November 2011 - Seminars - maillist.psb.ugent.be

Seminar Dr Moritz Nowack 5/12
by Delphine Verspeel 29 Nov '11

29 Nov '11

You are receiving this e-mail because you subscribed to our seminars announcements and reminders service at <https://maillist.psb.ugent.be/mailman/listinfo/seminars> https://maillist.psb.ugent.be/mailman/listinfo/seminars. If you do not wish to receive this information anymore, please unsubscribe from future mailings at <https://maillist.psb.ugent.be/mailman/options/seminars> https://maillist.psb.ugent.be/mailman/options/seminars. cid:946540515@15122008-0D1C PSB cid:946540515@15122008-0D23 VIB - Department of Plant Systems Biology Technologiepark 927 B - 9052 Gent/Zwijnaarde Phone: +32 9 33 13 800 Fax: +32 9 33 13 809 Http://www.psb.vib-ugent.be

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PSB event reminder
by contact＠psb.vib-ugent.be 29 Nov '11

29 Nov '11

Calendar Name: seminars Scheduled for: Thursday, December 1 2011, 11:00 - 12:30 Event text: Assistant Prof Henrik J�nsson Computational Biology and Biological Physics Lund University SWEDEN & Sainsbury Laboratory University of Cambridge UNITED KINGDOM Details: �Computational Morphodynamics models of the shoot apical meristem� ABSTRACT The shoot apical meristem (SAM) is a stem cell niche acting as a main regulator of above-ground plant development. The maintenance of stem cells in the SAM, and the initiation of organs at the periphery are dependent on genetic regulation, hormone signaling, and mechanical anisotropies resulting in a complex dynamical system regulating organized differentiation and growth. Mathematical modeling has proven to be a useful tool to understand SAM development at a systems level, and the use of live microscopy has increased our knowledge of details in the protein dynamics associated with SAM development. The emerging field of Computational Morphodynamics aims at increasing the understanding of developmental systems by combining computational models whith microscopy data that provides four dimensional experimental templates for optimizing the models, and then predictions of the models are to be verified in experiments, in an iterative loop between experiments and computation. In this talk I will discuss models for stem cell regulation and primordia formation in the SAM. I will give examples of models where hormone signaling and transport are combined with mechanical models for generating phyllotactic patterns as well as models for stem cell regulation focusing on the CLAVATA WUSCHEL feedback. I will further discuss how we use model optimization to fit the models to templates where expression regions are marked in spatial regions relating to confocal images, and how this is used to make model predictions for the molecular networks.

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PSB event reminder
by contact＠psb.vib-ugent.be 28 Nov '11

28 Nov '11

Calendar Name: seminars Scheduled for: Monday, November 28 2011, 11:00 - 12:30 Event text: Prof Natasha Raikhel Center for Plant Cell Biology & the Institute for Integrative Genome Biology Department of Botany and Plant Sciences University of California Riverside USA Details: �Chemical Biology:Towards a Systems View of the Endomembrane system� ABSTRACT Although it is known that proteins are delivered to and recycled from the plasma membrane (PM) via endosomes, the nature of the compartments and pathways responsible for cargo and vesicle sorting and cellular signaling is poorly understood. Such highly dynamic processes are not easily approached genetically. To define and dissect specific recycling pathways, rapid-acting chemical affecters of proteins involved in vesicle trafficking, especially through endosomes, would be invaluable. Thus, we identified chemicals affecting essential steps in PM/endosome trafficking by utilizing the intensely localized PM transport at the tips of germinating tobacco pollen tubes. We screened diverse chemical libraries for those that interfered with pollen germination and tip growth. We found that many also had effects in Arabidopsis roots for which there are several well-characterized marker proteins that cycle to and from the plasma membrane. Recent results from our screens will be discussed.

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PSB event reminder
by contact＠psb.vib-ugent.be 26 Nov '11

26 Nov '11

Calendar Name: seminars Scheduled for: Monday, November 28 2011, 11:00 - 12:30 Event text: Prof Natasha Raikhel Center for Plant Cell Biology & the Institute for Integrative Genome Biology Department of Botany and Plant Sciences University of California Riverside USA Details: �Chemical Biology:Towards a Systems View of the Endomembrane system� ABSTRACT Although it is known that proteins are delivered to and recycled from the plasma membrane (PM) via endosomes, the nature of the compartments and pathways responsible for cargo and vesicle sorting and cellular signaling is poorly understood. Such highly dynamic processes are not easily approached genetically. To define and dissect specific recycling pathways, rapid-acting chemical affecters of proteins involved in vesicle trafficking, especially through endosomes, would be invaluable. Thus, we identified chemicals affecting essential steps in PM/endosome trafficking by utilizing the intensely localized PM transport at the tips of germinating tobacco pollen tubes. We screened diverse chemical libraries for those that interfered with pollen germination and tip growth. We found that many also had effects in Arabidopsis roots for which there are several well-characterized marker proteins that cycle to and from the plasma membrane. Recent results from our screens will be discussed.

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Seminar Assitant Prof Henrik Jönsson
by Delphine Verspeel 25 Nov '11

25 Nov '11

You are receiving this e-mail because you subscribed to our seminars announcements and reminders service at <https://maillist.psb.ugent.be/mailman/listinfo/seminars> https://maillist.psb.ugent.be/mailman/listinfo/seminars. If you do not wish to receive this information anymore, please unsubscribe from future mailings at <https://maillist.psb.ugent.be/mailman/options/seminars> https://maillist.psb.ugent.be/mailman/options/seminars. cid:946540515@15122008-0D1C PSB cid:946540515@15122008-0D23 VIB - Department of Plant Systems Biology Technologiepark 927 B - 9052 Gent/Zwijnaarde Phone: +32 9 33 13 800 Fax: +32 9 33 13 809 Http://www.psb.vib-ugent.be

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Seminar Prof Natasha Raikhel 28/11
by Delphine Verspeel 24 Nov '11

24 Nov '11

You are receiving this e-mail because you subscribed to our seminars announcements and reminders service at <https://maillist.psb.ugent.be/mailman/listinfo/seminars> https://maillist.psb.ugent.be/mailman/listinfo/seminars. If you do not wish to receive this information anymore, please unsubscribe from future mailings at <https://maillist.psb.ugent.be/mailman/options/seminars> https://maillist.psb.ugent.be/mailman/options/seminars. cid:946540515@15122008-0D1C PSB cid:946540515@15122008-0D23 VIB - Department of Plant Systems Biology Technologiepark 927 B - 9052 Gent/Zwijnaarde Phone: +32 9 33 13 800 Fax: +32 9 33 13 809 Http://www.psb.vib-ugent.be

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PSB event reminder
by contact＠psb.vib-ugent.be 24 Nov '11

24 Nov '11

Calendar Name: seminars Scheduled for: Thursday, November 24 2011, 11:00 - 12:30 Event text: Prof Jiri Friml VIB, Dept. of Plant Systems Biology Ghent University Gent BELGIUM Details: "How cells make a plant: role for cell polarity and endocytic trafficking" ABSTRACT In plants, more than in other eukaryotes, establishment of cell polarity is one of the major developmental themes. Even fully specified plant cells often retain potential to re-define their polarity which is utilized during organ formation, tissue regeneration and multiple other patterning events. The process of tissue polarization inevitably encompasses de novo specification of individual cell polarities in cells within a polarizing tissue. The connection between cellular polarizing events and macroscopic manifestation of polarity such as specification of different cell types along the axis, depend on an action of the signalling molecule auxin and its intercellular directional movement. Auxin is a prominent intercellular signal in plants and its polar cell-to-cell transport is required for various developmental processes including apical-basal axis formation, organogenesis and tropisms. The prominent molecular components of polar auxin transport are auxin efflux transporters of the PIN family, each with specific polar, subcellular localization, which determines direction of auxin flow. Despite critical importance of polar PIN localisation for plant development, little is known about how it is decided to which side of cell PIN proteins will be (re)targeted. Available data suggest existence of sequence-specific polar targeting signals and cell type-specific determinants. Here we will present cellular mechanisms for cell polarity establishment and maintenance and novel molecular components of apical/basal targeting along with possible general mechanisms of cell polarity in plants. The emerging data provide a conceptual framework explaining some of important mechanisms behind astonishing flexibility and adaptability of plant development.

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PSB event reminder
by contact＠psb.vib-ugent.be 22 Nov '11

22 Nov '11

Calendar Name: seminars Scheduled for: Thursday, November 24 2011, 11:00 - 12:30 Event text: Prof Jiri Friml VIB, Dept. of Plant Systems Biology Ghent University Gent BELGIUM Details: "How cells make a plant: role for cell polarity and endocytic trafficking" ABSTRACT In plants, more than in other eukaryotes, establishment of cell polarity is one of the major developmental themes. Even fully specified plant cells often retain potential to re-define their polarity which is utilized during organ formation, tissue regeneration and multiple other patterning events. The process of tissue polarization inevitably encompasses de novo specification of individual cell polarities in cells within a polarizing tissue. The connection between cellular polarizing events and macroscopic manifestation of polarity such as specification of different cell types along the axis, depend on an action of the signalling molecule auxin and its intercellular directional movement. Auxin is a prominent intercellular signal in plants and its polar cell-to-cell transport is required for various developmental processes including apical-basal axis formation, organogenesis and tropisms. The prominent molecular components of polar auxin transport are auxin efflux transporters of the PIN family, each with specific polar, subcellular localization, which determines direction of auxin flow. Despite critical importance of polar PIN localisation for plant development, little is known about how it is decided to which side of cell PIN proteins will be (re)targeted. Available data suggest existence of sequence-specific polar targeting signals and cell type-specific determinants. Here we will present cellular mechanisms for cell polarity establishment and maintenance and novel molecular components of apical/basal targeting along with possible general mechanisms of cell polarity in plants. The emerging data provide a conceptual framework explaining some of important mechanisms behind astonishing flexibility and adaptability of plant development.

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Upcoming seminars December
by Delphine Verspeel 21 Nov '11

21 Nov '11

Dear All, Enclosed you can find our upcoming seminars for December. Kind regards, Delphine ____________________________________________ Delphine Verspeel Administrative Assistant VIB, Department of Plant Systems Biology Ghent University Technologiepark 927 9052 Gent Belgium Phone: +32/9/33.13.800 Fax: +32/33.13.809 <Http://www.psb.ugent.be> Http://www.psb.ugent.be <mailto:nahau@psb.vib-ugent.be> despe(a)psb.vib-ugent.be

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Seminar Prof Jiri Friml 24/11
by Delphine Verspeel 18 Nov '11

18 Nov '11

You are receiving this e-mail because you subscribed to our seminars announcements and reminders service at <https://maillist.psb.ugent.be/mailman/listinfo/seminars> https://maillist.psb.ugent.be/mailman/listinfo/seminars. If you do not wish to receive this information anymore, please unsubscribe from future mailings at <https://maillist.psb.ugent.be/mailman/options/seminars> https://maillist.psb.ugent.be/mailman/options/seminars. cid:946540515@15122008-0D1C PSB cid:946540515@15122008-0D23 VIB - Department of Plant Systems Biology Technologiepark 927 B - 9052 Gent/Zwijnaarde Phone: +32 9 33 13 800 Fax: +32 9 33 13 809 Http://www.psb.vib-ugent.be

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