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Identifier 000434270
Title The role of Arobidopsis thaliana Kin7/Separase complex (KISC) in light signaling pathways
Alternative Title Ο ρόλος του συμπλόκου Kin7/Separase στα φωτορυθμιζόμενα σηματοδοτικά μονοπάτια στο φυτό Arobidopsis thaliana
Author Φραγκιαδάκη, Αναστασία Ε.
Thesis advisor Μόσχου, Παναγιώτης
Reviewer Καλαντίδης, Κρίτων
Κοτζαμπάσης, Κυριάκος
Abstract As sessile organisms, plants have developed numerous physiological adaptations, such as light capture optimization. Fluctuations in spectral composition and intensity of incoming sunlight are perceived by a plethora of photoreceptors, responsible for the initiation of a signal cascade, known as light signaling. The evident complexity of the signal network underlines the long evolutionary time plants have gone through, while at the same time, it implies that, despite our growing understanding towards this network, our current knowledge remains incomplete. This study aims to contribute to the better understanding of the light signaling events, through investigating the involvement of a novel complex in light signaling cascade. Specifically, this thesis examined the biological function of Kin7/Separase complex (KISC) under the scope of photobiology, by pursuing two different, yet converging approaches. On the one hand, it included validation of some of the potential protein-protein interactions (PPIs) between KISC and light signaling components. On the other hand, physiological experiments were conducted, using different loss-of-function mutant lines related to KISC, which were phenotypically characterized in response to different light qualities. It was shown that Kinesin7.3 (Kin7.3), a core component of KISC, interacts through its tail domain with one of the major blue-light and UV-A photoreceptors, known as Phototropin1 (PHOT1). Furthermore, KISC was shown to be involved in hypocotyl growth inhibition upon blue light exposure, as well as in phototropism, leaf flattening, and leaf positioning responses. Taken together, the resulting preliminary data suggest that KISC acts in the crossroads of phototropin- and phytochrome-mediated signal transduction. Additionally, my data suggest that KISC constitutes a necessary complex for the autotropism response.
Language English
Subject Auxin
Kinesin
Photochrome
Phototropin
Responses
Separase
Αποκρίσεις
Αυξίνη
Κινεσίνη
Σεπαράση
Σηματοδότηση
Φυτόχρωμα
Φως
Φωτοτροπίνη
Issue date 2020-11-27
Collection   School/Department--School of Sciences and Engineering--Department of Biology--Post-graduate theses
  Type of Work--Post-graduate theses
Permanent Link https://elocus.lib.uoc.gr//dlib/a/a/3/metadata-dlib-1606379888-973175-18763.tkl Bookmark and Share
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