Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2017
Authors
Iryna Matsiakh Magdalena Kacprzyk Dmitry L. Musolin Andrey V. Selikhovkin Yuri N. Baranchikov Andrea Vannini Venche Talgø Simone ProsperoAbstract
No abstract has been registered
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Authors
Iryna Matsiakh Dimitrios N. Avtzis Kalev Adamson Sylvie Augustin Refika Ceyda Beram Thomas Cech Rein Drenkhan Natalia Kirichenko Giorgio Maresi Carmen Morales-Rodriguez Leopold Poljakovic-Pajnik Alain Roques Venche Talgø Anna Maria Vettraino Johanna WitzellAbstract
No abstract has been registered
Authors
Iryna Matsiakh Johanna Witzell Leopold Poljakovic-Pajnik Marc Kenis Venche Talgø Traian Manole Irina Ionescu-Malancus Marek BartaAbstract
No abstract has been registered
Authors
Magdalena Kacprzyk Iryna Matsiakh Dmitry L. Musolin Andrey V. Selikhovkin Yuri N. Baranchikov Daiva Burokiene Thomas Cech Venche Talgø Anna Maria Vettraino Andrea Vannini Simone ProsperoAbstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Natalia Kirichenko Sylvie Augustin Ellie Barham Thomas Cech Rein Drenkhan Carmen Morales-Rodriguez Iryna Matsiakh Alain Roques Venche Talgø Anna Maria Vettraino Johanna WitzellAbstract
No abstract has been registered
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No abstract has been registered
Abstract
The plant hormone auxin is a vital component for plant reproduction as it regulates the development of both male and female reproductive organs, including ovules and gynoecia. Furthermore, auxin plays important roles in the development and growth of seeds and fruits. Auxin responses can be detected in ovules shortly after fertilization, and it has been suggested that this accumulation is a prerequisite for the developmental reprogramming of the ovules to seeds, and of the gynoecium to a fruit. However, the roles of auxin at the final stages of ovule development, and the sources of auxin leading to the observed responses in ovules after fertilization have remained elusive. Here we have characterized the auxin readout in Arabidopsis ovules, at the pre-anthesis, anthesis and in the immediate post-fertilization stages, using the R2D2 auxin sensor. In addition we have mapped the expression of auxin biosynthesis and conjugation genes, as well as that of auxin transporting proteins, during the same developmental stages. These analyses reveal specific spatiotemporal patterns of the different auxin homeostasis regulators. Auxin biosynthesis genes and auxin transport proteins define a prepatterning of vascular cell identity in the pre-anthesis funiculus. Furthermore, our data suggests that auxin efflux from the ovule is restricted in an anther-dependent manner, presumably to synchronize reproductive organ development and thereby optimizing the chances of successful fertilization. Finally, de novo auxin biosynthesis together with reduced auxin conjugation and transport result in an enhanced auxin readout throughout the sporophytic tissues of the ovules soon after fertilization. Together, our results suggest a sophisticated set of regulatory cascades that allow successful fertilization and the subsequent transition of the female reproductive structures into seeds and fruits.