythms in the marine diatom Phaeodactylum tricornutum
- Rossella Annunziata, Andrés Ritter, A. Falciatore
- Biology, Environmental ScienceProceedings of the National Academy of Sciences
- 6 June 2019
Daily oscillations of gene expression and cell fluorescence in the diatom Phaeodactylum tricornutum, which persist in the absence of external timing cues are reported, demonstrating the existence of an endogenous circadian clock in diatoms.
Dealing with light: the widespread and multitasking cryptochrome/photolyase family in photosynthetic organisms.
Pattern and process during sea urchin gut morphogenesis: The regulatory landscape
- Rossella Annunziata, M. Perillo, Carmen Andrikou, A. Cole, P. Martinez, M. Arnone
- 1 March 2014
A lesson of remarkable importance has been learnt from comparison of the mechanisms involved in gut formation in different bilaterian animals; some of these genetic mechanisms are particularly well conserved.
Marine diatoms change their gene expression profile when exposed to microscale turbulence under nutrient replete conditions
It is demonstrated that in fact diatoms actively respond to turbulence in non-limiting nutrient conditions, challenging the view of phytoplankton as unsophisticated passive organisms.
The upstream regulatory sequence of the light harvesting complex Lhcf2 gene of the marine diatom Phaeodactylum tricornutum enhances transcription in an orientation- and distance-independent fashion.
Development and evolution of gut structures: from molecules to function
- Rossella Annunziata, Carmen Andrikou, M. Perillo, C. Cuomo, M. Arnone
- BiologyCell and Tissue Research
- 24 August 2019
An impressive degree of conservation emerges when comparing the transcription factor toolkits recruited for gut cells and tissue differentiation in animals as diverse as echinoderms and vertebrates, thus suggesting that their function emerged in the deuterostome ancestor.