- Seminars - maillist.psb.ugent.be

PSB event reminder
by contact＠psb.vib-ugent.be 07 Dec '09

07 Dec '09

Calendar Name: seminars Scheduled for: Monday, December 7 2009, 11:00 - 12:30 Event text: Prof Cris Kuhlemeier Institute of Plant Sicences University of Bern Bern Switzerland Details: �Auxin and Phyllotaxis� ABSTRACT Phyllotaxis, the regular arrangement of leaves or flowers around a plant stem, is an example of developmental pattern formation and organogenesis. Phyllotaxis is characterized by the divergence angles between the organs, the most common angle being 137.5�, the golden angle. Models of phyllotaxis must explain its de novo establishment in the radially symmetric embryo, the stable maintenance of the different arrangements and the observed transitions between phyllotactic patterns. Most importantly, they must explain the specific divergence angles of 180�, 90�, 137.5� and in rarer cases other angles as well. This quantitative aspect makes phyllotaxis an unusual developmental problem. It has traditionally attracted the interest of mathematicians and computer scientists, who have constructed a wide variety of simulation models. To the biologist it is surprising that only minimal assumptions about the underlying molecular mechanisms are sufficient to arrive at mathematical models that correctly and robustly recreate phyllotactic patterns. In this presentation I will give an overview of the experimental work on phyllotaxis and how these experiments form the basis for a new generation of simulation models. The interplay between modeling and experiment will be discussed. Kuhlemeier, C., Phyllotaxis. Trends Plant Sci., 2007. 12: p. 143-150.

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PSB event reminder
by contact＠psb.vib-ugent.be 05 Dec '09

05 Dec '09

Calendar Name: seminars Scheduled for: Monday, December 7 2009, 11:00 - 12:30 Event text: Prof Cris Kuhlemeier Institute of Plant Sicences University of Bern Bern Switzerland Details: �Auxin and Phyllotaxis� ABSTRACT Phyllotaxis, the regular arrangement of leaves or flowers around a plant stem, is an example of developmental pattern formation and organogenesis. Phyllotaxis is characterized by the divergence angles between the organs, the most common angle being 137.5�, the golden angle. Models of phyllotaxis must explain its de novo establishment in the radially symmetric embryo, the stable maintenance of the different arrangements and the observed transitions between phyllotactic patterns. Most importantly, they must explain the specific divergence angles of 180�, 90�, 137.5� and in rarer cases other angles as well. This quantitative aspect makes phyllotaxis an unusual developmental problem. It has traditionally attracted the interest of mathematicians and computer scientists, who have constructed a wide variety of simulation models. To the biologist it is surprising that only minimal assumptions about the underlying molecular mechanisms are sufficient to arrive at mathematical models that correctly and robustly recreate phyllotactic patterns. In this presentation I will give an overview of the experimental work on phyllotaxis and how these experiments form the basis for a new generation of simulation models. The interplay between modeling and experiment will be discussed. Kuhlemeier, C., Phyllotaxis. Trends Plant Sci., 2007. 12: p. 143-150.

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seminar Prof Cris Kuhlemeier
by Nathalie Vanden Hautte 30 Nov '09

30 Nov '09

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> . 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 30 Nov '09

30 Nov '09

Calendar Name: seminars Scheduled for: Monday, November 30 2009, 11:00 - 12:30 Event text: Prof Dr Karin Schumacher Heidelberg Institute for Plant Sciences (HIP) University of Heidelberg GERMANY Details: "The V-ATPase-an engine for transport and traffic" ABSTRACT Compartmentation allows the simultaneous occurrence of biochemical processes in different reaction spaces and necessitates the exchange of material via membrane transport or vesicular intermediates. In my presentation, I will focus on the V-ATPase, a proton pump found throughout the endomembrane system of all eukaryotes and will demonstrate that it is not only important for secondary active membrane transport but also for membrane trafficking. Specifically, I will discuss the importance of the Arabidopsis V-ATPase for the dynamics and identity of the trans-Golgi network/early endosome as well as the contribution of the V-ATPase at the tonoplast to vacuolar acidification and transport.

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PSB event reminder
by contact＠psb.vib-ugent.be 28 Nov '09

28 Nov '09

Calendar Name: seminars Scheduled for: Monday, November 30 2009, 11:00 - 12:30 Event text: Prof Dr Karin Schumacher Heidelberg Institute for Plant Sciences (HIP) University of Heidelberg GERMANY Details: "The V-ATPase-an engine for transport and traffic" ABSTRACT Compartmentation allows the simultaneous occurrence of biochemical processes in different reaction spaces and necessitates the exchange of material via membrane transport or vesicular intermediates. In my presentation, I will focus on the V-ATPase, a proton pump found throughout the endomembrane system of all eukaryotes and will demonstrate that it is not only important for secondary active membrane transport but also for membrane trafficking. Specifically, I will discuss the importance of the Arabidopsis V-ATPase for the dynamics and identity of the trans-Golgi network/early endosome as well as the contribution of the V-ATPase at the tonoplast to vacuolar acidification and transport.

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PSB event reminder
by contact＠psb.vib-ugent.be 24 Nov '09

24 Nov '09

Calendar Name: seminars Scheduled for: Tuesday, November 24 2009, 11:00 - 12:30 Event text: Dr Arp Schnittger Institut de Biologie Mol�culaire des Plantes du CNRS IBMP-CNRS - UPR2357 Universit� de Strasbourg Department of Molecular Mechanisms of Phenotypic Strasbourg FRANCE Details: �Analysis of the major cell cycle kinase CDKA;1 during Arabidopsis growth and development� ABSTRACT Proper control of cell proliferation is of key importance for any multicellular organism and requires a tight coordination with growth and differentiation. At the heart of the eukaryotic cell cycle are cyclin-dependent kinases (CDKs) that regulate the entry into the next cell-cycle phase. In particular, high levels of CDK activity are required for entry and progression of DNA synthesis phase (S-phase) and for execution of mitosis (M-phase). CDKs function as microprocessors and integrate extrinsic cues, such as nutrient availability, with intrinsic cues, for instance the developmental program and only if a certain threshold of CDK activity is reached will the entry into the next cell-cycle phase be promoted. Here, I will focus on the control and function of the major cell cycle regulator CDKA;1, the Arabidopsis homolog of the animal Cdk1 protein. CDKA;1 is required throughout plant development, starting from meiosis to the development of the gametophytes, embryonic and postembryonic growth. Comparing the action and regulation of CDKs in plants with what has been found in other model organisms shows that the mechanistics of Cdk1-like kinases are conserved. However, the regulatory context and the wiring appear to be species-specific adapted.

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PSB event reminder
by contact＠psb.vib-ugent.be 22 Nov '09

22 Nov '09

Calendar Name: seminars Scheduled for: Tuesday, November 24 2009, 11:00 - 12:30 Event text: Dr Arp Schnittger Institut de Biologie Mol�culaire des Plantes du CNRS IBMP-CNRS - UPR2357 Universit� de Strasbourg Department of Molecular Mechanisms of Phenotypic Strasbourg FRANCE Details: �Analysis of the major cell cycle kinase CDKA;1 during Arabidopsis growth and development� ABSTRACT Proper control of cell proliferation is of key importance for any multicellular organism and requires a tight coordination with growth and differentiation. At the heart of the eukaryotic cell cycle are cyclin-dependent kinases (CDKs) that regulate the entry into the next cell-cycle phase. In particular, high levels of CDK activity are required for entry and progression of DNA synthesis phase (S-phase) and for execution of mitosis (M-phase). CDKs function as microprocessors and integrate extrinsic cues, such as nutrient availability, with intrinsic cues, for instance the developmental program and only if a certain threshold of CDK activity is reached will the entry into the next cell-cycle phase be promoted. Here, I will focus on the control and function of the major cell cycle regulator CDKA;1, the Arabidopsis homolog of the animal Cdk1 protein. CDKA;1 is required throughout plant development, starting from meiosis to the development of the gametophytes, embryonic and postembryonic growth. Comparing the action and regulation of CDKs in plants with what has been found in other model organisms shows that the mechanistics of Cdk1-like kinases are conserved. However, the regulatory context and the wiring appear to be species-specific adapted.

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seminar Prof Karin Schumacher
by Nathalie Vanden Hautte 12 Nov '09

12 Nov '09

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> . 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 Dr Arp Schnittger
by Nathalie Vanden Hautte 12 Nov '09

12 Nov '09

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> . 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 09 Nov '09

09 Nov '09

Calendar Name: seminars Scheduled for: Monday, November 9 2009, 9:00 - 17:30 Event text: Prof Dr Patricia Claire Zambryski Colloquium: Intra- and intercellular transport Details: More information on http://www.psb.ugent.be. Speakers: Ulla Bonas Institut f�r Biologie/Genetik, Martin-Luther-Universit�t Halle, GERMANY "How type III effector proteins manipulate the plant cell" Savvas Savvides Unit for Structural Biology, Ghent University Ghent, BELGIUM "Motorizing bacterial secretion systems: Turning, Swinging, Pulling, Pushing" Manfred Heinlein Institut de Biologie Mol�culaire des Plantes, CNRS Strasbourg, FRANCE "Mechanisms involved in tobacco mosaic virus movement" Peter Mergaert Institut des Sciences du V�g�tal - CNRS Gif-sur-Yvette, FRANCE "Antimicrobial peptides govern terminal differentiation of endosymbiotic bacteria in the Rhizobium-legume symbiosis" Luis Herrera-Estrella Centre for Research and Advanced Studies Irapuato, MEXICO "Signaling during the phosphate deprivation response in Arabidopsis" Patricia Zambryski Department of Plant and Microbial Biology, Koshland Hall, University of California Berkeley, CA, USA "Recent insights into Agrobacterium mediated DNA transfer to plants an intercellular transport between plant cells via plasmodesmata"

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